to the Renewable Energy Rider Agreement
APPROVED BY THE FTC JUNE 19, 2015
BARBADOS LIGHT & POWER COMPANY LTD
RENEWABLE ENERGY RIDER AGREEMENT
This Renewable Energy Rider Agreement (this “Agreement”) is made this ____ day of
______________, (the “Effective Date”) BETWEEN the party described at Item 1 of Schedule A
to this Agreement (the “Customer-Generator”) and THE BARBADOS LIGHT & POWER
COMPANY LIMITED, a company incorporated under the Companies Act, Cap. 308 of the Laws
of Barbados and having its registered office situate at Garrison Hill, St Michael, Barbados
(“BL&P”).
WITNESSETH THAT:
WHEREAS:
A.
BL&P carries on the business of producing and distributing electrical energy pursuant to
the Electric Light and Power Act, (ELPA) Cap. 278 of the Laws of Barbados.
B.
BL&P is currently engaged in a Renewable Energy Rider Programme (the “Rider
Programme”) whereby it will interconnect with a Customer-Generator who operates wind
and/or solar generating systems approved by BL&P and purchase electrical energy
generated by those customers at the approved tariff rate in the “Renewable Energy
Rider”, a copy of which is attached at Schedule C to this Agreement.
C.
The Customer-Generator is a customer of BL&P who desires to participate in the Rider
Programme by operating a solar and/or wind Renewable Generation System (“RGS”)
with combined Nameplate Gross Power Rating of the kilowatts specified at Item 3 of
Schedule A to this Agreement to be operated at the location specified at Item 2 of
Schedule A to this Agreement and to make available and sell electrical energy
generated by the RGS to BL&P.
D.
The Customer-Generator qualifies for the Renewable Energy Rider and his RGS meets
the eligibility requirements in BL&P’s “Requirements for Grid Interconnection of
Renewable Generation Systems” a copy of which is attached at Schedule B to this
Agreement.
E.
BL&P wishes to purchase electrical energy generated by the RGS pursuant to the terms
and conditions of this Agreement and the Schedules attached hereto.
APPROVED BY THE FTC JUNE 19, 2015
F.
The Customer-Generator agrees to submit to BL&P prior to commencing operations, all
required approvals for the RGS installation from the Government Electrical Engineering
Department and other governmental authorities having jurisdiction over the CustomerGenerator or the RGS.
G.
The BL&P shall administer the RER Agreement in accordance with the applicable
provisions of the ELPA and any other relevant laws of Barbados.
NOW THEREFORE, in consideration of the mutual benefits to be derived and the
representations, warranties, conditions and promises contained in this Agreement, the
Customer-Generator and BL&P agrees to the Terms and Conditions as detailed in Appendix 1:
IN WITNESS WHEREOF the undersigned have executed this Agreement on the year and date
hereinbefore mentioned.
SIGNED by THE BARBADOS LIGHT & POWER
COMPANY LIMITED
in the presence of:
)
) …………………………………………..
)
Duly Authorized Officer
Witness:
Name:
Abode:
Calling or Description:
SIGNED by CUSTOMER-GENERATOR
In the presence of
)
) …………………………………………..
Witness:
Name:
Abode:
Calling or Description:
BARBADOS LIGHT & POWER COMPANY LTD – RENEWABLE ENERGY RIDER AGREEMENT - FINAL
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APPROVED BY THE FTC JUNE 19, 2015
RENEWABLE ENERGY RIDER AGREEMENT
APPENDIX 1
1. INTERPRETATION
1.1
Definitions
Capitalized terms used in this Agreement shall have the meanings set forth
below:
“Agreement” means this Renewable Energy Rider Agreement and the
Schedules hereto attached.
“Buy All Sell All” means where the customer is billed by the BLPC (at the
normal electricity rate) for all the energy he/she consumes, regardless of the
source under the RER, and will receive a credit on the bill for all the electricity
generated from the RGS at the RER credit rate.
“Customer-Generator” means the person or entity who is a customer of BL&P
and who accepts responsibility for the electricity account associated with the
RGS.
“Effective Date” means the date on which the RER Agreement is signed by the
parties.
"Energy Credit" means the amount BL&P will credit the Customer Generator’s
account for the kWh delivered to the Grid, as determined in accordance with the
Renewable Energy Rider.
“Force Majeure Event” means:
(i)
hurricane, earthquake, flood, tidal wave, or other act of God;
(ii)
fire, strike, malicious damage, labour disturbances;
(iii)
war, terrorism, civil war, rebellion, riot;
(iv)
Any other cause beyond the control of a Party which was not
reasonably foreseeable or if foreseeable could not have been
prevented.
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“Grid” means the systems by which electric energy is generated, transmitted
and distributed to customers of BL&P and includes:
(i)
the equipment used to generate the electric energy,
(ii)
the network used to transmit the electric energy produced, and
(iii)
the poles, wires, transformers, substations and other equipment
used to deliver electric energy to consumers (the distribution
system).
A connection that in anyway links the supply from the RGS to BL&P’s supply,
whether the connection is before or after the meter (that is, internal or external to
the Customer’s installation) is considered to be interconnected with BL&P’s Grid.
“Interconnection Facilities” means all equipment and electrical hardware
between the RGS and the Point of Delivery required to interconnect the RGS
with the Grid.
"Metering System” means all meters and metering devices or equipment owned
by BL&P and used to measure the delivery and receipt of electricity.
“Nameplate Gross Power Rating” means the RGS manufacturer’s alternating
current (a.c). nameplate capacity.
“Net Billing”: means an arrangement that permits BL&P (using two meters or
one meter that separately measures inflows and outflows of electricity) to sell
power delivered to the Customer-Generator at the prevailing tariff, and buy power
from the Customer-Generator’s RGS at a different rate to offset the CustomerGenerator’s electricity bill.
“Operations Date” means the date on which the RGS is installed.
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“Owner of the RGS” means the legal and/or equitable owner of the RGS.
“Parties” means BL&P and the Customer-Generator together and “Party” means
either one of them.
"Point of Delivery” means the interconnection point or physical point where the
RGS and the Grid are electrically connected for metering purposes.
“Renewable Energy Rider Agreement” means the agreement between the
Customer-Generator and BL&P which sets forth the terms and conditions under
which the RGS is interconnected with the Grid. The agreement also contains the
terms and conditions under which the purchase and sale of electrical energy
occur between the two Parties.
“Renewable Generation System” means the total components and facilities
that, in combination, convert renewable energy into electrical energy suitable for
connection to utilization loads to offset part or all of the customer’s electricity
requirements and/or to provide electricity to the Grid.
“Sale of Excess” means where an RER customer is billed by BL&P (at the
normal electricity rate) for only what he uses from the grid and will receive a
credit for the excess electricity that he/she exports to the grid (i.e. the electricity
generated from his/her RGS that he did not use).
“Standard Electricity Tariff” means the tariff under which the CustomerGenerator is served by BL&P and to which the Renewable Energy Rider will
apply.
“Term” means the duration of the RER Agreement, that is the period between
the Effective Date and the termination of the Agreement.
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1.2
Entire Agreement
This Agreement and the accompanying Schedules together with the other
documents to be delivered under this Agreement represent the entire
understanding between the Parties with respect to the subject matter of this
Agreement
and
supersedes
all
previous
agreements,
arrangements,
understandings, negotiations and discussions, whether oral or written, between
the Parties in connection with the sale and purchase of electrical energy
generated by the RGS and the interconnection of the Customer-Generator’s
RGS with BL&P’s Grid.
1.3
Headings
Clause headings contained in this Agreement are included solely for
convenience and are not intended to be a full or accurate description of the
content of any clause and shall not be considered to be part of this Agreement.
1.4
Schedules
This Agreement includes the following schedules which are specifically
incorporated herein and made a part of this Agreement by reference:
Schedule A - Particulars for the Agreement
Schedule B - Requirements
for
Grid
Interconnection
of
Renewable
Generation Systems
Schedule C - Renewable Energy Rider
Schedule D - Standard Electricity Tariffs
1.5
Statutory Instruments
Any reference in this Agreement to any law, regulation, order, act or statute of
any governmental body or other regulatory body shall be construed as a
reference to those as amended or re-enacted from time to time or as a reference
to any successor to those.
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1.6
Words
Unless the context otherwise requires, words denoting the singular shall include
the plural and vice versa.
1.7
Highlight
Certain paragraphs of the Agreement have been highlighted solely for the
purposes of emphasis.
2.
TERM
2.1
This Agreement shall commence on the Effective Date and continue for the
period specified at Item 8 of Schedule A, in this Agreement unless terminated
earlier in accordance with the provisions of Clause 17 of this Agreement (“Early
Termination”) or extended by BL&P in accordance with the provisions of Clause
19 of this Agreement. Any Early Termination of this Agreement shall be without
prejudice to the rights and obligations accruing to the Parties prior to the Early
Termination.
2.2
Throughout the term of this Agreement the value of the RER credit shall be
determined by the latest Order of the Fair Trading Commission and is subject to
review as determined by the Fair Trading Commission.
3.
RGS INTERCONNECTION REQUIREMENTS
3.1
The Customer-Generator shall design, install, operate and maintain the RGS,
and all ancillary facilities on the Customer-Generator’s side of the Point of
Delivery, specified at Item 5 of Schedule A to this Agreement, in accordance with
the “Requirements for Grid Interconnection of Renewable Generation Systems”
and all governmental laws and regulations which may be applicable from time to
time.
3.2
The Customer-Generator shall obtain and maintain all required insurance
coverage, governmental authorizations, permits, licenses and approvals from all
governmental authorities, local agencies, commissions and authorities required
for the installation and operation of the RGS.
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3.3
The RGS shall meet all applicable safety and performance standards,
including the codes and standards described in the “Requirements for Grid
Interconnection of Renewable Generation Systems”. BL&P may, from time to
time, reasonably prescribe additional requirements, to be implemented at the
Customer-Generator’s expense, which in BL&P’s judgment are necessary for
ensuring the safety of the Grid. BL&P shall provide the Customer-Generator with
written notice of any additional requirements to be implemented pursuant to this
clause and the Customer-Generator shall have fourteen [14] days from the date
of the notice to implement the change to the satisfaction of BL&P.
3.4
“No RGS shall be connected to BL&P’s Grid without permission from
BL&P. This permission will be via the execution of the RER Agreement.
Within six (6) weeks of receiving notification from the customer that the
installation has been completed, BL&P will carry out inspections and
tests in accordance with Appendix 6 and will advise the applicant whether
or
not
the
proposed
interconnection
of
the
RGS
qualifies
for
interconnection to BL&P’s Grid.
4.
CUSTOMER-GENERATOR’S OBLIGATIONS
4.1
The Customer-Generator shall:
(i)
upon receipt of written approval from BL&P to interconnect the
RGS described at Items 3 and 4 of Schedule A to this Agreement
and installed at the address specified at the said Item 2 of
Schedule A (the “Service Address”) immediately connect the RGS
to BL&P’s Grid, unless the Customer-Generator obtains BL&P’s
written approval to postpone the interconnection;
(ii)
at all times operate and maintain the RGS in accordance with
all applicable governmental standards and requirements and
the instructions of the manufacturers of the equipment used
to construct the various components of the RGS;
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(iii)
at all times comply with BL&P standards and requirements relating
to the parallel operation of the RGS which may be in effect from
time to time;
(iv)
promptly notify BL&P of any malfunction or breakdown of any
component of the RGS that could constitute a foreseeable safety
hazard or reasonably be expected to cause disturbance or
damage to the Grid;
(v)
not operate the RGS so as to generate electricity at a rate greater
than 110% of the RGS’s Nameplate Gross Power Rating specified
at Item 3 of Schedule A to this Agreement;
(vi)
not add to or modify the RGS without the prior written consent of
BL&P;
(vii)
not alter, modify or tamper with the RGS connection to BL&P’s
Grid without BL&P’s prior written consent;
(viii)
not relocate or interconnect the RGS to BL&P’s Grid at any
location other than the Service Address without BL&P’s prior
written consent;
(ix)
not tamper with or alter the Metering System;
(x)
promptly comply with all requests from BL&P to interrupt the
service of the RGS, reduce the output from the RGS and
disconnect the RGS from BL&P’s Grid;
(xi)
at all times allow BL&P reasonable access to the RGS; and
(xii)
make all payments required to be made by it to BL&P on or before
the due date for the payment.
5.
BL&P’S OBLIGATIONS
5.1
Subject to the terms and conditions of this Agreement BL&P will interconnect
with the RGS located at the Service Address and supply electricity to and accept
delivery of electricity from the Customer-Generator (if applicable) at the Point of
Delivery specified at Item 5 of Schedule A to this Agreement.
5.2
BL&P will act with reasonable promptness to perform any inspections and give
any approvals that it is authorized or required to give under this Agreement.
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BL&P will not unreasonably withhold or delay the giving of its consent in any
case where its consent is required.
5.3
Subject to BL&P’s approval of the RGS and the Customer-Generator compliance
with all matters set out in the “Requirements for Grid Interconnection of
Renewable Generation Systems” BL&P shall take all necessary steps and
perform all acts necessary to facilitate interconnection of the RGS with BL&P’s
Grid.
6.
BL&P’S RIGHTS
6.1
BL&P shall have the right to require the Customer-Generator to interrupt
(including, if so specified by BL&P, by means of physical disconnection or
lockout) or reduce the output of the RGS whenever:
(i)
BL&P in its sole judgment deems such action necessary to permit
BL&P to construct, install, maintain, repair, replace, remove,
investigate, or inspect any of its equipment or any part of the Grid;
or
(ii)
BL&P
in
its
sole
judgment
determines
that
curtailment,
interruption, or reduction of the Customer-Generator’s electrical
generation is otherwise necessary due to emergencies, forced
outages, a Force Majeure Event, safety hazards, possible damage
to or disturbance of the Grid, or compliance with prudent electrical
practices.
6.2
Notwithstanding the provisions in Clause 6.1 of this Agreement or any other
provision of this Agreement, BL&P shall have the right:
(i)
to require the Customer-Generator to immediately disconnect the
RGS from BL&P’s Grid; and
(ii)
to itself immediately effect the disconnection of the RGS from
BL&P’s Grid if the Customer-Generator is apparently not available
to make the disconnection or if the Customer-Generator is
available but refuses to act and the disconnection is deemed
necessary by BL&P.
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6.3
Whenever feasible BL&P will give the Customer-Generator reasonable advance
notice that interruption or reduction in output from the RGS may be required or
that disconnection of the RGS from BL&P’s Grid may be required. However, the
failure of BL&P to give such notice shall not invalidate any action taken by BL&P
under Clauses 6.1 or 6.2 of this Agreement.
6.4
If BL&P in its discretion deems it necessary to require the Customer-Generator to
interrupt or disconnect the RGS from BL&P’s Grid or for BL&P to itself effect the
interruption or disconnection of the RGS from its Grid, as provided in Clause 6.1
and 6.2 respectively of this Agreement, or such interruption occurs as a result of
suspension or termination of service to the Customer-Generator in accordance
with the provisions of the “Renewable Energy Rider”, then except to the extent
caused by the misconduct or negligent actions of BL&P, its servants or agents,
BL&P and its servants or agents shall not be liable to the Customer-Generator for
any loss or damage whatsoever resulting from the exercise of such rights by
BL&P.
6.5
BL&P shall have the right to enter the Customer-Generator’s premises at the
Service Address at all reasonable hours, without notice to the CustomerGenerator, to inspect the protection devices installed at the RGS and to read,
inspect and test meters, or to effect disconnection of the RGS as provided in
section 6.2 of this Agreement. Nothing in this Agreement shall limit or otherwise
affect any rights of entry to the Customer-Generator’s premises that BL&P may
have under its Standard Electricity Tariff or any other agreement with the
Customer-Generator.
6.6
BL&P reserves the right to disconnect the electricity supply to the Service
Address without notice if the Customer-Generator fails to comply with the
requirements of this Agreement or for any other reason relating to safety and
reliability of the Grid. In so doing, the BL&P will not incur any liability whatsoever
provided that BL&P use reasonable care in the exercise of its functions.
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6.7
BL&P shall have the right to demand, promptly obtain, review and copy the RGS
operations and maintenance records, logs, or any information considered
necessary by BL&P such as unit availability, maintenance outages, circuit
breaker operation requiring manual reset, relay settings and any unusual events
pertaining to the RGS or its interconnection with BL&P’s Grid. In keeping with this
stipulation, the BL&P therefore requires that the Customer-Generator retain and
keep in good order adequate supporting records on the RGS.
6.8
All equipment owned by BL&P which is affixed to the Customer-Generator’s
premises for the purpose of facilitating the interconnection of the CustomerGenerator’s RGS with BL&P’s Grid, including all equipment installed by BL&P
which is required for the purpose of metering and billing, shall remain the
property of BL&P.
7.
METERING AND BILLING
All metering requirements and billing procedures shall be in accordance with this
Agreement, the “Renewable Energy Rider” and any other rate schedules under which
the Customer-Generator is receiving electric service.
8.
SALE AND PURCHASE OF ENERGY
8.1
Sale to BL&P
Commencing on the Operations Date, specified at Item 7 of Schedule A to this
Agreement, the Customer-Generator may sell to BL&P, electricity delivered to
BL&P’s Grid and produced by the RGS at the rate specified in the “Renewable
Energy Rider”.
8.2
Sale to Customer-Generator
BL&P shall make available and sell electricity to the Customer-Generator at the
applicable prevailing tariff for electricity sold to customers.
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8.3
Energy Credit to Customer-Generators
The amount credited by BL&P to the Customer-Generator’s account for the
purchase of energy from the RGS shall be calculated in accordance with the
terms and conditions of the Renewable Energy Rider. Payments due to the
Customer-Generator shall be made in accordance with Clause 9.1 of this
Agreement.
9.
BILLING AND PAYMENT
9.1
Net billing
9.1.1
At the end of each billing period, if the Customer-Generator’s account for
the RGS is in debit after the Energy Credits have been applied, the
balance due will be billed and become payable. If the same CustomerGenerator’s account is in credit, the credit will be carried forward (rolled
over) to the next billing period.
9.1.2
If at the end of each quarter, an Energy Credit of $100.00 or greater
exists on the Customer-Generator’s account, the Customer-Generator will
receive a refund of the Energy Credit by cheque unless otherwise
requested by the Customer-Generator and agreed by BL&P.
9.2
Calculation of Payments.
BL&P's bill to the Customer-Generator (“RGS Bill”) shall include calculations in
reasonable detail of the amounts owed to BL&P with specific reference to the
applicable tariffs and riders.
9.3
Bill Query
9.3.1
The Customer-Generator shall notify BL&P of the nature and basis of any
query that it has with a RGS Bill within three (3) months of the receipt of
the bill.
9.3.2
No query that the Customer-Generator has in connection with a RGS Bill
shall authorize the Customer-Generator to refuse making payments due
to BL&P on or before the due date for the payment.
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9.3.3
BL&P shall investigate all queries reported to it by the CustomerGenerator and shall provide the Customer-Generator with a statement of
its findings on the matters forming the basis of the dispute.
9.3.4
The failure of the Customer-Generator to pay any portion of the RGS Bill
which may be disputed shall constitute a breach of this Agreement.
10.
INTERCONNECTION
The Customer-Generator shall design, construct, install, commission, own, operate and
maintain the RGS and all auxiliary and interconnecting equipment on the CustomerGenerator's side of the Point of Delivery, in accordance with the terms of this Agreement
and the “Requirements for Grid Interconnection of Renewable Generation Systems”.
11.
METERING
11.1
Ownership of Metering System
11.1.1 BL&P shall own, operate and maintain the revenue and production
Metering System used to acquire the measurements from which bills to
the Customer-Generator are calculated pursuant to this Agreement.
BL&P shall also own, operate and maintain production metering for
statistical and analytical purposes where required under the terms of the
Renewable Energy Rider.
11.1.2 The Customer-Generator shall, where required by BL&P, design, finance,
construct, install, own, operate and maintain metering devices for nonrevenue purposes which shall measure and record the total energy
produced by the RGS on at least an hourly basis.
11.2
Location of Meters
All meters shall be installed in a location which is readily accessible at all times to
BL&P’s personnel.
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11.3
Meter Reading
BL&P shall read revenue meters monthly for energy from the RGS supplied to
the Grid by the Customer-Generator and for energy delivered from the Grid to the
Customer-Generator. BL&P shall also read production meters for energy
produced by the RGS both in configurations where BL&P purchases all of the
energy produced by the RGS and otherwise for statistical and analytical
purposes.
12.
COVENANTS
12.1 Customer-Generator’s Covenants
12.1.1 The Customer-Generator covenants that:
(i)
it has complied and will continue to comply with the terms,
conditions
and
obligations
under
this
Agreement,
the
Requirements for Grid Interconnection of Renewable Generation
Systems and the Renewable Energy Rider, as provided for in this
Agreement;
(ii)
it is the owner of the RGS and it is duly authorized to enter into
this Agreement and to operate the RGS;
(iii)
the RGS shall not be used to supply electric energy to a third
party;
(iv)
it shall not tamper with or alter the Metering System; and
(v)
it shall make all payments required to be made by it to BL&P on
or before the due date for the payment.
12.2
BL&P’s Covenants
BL&P covenants that it shall credit payments to the Customer-Generator’s
account as required under this Agreement and pursuant to the terms of the
Renewable Energy Rider.
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13.
DEFAULTS
13.1
Customer-Generator Defaults
BL&P may give a notice of default under this Agreement (a "BL&P Notice of
Default") upon the occurrence of any of the following events (“Events of Default”),
unless caused by a breach by BL&P of this Agreement:
(i)
Abandonment of the operation of the RGS by the CustomerGenerator after the commencement of operation, without the prior
written consent of BL&P;
(ii)
Failure by the Customer-Generator to make any payment required
to be made by it on the due date for the payment in accordance
with the terms of this Agreement.
(iii)
13.2
Any material breach of Clause 12.1
BL&P Defaults
Customer-Generator may give a notice of default under this Agreement (a
"Customer-Generator Notice of Default") upon the occurrence of any of the
following events (“Events of Default”), unless caused by a breach by the
Customer-Generator of this Agreement:
(i)
Any material breach by BL&P of any representation, warranty or
covenant in this Agreement; and
(ii)
14.
On cessation of operations of BL&P.
WAIVER OF DEFAULT
14.1
Effect of waiver
No waiver by either Party of any default by the other Party in the performance of
any of the provisions of this Agreement shall:
(i)
operate or be construed as a waiver of any other or subsequent
default whether similar or not; or
(ii)
be effective unless in writing and duly executed by an authorized
representative of the non-defaulting Party.
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14.2
Indulgences
Neither the failure by the BL&P to insist on any occasion upon the performance
of the terms, conditions or provisions of this Agreement nor the granting of time
or other indulgence by BL&P to the Customer-Generator shall thereby act as a
waiver of any breach or the acceptance of any variation of this Agreement.
15.
REPRESENTATIONS AND WARRANTIES
15.1
The Customer-Generator represents and warrants that:
(i)
it has complied and will continue to comply with the terms,
conditions and obligations under this Agreement;
(ii)
it has obtained and will maintain all required insurance policies
and those policies have been duly endorsed in accordance with
the requirements of this Agreement;
(iii)
it has obtained all required permits, licences and approvals
required
by
all
government
authorities,
local
agencies,
commissions and authorities with jurisdiction over the CustomerGenerator and the RGS to allow it to enter into this Agreement;
(iv)
the RGS meets and will continue to meet all applicable safety and
performance standards that now exists and that BL&P may from
time to time prescribe;
(v)
it is the owner of or rents the premises located at the Service
Address; and
(vi)
it is the owner of the RGS and it is duly authorized to enter into
this Agreement and to operate the RGS.
16.
INDEMNITY
The Customer-Generator shall indemnify and hold harmless the BL&P, its affiliates,
directors, officers, agents and employees from and against any and all losses, liabilities,
costs, claims, charges, actions, proceedings or investigations which BL&P may incur or
which may be made against it in connection with the interconnection of the renewable
energy generating systems with BL&P’s grid or by any breach of any of the warranties of
this Agreement by the Customer-Generator or in respect of the BL&P exercising its
rights, discretions, authorities and obligations under this Agreement. In no event shall
the maximum liability hereunder exceed the value of the insurance policy purchased by
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the Customer-Generator or $100,000 for systems up to 10 kW or $500,000 for systems
larger than 10 kW, whichever is greater.
17.
TERMINATION
17.1
This Agreement will terminate automatically at the end of the term, specified at
Item 8 of Schedule A to this Agreement, unless
(i)
otherwise terminated in accordance with the provisions of Clauses 17.2 or
17.3 of this Agreement; or
(ii)
17.2
otherwise extended by BL&P pursuant to Clause 19 of this Agreement.
Termination by the Customer-Generator
The Customer-Generator may terminate this Agreement by giving BL&P thirty
(30) days prior written notice of its intention to terminate this Agreement;
17.3
Termination by BL&P
BL&P shall have the right to terminate this Agreement:
(i)
where the Customer-Generator is in default of any of its obligations under
this Agreement and the default is not remedied within thirty (30) days
after written notice of the default has been given by BL&P to the
Customer-Generator. BL&P shall exercise its right to terminate this
Agreement for such default by giving ten (10) days written notice of
termination to the Customer-Generator. BL&P’s right to terminate this
Agreement shall not be affected by any rights of suspension, interruption
or disconnection that BL&P may otherwise have under this Agreement;
(ii)
immediately with the termination of the supply of electric service to the
Customer-Generator under any of the rate schedules identified under the
first paragraph of the “Renewable Energy Rider” in Schedule C;
(iii)
18.
immediately and concurrently on termination of this Agreement”.
RESOLUTION OF DISPUTES
18.1
Mutual Discussions
Subject to paragraph 9.3 of this Agreement, if any dispute or difference of any
kind whatsoever arises between the Parties in connection with this Agreement
the Parties shall within three (3) months after the date that the dispute arose
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attempt to settle such dispute in the first instance by mutual discussions between
the Parties.
18.2
Dispute Resolution
In the event that a dispute between the Parties is not settled within thirty (30)
days as provided for in Clause 18.1 of this Agreement the Parties shall attempt to
settle the dispute by alternative means of dispute resolution. Notwithstanding any
provision in this Agreement, BL&P acknowledges that the Customer Generator is
not restricted from seeking relief from the Fair Trading Commission or from the
courts of Barbados.
19.
EXTENSION OF TERM
19.1
The Customer-Generator may apply to BL&P in writing for an extension of the
term at least three (3) months before the Ending Date.
19.2
BL&P may in its sole discretion extend the term of this Agreement under the
same terms and conditions outlined in this Agreement or as modified by BL&P
and for such period as BL&P deems fit.
20.
MISCELLANEOUS PROVISIONS
20.1
No Third Party Beneficiaries.
This Agreement is intended solely for the benefit of the Parties. Nothing in this
Agreement shall be construed to create any duty to, standard of care with
reference to, any liability to, or any right of suit or action in, any person who is not
a Party to this Agreement.
20.2
Variations in Writing
Save and except for an extension of the term provided for under Clause 19 of
this Agreement, any additions, amendments or variations to this Agreement shall
be binding only if they are in writing and signed by a duly authorized
representative of the Parties.
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20.3
Prohibition against Assignment
The Customer-Generator shall not assign this Agreement or any of its rights or
duties hereunder without the prior written consent of BL&P. Any such assignment
or delegation made without BL&P’s written consent shall be null and void.
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SCHEDULES A – D
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SCHEDULE A
PARTICULARS FOR THE AGREEMENT
1.
CUSTOMER-GENERATOR:
ADDRESS OF CUSTOMER-GENERATOR :
2.
LOCATION OF THE RGS:
3.
NAMEPLATE GROSS POWER RATING (KW):
4.
RGS TECHNOLOGY:
_____________________________
5.
POINT OF DELIVERY:
_____________________________
6.
TYPE OF BILLING ARRANGEMENT:
_____________________________
7.
OPERATIONS DATE:
8.
TERM:
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SCHEDULE B
REQUIREMENTS FOR GRID INTERCONNECTION OF RENEWABLE GENERATION
SYSTEM
1.
PURPOSE
This document describes the general provisions and technical requirements for
connecting Renewable Generation Systems (“RGS”) up to 150kW, or larger if approved
in writing by the Barbados Light & Power Company Limited (“BL&P”), to BL&P’s electric
distribution system (“BL&P’s Grid”). These requirements are aimed at, among other
things:
(i) ensuring the compatibility of the RGS with BL&P’s Grid;
(ii) ensuring the safety of the RGS operating in parallel with BL&P’s Grid;
(iii) facilitating the safety of BL&P’s employees, agents, customers and the
general public; and
(iv) maintaining a high standard of power quality.
2.
SUMMARY OF APPLICATION AND INTERCONNECTION PROCESS
2.1
It is recommended that persons desirous of installing the RGS should become
familiar with these requirements for interconnection BEFORE acquiring the RGS.
2.2
Customers may obtain application forms, the Renewable Energy Rider (RER)
Agreement and information on RGS requirements from BL&P offices. This
information
is
also
available
on
BL&P’s
website
at
http://www.blpc.com.bb/cus_servicerider.cfm.
2.3
Before finalising the investment in a Renewable Generation System (RGS) the
Customer-Generator should obtain the appropriate approval for available
capacity from BL&P, either directly or through the potential installer.
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2.4
Before interconnection to BL&P’s Grid can be completed, the CustomerGenerator is required to do the following:
(i)
Understand BL&P’s interconnection requirements before starting the project;
(ii) Submit an “Application for Grid Interconnection for Renewable Energy
Rider” form along with an Electrical One-Line Diagram;
(iii) Ensure a visible lockable AC disconnect is in an accessible location at or
near BL&P’s meter;
(iv) Submit a GEED certificate for the RGS;
(v) Submit a valid certificate of insurance evidencing general liability insurance
coverage;
(vi)
Conform to BL&P’s “Requirement for Grid Interconnection of Renewable
Generation Systems” as evidenced by inspection and approval of the RGS
by authorised BL&P personnel.
(vii) Sign and submit a “Renewable Energy Rider Agreement” (“RER
Agreement”)
(viii) Submit certification documentation from the inverter manufacturer prior to
interconnection to verify that
voltage and frequency ride through
requirements have been satisfied.
(ix) Submit a license issued in accordance with the Electric Light & Power Act
2015 of the laws of Barbados, if warranted.
3.
GENERAL CONDITIONS
Persons desirous of connecting a RGS to BL&P’s Grid must be customers of BL&P and
the power source must be located at the customer’s owned or rented premises.
The RGS must operate in parallel with BL&P’s Grid and offset some or all of the
customer’s own electricity usage.
3.1
Electrical Generation Systems
3.1.1
Unless otherwise approved by BL&P, to be eligible to connect and
operate in parallel with BL&P’s Grid, the RGS must be wind and/or solar
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powered with a maximum aggregate capacity per facility of 1.5 times the
customer’s current average usage up to a maximum of 150kW. The
average usage is normally calculated based on the most recent twelve
months that the customer relied on the grid or the most recent months
where the customer does not have a twelve months history:
(i)
For equivalent RGS capacity- the average monthly
consumption is divided by 150. A multiplier of 1.5 times provides
the maximum allowed capacity up to 150kW. See Table 1.
TABLE 1
Equivalent and Maximum PV system sizes at various monthly average consumption
levels
Average monthly
consumption
over the last year (kWh)
100
Equivalent Capacity
(kW)
Maximum system size
(kW)
0.67
1
200
1.33
2
300
2
3
500
3.33
5
1000
6.67
10
5000
33.33
50
10000
33.67
100
15000
100
150
>15000
>100
150
(ii)
Wind or hybrid – sized to produce 1.5 times the average monthly
consumption, or 150kW, whichever is less.
3.1.2
The RGS may be single phase or three phase but its rated size is limited
to 80% of the size of the main breaker servicing the installation.
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3.2
Application
Customers seeking to interconnect the RGS should submit the “Application For
Grid Interconnection for Renewable Energy Rider” form (the “Application”)
with an Electrical One-Line diagram (see Appendix 1 for sample) specifying all
the components of the RGS to BL&P.
The customer shall also submit to BL&P the remaining documents, as follows,
after acceptance into the RER Program has been permitted and the RGS
installed:
(i)
A certificate for general liability insurance with a minimum
coverage of $100,000 for RGS up to 10kW and $500,000 for RGS
greater than 10kW; and
(ii)
A “GEED” certificate approving the RGS for interconnection to
BL&P’s Grid.
(iii)
3.3
Signed Renewable Energy Rider Agreement
Application Fee
Applicants will be charged a non-refundable application fee of $58.75 (Vat
inclusive).
3.4
Interconnection
3.4.1
Within six (6) weeks of receiving notification from the customer
that the installation has been completed, BL&P will carry out
inspections and tests in accordance with Appendix 6 and will advise
the applicant in writing whether or not the proposed interconnection
of the RGS qualifies for interconnection to BL&P’s Grid. The
Customer-Generator is required to submit certification documentation
from the inverter manufacturer prior to interconnection to verify that
voltage and frequency ride through requirements have been satisfied.
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.
3.4.2
The customer is required to sign the RER Agreement with BL&P prior to
commencement of parallel operation. The RER Agreement outlines the
applicable interconnection standards and requirements for on-going
maintenance and operation and the terms of sale and billing, to allow the
purchase and sale of energy between the customer generator and BL&P.
3.5
Unauthorized Connections
No RGS shall be connected to BL&P’s Grid without permission from BL&P. This
permission will be via the execution of the RER Agreement. For the purposes of
public and utility personnel safety, BL&P reserves the right to disconnect the
service to any customer who connects a RGS to the electrical installation without
the appropriate authorisation from BL&P. Refer to the RER Agreement.
3.6
Metering
BL&P will furnish metering to measure separately the energy supplied from
BL&P’s Grid to the customer and the energy supplied to BL&P’s Grid by the
customer whose RGS has been approved by BL&P (“Customer-Generator”). For
each service interconnected, Customer-Generators must also make provision for
the appropriate meter socket base(s) or other appropriate metering facilities
required to measure the total energy produced by the RGS and energy used by
the Customer-Generator. The required meter(s) will be installed by BL&P. Please
refer to the Metering and Meter Installations section of BL&P’s Information and
Requirements Booklet. All metering locations must be readily accessible to BL&P
personnel for the purposes of maintenance and regular meter reading.
3.6.1
The two metering configurations for grid tied RGSs are as follows:
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METERING CONFIGURATION – 1
Renewable Generating
System
Production meter
PRG
RGS disconnect
switch
Pin
Service main
breaker
Pout
Bidirectional
revenue meter
- utility
Utility source
Customer-Generator’s
load
Key:
PRG - power produced by renewable generating system
Pin – power received from the grid for all loads
Pout – excess power from renewable generating system
to grid
N.B this drawing is intended for illustration purposes only in the application for interconnection
and does not represent a design or installation manual
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METERING CONFIGURATION – 2
Renewable Generating
System
Utility source
Production meter
PRG
RGS disconnect
switch
revenue meter
- utility
Pin
Service main
breaker
Customer-Generator’s load
Key:
PRG power produced by renewable generating
system
Pin – power received from the grid
N.B this drawing is intended for illustration purposes only in the application for interconnection
and does not represent a design or installation manual
For more detailed drawings, refer to Appendix 5, Figs 1 and 2
The “sale of excess” billing arrangement is not available for Customer-Generators
interconnected using metering configuration 2.
3.6.2
A battery backed inverter system is configured such that the inverter falls
directly in the path of the flow of alternating current passing through the
electrical system and has the capability of supplying critical loads when
there is no utility source.
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Three meters are required in this configuration to ensure that the total
RGS production is captured from ACin1 and ACout1. In situations where the
RGS can support the supply of all loads when there is no utility source, a
two meter configuration can be used since all loads will be supplied by
ACout1 and any excess production not stored in batteries will flow directly
to the grid. The two metering configurations for a single battery backed
inverter are provided below respectively.
1. Three meter configuration for supply of critical loads in the absence of the
grid supply.
2. Two meter configuration for supply of all loads in the absence of the grid
supply
Note:
Other meter configurations for grid tied inverters with battery backup may be possible. However
in the interest of safety and adequate metering such configurations must first be approved by
the GEED and the BL&P prior to installation.
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METERING CONFIGURATION FOR BATTERY BACKED INVERTER WITH
CRITICAL LOADS CONNECTED TO THE INVERTER OUTPUT
Sub Breaker
with critical
loads
Meter for
critical loads
ACout1
ACin1
critical loads
PL=PRG-Pout1+Pin1
Renewable
Generating
System with
Battery back up
For Buy All Sell All Billing
Total Consumption= Pin + PRG -Pout
Total Credit= PRG
Pin1
Bidirectional
meter
Pout1
Noncritical
loads
Service Main
Breaker
Panel
Pin
AC
Disconnect
Pout
Bidirectional /
revenue meter
Utility
source
Key:
PRG - power produced by renewable generating system
PRG = PL + Pout1 - Pin1
Pin – power received from the grid for critical and non critical
loads
Pout – excess power from renewable generating system to grid
Pin1 – power received from the grid for critical loads
Pout1 – power from renewable generating system not used
by critical loads
PL – power to critical loads from the grid and RGS
ACin – input terminal of inverter (can also be used for power
export)
ACout – output terminal of inverter
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METERING CONFIGURATION FOR BATTERY BACKED INVERTER WITH ALL
LOADS CONNECTED TO THE INVERTER OUTPUT
Breakers with
all loads
connected
Meter for all
loads
All loads
PL=PRG-Pout+Pin
For Buy All Sell All Billing
Total Consumption= Pin + PRG -Pout
Total Credit= PRG
ACout1
ACin1
Renewable
Generating
System with
Battery back up
Pin
AC
Disconnect
Pout
Bidirectional /
revenue meter
Utility
source
Key:
PRG - power produced by renewable generating system
PRG = PL + Pout - Pin
Pin – power received from the grid for all loads
Pout – excess power from renewable generating system to grid
PL – power to all loads from the grid and RGS
ACin1 – input terminal of inverter (can also be used for power
export)
ACout1 – output terminal of inverter
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3.7
Billing Configuration
Two billing configurations exist within the Renewable Energy Rider (RER)
Program:
(i)
Sale of excess: the RER customer is billed by the BL&P (at the
normal electricity rate) for only what he/she uses from the grid and
will receive a credit for the excess electricity that he/she sells to
the grid (i.e. the electricity generated from his/her RE system that
he/she did not use).
(ii)
Buy all/sell all: the RER customer is billed by BL&P (at the normal
electricity rate) for all the energy consumed, regardless of whether
it is derived from solar PV, wind, and/or the utility, under the RER.
The RER customer will receive a credit on the bill for all the
electricity generated from the RE system at the RER credit rate.
3.7.1
The effective billing arrangement shall be determined by the latest order
of the Fair Trading Commission and is subject to review.
3.8
Labelling
The Customer shall install labelling on or near the meter socket base or manual
AC disconnect. Signs are required to be a minimum of 6 inches in height and 8
inches in width, Font shall be 1.25 inches in height, black in colour with a yellow
background. In the event that the disconnect is in a remote location, an additional
sign must be installed indicating the location of the disconnect. A sample is
shown in Appendix 3. Other labelling may be required by the GEED.
3.9
Insurance
It is the Customer-Generator’s sole responsibility to maintain in effect for the
duration of the Rider Agreement general liability insurance in the amount of not
less than ONE HUNDRED THOUSAND DOLLARS ($100,000.00) for RGS up to
10kW, or not less than FIVE HUNDRED THOUSAND DOLLARS ($500,000.00)
for RGS greater than 10kW. An endorsement on a homeowner’s policy providing
the required amount of coverage is acceptable to meet this insurance
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requirement. The Customer-Generator is required to submit a copy of a valid
certificate of insurance for the RGS. The failure of the Customer-Generator to
renew the insurance coverage will render the Rider Agreement null and void.
BL&P does not accept responsibility for the failure of the Customer-Generator to
renew its insurance policy.
3.10
Liability
The Customer-Generator shall hold harmless and indemnify BL&P and/or its
agents or servants for all loss to third parties resulting from the operation of the
RGS, except when the loss occurs due to the negligent actions of BL&P and/or
its agents or servants. Any liability for loss to third parties resulting from the
operation of the RGS shall not exceed the amount of the Customer-Generator’s
liability insurance or the value of $100,000 for systems up to 10 kW or $500,000
for systems larger than 10 kW, whichever is greater.
The BL&P and/or its agents or servants shall hold harmless and indemnify the
Customer-Generator for all loss to third parties resulting from the operation of
BL&P’s Grid except where BL&P, and/or its agents or servants, has used
reasonable care in the exercise of its functions and when the loss occurs due to
the negligent actions of the Customer-Generator.
3.11
Future Modifications and Expansion
Prior to modifying, expanding or altering the RGS, the Customer-Generator must
obtain written permission from GEED to alter or extend an existing installation.
Thereafter, the Customer-Generator must provide a new Application Form,
revised One-line Diagram, and RER Agreement to seek prior written approval
from BL&P before interconnecting the modified RGS to BL&P’s Grid.
3.12
Renewable Capacity on BL&P Grid
For the overall safety and protection of BL&P’s Grid, the interconnection of all
RGS is limited to a limit approved by the relevant government agency.
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3.13
Customer-owned equipment protection
It is the Customer-Generator’s sole responsibility to protect its facility loads and
generation equipment and comply with the requirements of all appropriate and
relevant standards, codes and local authorities. Please see Appendix 2.
3.14
Additional fees
Customer-Generators may be required to pay BL&P additional fees for services
related to the installation of the RGS. Additional costs payable by the CustomerGenerator to BL&P above and beyond the Application fee, if any, will be costbased.
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Diagram 1 – Flowchart of the Application and Interconnection Process
Customer or his agent
completes and submits RER
application & one-line
diagram of proposed
installation
Customer receives
communication from BL&P
acknowledging application
while under review.
Application is reviewed by
BL&P to ensure it meets
requirements
Customer/ installer and
BL&P agree on application
terms.
Customer/installer informed
of non-conformance to
capacity limits.
Customer awaits Capacity
approval before starting
installation
Capacity
approval
granted?
No
Communication sent to
customer & installer
indicating acceptance
Yes
Installer proceeds with
installation
Customer/installer informs
BL&P of completion of RE
installation
BL&P inspects RE
Installation
GEED inspects installation
BL&P inspection
passed?
Communication sent to
customer to determine need
for RE system and timeline.
No
Installer applies for GEED
certification
Installer rectifies issue and
contacts BL&P
No
Installation complete 3
months after capacity
approval?
Yes
Installer rectifies issue and
arranges for reinspection
Yes
No
yes
Installation passed
GEED inspection?
Application still
required?
Yes
no
Retire application and
communicate to customer.
Installer advised of
outstanding documents
No
RER Contract, GEED
certificate, supplier license
and insurance received by
BL&P?
Yes
Documents reviewed and
contract signed
RGS interconnected to grid
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4.
BL&P OPERATING CONDITIONS
This section describes typical BL&P distribution operating and power quality conditions
within which the RGS should operate. These are representative values that BL&P
attempts to maintain and include some abnormal conditions that the RGS should be
designed to withstand. It is the Customer-Generator’s responsibility to ensure that all
equipment operates correctly in this environment.
4.1
System Voltage
BL&P supplies secondary voltages as stated in the latest revision of the
“Information and Requirements Covering Installation of Electric Services and
Meters”. A voltage tolerance of +/- 6 % is applicable to allow for varying load
conditions as shown in Table 2. Contingencies may arise that cause the voltage
to deviate outside of this tolerance and the RGS must be capable of operating
satisfactorily beyond the extreme voltage level variation limits shown in Table 2.
These extremes of voltage pertain to voltages that may occasionally occur on the
grid during transient events. Table 3 in Section 5 describes the operating
voltages limits for RGSs and expected inverters responses to various voltage
conditions.
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TABLE 2
Nominal system
Voltage variation limits for secondary distribution voltages
voltages
Extreme
Operating
Conditions
Normal Operating Conditions
Single Phase 115/230V
115V
104V
108V
122V
127V
230V
207V
216V
244V
253V
3 Ph 4 wire 115/200V
or 230/400V Wye
115
104V
108V
122V
127V
200
180V
188V
212V
220V
230
207V
216V
244V
253V
400
360V
376V
424V
440V
3 Phase 3 wire
115/230V
115
104V
108V
122V
127V
230
207V
216V
244V
253V
4.2
System Frequency
BL&P’s Grid operates at 50 Hz. Frequency deviations typically range from 49.8 to
50.2 Hz for small contingencies resulting in modest disturbances where the RGS
is expected to remain connected to BL&P’s Grid. For larger contingencies,
broader frequency variations may occur such as when major generation or
transmission is lost and load shedding occurs. The RGS’ required response in
these situations is specified in Table 4.
4.3
Configuration
Single phase 115/230V 50 Hz service is derived from a split-phase transformer
with centre-tapped secondary windings to provide a 3-wire supply comprising two
phase conductors and one grounded neutral conductor.
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4.3.1 Interconnection of grid-synchronous inverters
For split single phase services, due to the configuration of the Grid, a split-phase
transformer is strongly recommended for interconnection of European type 240V
(L - N) 50 Hz single phase inverters. However, some manufacturers state that,
based on their inverter design, the transformer may be excluded. In this event,
BL&P requires that:
(i)
the inverter is equipped with ground fault protection
BL&P will not accept responsibility for any equipment malfunction or damage
arising from the Customer-Generator’s choice of configuration.
4.4
Harmonic Distortion
BL&P uses the IEEE Standard 519 “Recommended Practices and Requirements
for Harmonic Control in Electric Power Systems” which sets out the quality of
power that an electric utility is expected to deliver to the customer at the Point of
Common Coupling (“PCC”) and describes the voltage and current waveforms
that exist throughout the BL&P’s Grid. Transient conditions exceeding the limits
may be encountered. IEEE Standard 519 Section 11.5 recommends that the
voltage distortion limits, as a percentage of the nominal fundamental frequency
voltage in the utility service, should not exceed 5% for the total voltage harmonic
distortion and 3% for any individual harmonic.
4.5
Voltage Imbalance
The voltage imbalance on BL&P’s Grid under normal operating conditions is
typically under 3% but may reach 6%. This imbalance is included in the voltage
variation shown in Table 2. Voltage imbalance is calculated using RMS voltage
levels measured phase to phase at the service entrance under no load
conditions.
Voltage imbalance (%) = 100 x {(Maximum deviation from average voltage)
÷ (average voltage)}
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4.6
Fault and Line Clearing
BL&P may use automatic reclosing to maintain the reliability of BL&P’s Grid. The
owner of the RGS needs to be aware of line reclosing when designing or
purchasing protection schemes to ensure that the RGS responds according to
Tables 3 and 4 before the automatic reclosing of BL&P’s substation breakers.
Grid-tied inverters manufactured to meet the German VDE-AR-N-4105 Standard
“Power Generation Systems Connected to the Low Voltage Distribution Network”
are recommended for this purpose.
5.
TECHNICAL INTERCONNECTION REQUIREMENTS
This section provides the technical requirements to be met by the RGS in order to qualify
for interconnection to BL&P’s Grid and lists typical conditions and response to abnormal
conditions that the RGS is required to meet. The RGS system must comply with the
specific requirements as detailed in this document. RGS systems that conform to the
German VDE-AR-N-4105 Standard - “Power Generation Systems Connected to the Low
Voltage Distribution Network”- or other equivalent standards - with appropriate
adjustments for frequency and voltage ride through as indicated in Tables 3 and 4, are
appropriate for interconnection.
5.1
Point of delivery – Responsibilities
The Point of Delivery must be identified on the renewable system Electrical OneLine Diagram sent with the Application. BL&P will co-ordinate the design,
construction, maintenance and operation of the facilities on the BL&P side of the
Point of Common Coupling. The Customer-Generator is responsible for the
design, construction, maintenance and operation of the facilities on the
Customer-Generator side of the Point of Delivery.
5.2
Point of Disconnection – Safety
A lockable disconnecting device with visible break is required to provide a point
of isolation between the RGS and BL&P’s Grid for safe working purposes. It
should be installed by the Customer-Generator in a visible and accessible
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location near to BL&P’s revenue meter or the Point of Delivery, whichever is
acceptable to BL&P. A sample disconnect switch is shown in Appendix 4.
5.3
Interconnection Grounding
The RGS must be grounded as per the manufacturers’ recommendations and
according to the requirements of the GEED. BL&P provides a grounded neutral
service conductor.
5.4
Interrupting Device Ratings
The design of the RGS must consider the fault current contributions from both
generation sources to ensure that all circuit fault interrupters are adequately
sized.
5.5
Over-current Protection
The RGS must detect and promptly cease to energize for over-current fault
conditions within its system.
5.6
Under-Voltage and Over-Voltage Protection
Every grid-tied RGS shall have under/over-voltage protection and, on detection
of such voltage, shall cease to energize within the timeframe indicated in Table
3. Three phase inverter systems shall detect the individual phase to neutral
voltage on a grounded Wye system or any individual phase to phase voltage on
an ungrounded Wye or delta system for the purposes of Table 3. Single phase
inverter systems shall detect the phase to neutral voltage if connected to the
neutral conductor. Single phase inverter systems connected phase to phase (not
connected to the neutral conductor) shall detect the phase to phase voltage. The
RGS shall not attempt to regulate the voltage or adversely affect the voltage at
the Point of Delivery.
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TABLE 3
Inverter Response to Abnormal Voltage Levels
Range (% of
nom V)
Operating Mode
VRT Duration (s)
Ride
Trip
Through
Reconnect
Criteria (% of nom V)
V > 120
Trip
None
0.20
88%<=V<=110%
110 <V<=120
Ride Through
0.92
1
88%<=V<=110%
90<V<=110
Normal Operation
Indefinite
Indefinite
-
50<V<=90
Ride Through
10-20*
11-21*
88%<=V<=110%
V<50
Trip
None
0.20
88%<=V<=110%
*May be adjusted within these ranges at manufacturer’s discretion
5.7
Under Frequency and Over Frequency Protection
RGS shall cease to energize during over/under frequency conditions within the
maximum delay times shown in Table 4 and shall not reconnect until BL&P’s
Grid has stabilized.
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TABLE 4
Inverter Frequency Operating Limits
Range (Hz)
5.8
Mode
FRT Duration (s)
Ride
Trip
Through
Reconnect
Criteria
(Hz)
f > 53.3
Trip
None
0.20
49.9 <= f <=50.10
52.5<f<=53.
3
Ride Through
20
21
-
47.5<f<=52.
5
Normal
Operation
Indefinite
Indefinit
e
-
46.7<=f<=47
.5
Ride Through
20
21
-
f<46.7
Trip
None
0.20
49.9 <= f <=50.10
Anti-Islanding
For an unintentional island condition, where the RGS energizes a portion of
BL&P’s Grid, the RGS shall detect the island condition and cease to energize
BL&P’s Grid within a maximum of five seconds after the formation of the island.
5.9
Voltage Flicker
Voltage Flicker is an increase or decrease in voltage over a short period of time
and is normally associated with fluctuating loads or motor starting. A Flicker
problem is site-specific and depends on the characteristics of the changes in
load. A Flicker is considered objectionable when it either causes a modulation of
lighting levels sufficient to be irritating to humans or it causes equipment to
malfunction. The RGS shall not cause objectionable Flicker for other customers
on BL&P’s Grid. Refer to IEC Standard EN61000-3-3 (2008) or most recent
version of EN61000-3-3.
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5.10
Harmonic Distortion
RGS are expected to comply with IEEE Standard 519 or IEC 61000-3-2 or
61000-3-4 current distortion limits with regard to harmonic current injection into
BL&P’s Grid. The harmonic current injection arising from the RGS shall not
exceed the values listed in Table 5 – (excluding any harmonic currents
associated with harmonic voltage distortion present on BL&P’s Grid without the
RGS connected). Total current harmonic distortion shall not exceed 5% of rated
current.
TABLE 5
Limits of Maximum Harmonic Current Distortion
Total current harmonic distortion
5.0%
Maximum distortion
5.11
Harmonic Numbers
Even Harmonics
Odd Harmonics
h < 11
1.0%
4.0%
10 < h < 17
0.5%
2.0%
18 < h <23
0.4%
1.5%
24 < h < 35
0.2%
0.6%
h > 35
0.1
0.3%
Voltage Imbalance
When single phase RGS are connected in multiple units and three phase service
is available, then approximately equal amounts of generation capacity should be
applied to each phase of a three phase circuit. Voltage imbalance caused by the
RGS at the point of common coupling is limited to 3 %.
5.12
DC Injection
The RGS shall not inject a DC current greater than 0.5% of the unit’s rated output
current at the Point of Delivery after a period of 6 cycles following connection to
BL&P’s Grid.
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5.13
Synchronization
The RGS that can generate an AC Voltage Waveform independent of BL&P’s
Grid shall be connected in parallel only in combination with its synchronizing
capabilities. The RGS shall synchronize to BL&P’s Grid while meeting the Flicker
requirements of Section 5.9. Synchronization may occur once BL&P’s Grid is
stabilized and in accordance with Tables 3 and 4.
5.13.1 Grid-tied inverters
Grid-tied inverters are required to produce a sine wave output of 50 Hz
frequency, be synchronous with BL&P’s Grid and comply with the
requirements of this document. Note that systems comprising grid-tied
inverters with battery backup are configured differently and are more
complex than battery-less grid-tied systems. In the interest of safety, the
designs of interconnection and meter configurations for battery back-up
grid-tied systems must be approved by GEED and the BL&P prior to
installation.
5.14
Interconnection Protection Function Requirements
5.14.1 The RGS shall incorporate the following protective functions:(i)
AC disconnecting;
(ii)
Anti-Islanding;
(iii)
Automatic synchronizing (inverters with stand-alone capability);
(iv)
Under-voltage trip (on each phase for 3-phase equipment);
(v)
Over-voltage trip (on each phase for 3-phase equipment);
(vi)
Instantaneous over-current trip (on each phase for 3-phase
equipment);
(vii)
Timed over-current trip (on each phase for 3-phase equipment);
(viii)
Under-frequency trip; and
(ix)
Over-frequency trip.
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5.15
Voltage rise
During normal operation, the voltage rise caused by the RGS at the point of
common coupling shall not exceed by 3% the magnitude of the voltage when the
RGS is not connected.
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APPENDIX 1
SAMPLE ELECTRICAL ONE-LINE DIAGRAM
Centre-tapped PV grid-interconnected PV system
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APPENDIX 2
SUMMARY OF PV AND INTERCONNECTION-RELATED TECHNICAL STANDARDS
IEEE Std 928
IEEE Std 1547
IEEE Std 519
IEEE Std 1262
IEEE Std 1374
IEEE Std 1479
UL Std 1741
UL Std 1703
NFPA 70 Article
690 (NEC Code)
NFPA 70 Article
705 (NEC Code)
VDE-AR-N-4105
IEC 61000-3-2
IEC 61000-3-4
Recommended Criteria for Terrestrial PV Power Systems
Standard for Distributed Resources Interconnected with Electric
Power Systems – standard for technical interconnection
requirements
Recommended Practices and Requirements for Harmonic Control in
Electrical Power Systems - standard for allowable harmonic
waveform distortions
Recommended Practice for Qualification of Photovoltaic Modules
Guide for Terrestrial Photovoltaic Power System Safety
Recommended Practice for the Evaluation of Photovoltaic Module
Energy Production
Static Inverters and Charge Controllers for use in PV Power Systems
– a testing protocol that certifies the safe operation of grid-connected
inverters
Flat-Plate Photovoltaic Modules and Panels
Solar Photovoltaic Systems – standard for installation of PV systems
Interconnected Electric Power Production Sources – standard for
installation of grid-connected systems
German Standard “Power Generation Systems Connected to the
Low Voltage Distribution Network
Harmonic current emissions in case of load currents up to 16A
Harmonic current emissions in case of load currents greater than
16A
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APPENDIX 3
SAMPLE OF UTILITY WARNING SIGN OF CUSTOMER GENERATION
(Size not less than 8” x 6”, Font shall be 1.25 inches in height, black in colour with a yellow
background.)
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APPENDIX 4
SAMPLE OF SAFETY DISCONNECT SWITCH
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APPENDIX 5
CONFIGURATIONS
N.B this drawing is intended for illustration purposes only in the application for interconnection
and does not represent a design or installation manual
Fig. 1
Configuration 1 (net production to grid)
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N.B this drawing is intended for illustration purposes only in the application for interconnection
and does not represent a design or installation manual
Fig.2
Configuration 2 – total production to grid
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Configuration of Battery Backed Inverter with Output to Critical Loads
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Configuration of Battery Backed Inverter with All Loads Connected at the Inverter Output
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APPENDIX 6
RGS INTERCONNECTION SITE INSPECTION
Verify size of inverters per application
Verify output frequency of inverter
Verify inverter disconnects in the event of an outage
Verify main breaker size per application
Check whether loads are being metered correctly
Verify bi-directional meter is in place
Check whether meter change is required
Verify a.c. disconnect switch is readily accessible to BL&P personnel
Verify label is in place near the utility disconnect switch
Check whether label is required on utility pole
Verify a.c. disconnect switch is grounded via equipment grounding conductor
Verify a.c. disconnect switch is visibly open
Verify a.c. disconnect switch is properly wired
Verify utility disconnect switch is not a raceway for wiring to other components
Verify a.c. disconnect switch handle can be locked in the OFF position with a BL&P lock
Verify BL&P lock has been placed on utility disconnect switch
Verify utility disconnect switch has not been modified to accommodate the BL&P lock
Verify configuration conforms with Electrical One-line drawing & application
Verify measurement of RGS output is in place via production meter or other means
Note any other discrepancies
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GLOSSARY
Alternating Current (AC): An electric current that reverses its direction at regularly occurring
intervals, known as the frequency which, in the case of Barbados, is 50 times per second.
Automatic Reclosing: This refers to the automatic restoration of power by devices following a
fault. It may involve a sequence of short interruptions before permanent restoration or cessation
of power.
Capacity (gross): The full-load continuous rating of the Renewable Generation System, under
specified conditions, as designated by the manufacturer. It is usually indicated on the nameplate
attached to the equipment.
Customer-Generator: The person or entity accepting responsibility for the electricity account
associated with the Renewable Generation System.
Delta (∆) connection: A method for connecting three phase supply where each phase is
connected in series with the next, separated by a phase rotation of 120 degrees. Compare with
Wye (Y) (star) connection.
Direct Current (DC): An electric current that flows in a constant direction. The magnitude of the
current does not vary or has a very slight variation.
Distribution System:
The local poles, wires, transformers, substations and other equipment used to deliver electricity
to consumers. (See Grid also)
Flicker: Flicker (voltage) is an unsteady visual sensation associated with changing lighting
luminance caused by sudden and repetitive increases or decreases in voltage over a short
period of time. It is normally associated with fluctuating loads or motor starting.
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Frequency Protection (over/under): Use of relays or other devices to protect lines or
equipment by causing circuits to open based on the degree by which the measured frequency
varies from a set value.
Generation (Electricity): The process of producing electric energy from other forms of energy;
also, the amount of electric energy produced, expressed in Watthours (Wh).
Grid: A network for the transmission of electricity throughout a region. The term is also used to
refer to the layout of an electric distribution system.
Grounding: An electrical connection to the earth or a body that extends from an earth
connection for the purposes of safety and voltage reference.
Harmonics: Distortions in the sinusoidal voltage and current waveforms caused by the
overlapping of the fundamental waveform at 50 Hz with other waveforms of integral multiple
frequencies of the fundamental waveform. Total harmonic distortion (THD) is summation of all
the distortions at the various harmonic frequencies.
Hybrid System: A self-generation system that combines multiple power sources (such as solar
and wind) and is located behind a single electric utility service meter. Energy storage systems
such as batteries do not constitute a power source for the purpose of this definition.
Interrupting Device Rating: The highest current that a device is intended to interrupt safely at
rated voltage.
Inverter: A device that converts dc electricity into ac electricity. Some types are used for standalone systems (not connected to the grid) and others are designed as utility-interactive (gridtied) systems to operate in parallel with the utility to supply common loads and may deliver
power to the utility.
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Islanding: Islanding is a condition which occurs when an interconnected Renewable
Generation System continues to energize the facility (and the grid) after a utility power
interruption. Industry practice requires that the Renewable Generation System be disconnected
promptly according to applicable standards to avoid equipment damage and safety hazards to
personnel.
Overcurrent Protection: Use of a device or relay to protect the system by tripping it offline
based on the degree by which the measured current varies from a set value. The trip may be
instantaneous or after a preset time.
Kilowatt (kW): A measure of instantaneous power equal to one thousand Watts of electricity
(See Watt).
Kilowatthour (kWh): A quantity of electricity usage equal to one thousand Watthours.
Manual Disconnect switch: A manual switch required for interconnection to disconnect the
renewable generation source from the utility line.
Net Metering: An arrangement that permits a facility to offset its electrical consumption against
energy delivered by the grid at the retail value and sell power in excess of its local consumption.
Net billing: Arrangement that permits the utility (using two meters or one meter that separately
measures inflows and outflows of electricity) to sell power delivered to the customer at the
prevailing tariff, and buy excess power from the customer’s RGS at a rate contracted by the
utility. The utility issues a net bill for each billing period.
Peak Watt: A manufacturer's unit indicating the amount of power a photovoltaic cell or module
will produce at standard test conditions (normally 1,000 watts per square meter and 25 degrees
Celsius).
Photovoltaic (PV) Cell: An electronic device capable of converting incident light directly into
electricity (direct current)
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Photovoltaic (PV) Module: An integrated assembly of interconnected photovoltaic cells
designed to deliver a selected level of working voltage and current at its output terminals,
packaged for protection against environment degradation, and suited for incorporation in
photovoltaic power systems
Point of Common Coupling: The point where the electrical conductors of the utility’s
distribution system are connected to the customer’s conductors and where any transfer of
electric power between the customer and the distribution system takes place.
Point of Delivery: The point where the Renewable Generation System is electrically connected
to the electric utility for metering purposes.
Point of Disconnection: The point at an accessible location where the disconnect switch used
to isolate the Renewable Generation System from the utility is located.
Renewable Energy: Energy flows that occur naturally and repeatedly in the environment (such
as solar, wind, biomass) and can be harnessed for human benefit.
Renewable Generation System: The total components and subsystems that, in combination,
convert renewable energy into electrical energy suitable for connection to utilisation loads.
Renewable Energy Rider Agreement: A legal document authorizing the flow of electricity
between the facilities of two electric systems. Renewable energy systems must be permanently
interconnected and operating in parallel to the electrical distribution grid of the utility serving the
customer’s electrical load. This agreement also authorises and describes the terms and
conditions under which the purchase and sale of electrical energy between the customer
generator and the BL&P occurs.
Root Mean Square (RMS): Used for AC voltage and current, this quantity equals the square
root of the average of the squares of all the instantaneous values occurring during one cycle. It
is considered as the effective value of AC because, for a fixed resistive load, the AC rms voltage
will produce the same heating effect as a DC voltage of equivalent value.
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Solar Energy: The radiant energy of the sun, which can be converted into other forms of
energy, such as heat or electricity. Sunlight can be converted to electricity directly, as in the
case of photovoltaic (PV) applications or indirectly as in the case of solar thermal applications.
Synchronization: The process of connecting two previously separated ac sources such as the
customer’s private generation system and the utility’s grid, to allow them to operate in parallel
(after matching frequency, voltage, phase angles etc.).
Total Harmonic Distortion (voltage and current): This is a single number representation of
the amount of distortion of a voltage or current electrical waveform from a true sine wave.
Voltage protection (over/under): Use of relays or other devices to protect lines or equipment
by causing circuits to open based on the degree by which the measured voltage varies from a
set value.
Voltage (current) Waveform: The variation of voltage (current) over one cycle indicated by the
pattern which results when the instantaneous value of voltage (current) is plotted with respect to
time over a cycle. Ideally, AC waveforms are represented by sinusoids and DC waveforms are
constant over time.
Watt (Electric): The electrical unit of power represented by the rate of energy transfer of 1
Ampere of electric current flowing under a pressure of 1 Volt at unity Power Factor.
Watthour (Wh): The electrical unit of energy represented by 1 Watt of power supplied to, or
taken from, an electric circuit steadily for 1 hour.
Wind energy: Energy present in wind motion that can be converted to mechanical energy for
driving pumps, mills, and electric power generators.
Wye (Y, star) Connection: A method for connecting three phase supply where each individual
conductor is connected to a common point, which may be grounded or ungrounded. Compare
with delta (∆) connection.
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SCHEDULE C
RENEWABLE ENERGY RIDER (RER)
APPLICATION
This rider is available to customers who qualify for the Domestic Service (DS), Employee
(EMP), General Service (GS), Secondary Voltage Power (SVP), Large Power (LP) and Time-ofUse (TOU) pilot programme customers. All of the provisions of the applicable DS, EMP, GS,
SVP, LP and TOU tariffs will apply except as amended by this rider. This rider is specific to
customers with renewable generation system (hereinafter collectively referred to as “CustomerGenerators” and each as a “Customer-Generator”) utilizing a wind turbine, solar photovoltaic or
hybrid (wind/solar) power source located on the customer’s owned or rented premises.
The Customer-Generator shall have a capacity limit of 1.5 times the customer’s current average
usage up to a maximum capacity of 150 kW. The average usage is calculated based on the
most recent twelve months that the customer relied on the grid or the most recent months where
the customer does not have a twelve months history.
This rider is available on a first-come first-serve basis up to a maximum combined installed
capacity as approved by the appropriate designated authority. The Company reserves the right
to limit the number of services per individual or entity.
This rider is applicable only to the energy produced by the Customer-Generator to the
Company’s electric grid. All other services supplied to the customer will be billed in accordance
with the rates and charges under the customer’s applicable standard tariff. Service under this
rider is conditional on the continuance of service to the customer under one of the applicable
standard tariffs.
CONDITIONS OF SERVICE
The service under this rider will be provided to the entire premises through a single point of
delivery at a single voltage in accordance with the terms of the standard tariff applicable to the
customer. The Customer-Generator must be:
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(1) capable of providing single or three phase voltage at 50 Hz, with its rated output not
exceeding 50% of the Ampere rating of the main breaker of the installation, and
(2) manufactured, installed and operated to meet the Company’s standards for
interconnection as set out in the Company’s “Renewable Energy Rider Agreement” and
the “Requirements for Grid Interconnection of Renewable Generation Systems” and all
applicable Government and industry safety and performance standards.
The Company reserves the right to disconnect the electricity supply to the entire premises to
which the Customer-Generator is connected, without notice and without incurring any liability,
for failure to comply with the requirements of the interconnection greement or for other reasons
relating to safety and reliability.
Provision must be made for the measurement of energy produced by the Customer-Generator
through a meter provided by the Company.
INTERCONNECTION
Before interconnection to BL&P’s Grid can be completed, the Customer-Generator is required
to do the following:
(iv) Understand BL&P’s interconnection requirements before starting the project;
(v) Submit an “Application for Grid Interconnection for Renewable Energy
Rider” form along with an Electrical One-Line Diagram;
(vi) Ensure a visible lockable AC disconnect is in an accessible location at or
near BL&P’s meter;
(x) Submit an “Application for Grid Interconnection” form along with an Electrical
One-Line Diagram;
(xi) Submit a GEED certificate for the RGS;
(xii) Submit a valid certificate of insurance evidencing general liability insurance
coverage;
(xiii) Submit a specification sheet of the inverter showing the product listing;
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(xiv) Sign and submit a “Renewable Energy Rider Agreement” (“RER
Agreement”)
(xv) Submit certification documentation from the inverter manufacturer prior to
interconnection to verify that
voltage and frequency ride through
requirements have been satisfied.
MONTHLY RENEWABLE ENERGY RIDER (RER) CREDIT
All kWh supplied to the grid @ 1.6 times the Fuel Clause Adjustment up to a maximum 1.5
times the customer’s average usage beyond which kWh supplied to the grid @ 1 times the Fuel
Clause Adjustment.
The Fuel Clause Adjustment is calculated according to the Fuel Clause approved by the Fair
Trading Commission and may vary from month to month.
Throughout the term of this Agreement the value of the RER credit shall be determined by the
latest order of the Fair Trading Commission and is subject to review as determined by the Fair
Trading Commission.
BILLING
The Company will utilize a Net Billing with Rolling Credit and Buyback methodology for billing
purposes. At the end of each billing period, if the account is in debit after the renewable energy
credits have been applied, the balance due will be billed and payable. If the account is in credit,
the credit will be carried forward (rolled over) to the next billing period.
If at the end of each quarter, the customer has accumulated a credit greater than or equal to
$100.00, the customer shall be provided with a refund of the credit from the Company.
All new DS, GS, EMP, SVP and LP customers on the RER will be billed under the “buy all/sell
all” billing arrangement with the exception of DS, GS, and EMP customer with a CustomerGenerator capacity of 2 kW or less who will also have the option of the “sale of excess” billing
arrangement. This billing arrangement will remain in place for the duration of the agreement.
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Customer-Generators interconnected before September 1st, 2014 may remain on their current
billing arrangement or exercise the option within 3 months of this date to change to the buy
all/sell all billing arrangement.
METERING CONFIGURATION
The following metering configurations are permitted:
(1) Metering configuration 1 – point of interconnection on the customer’s side of the revenue
meter
(2) Metering configuration 2 – point of interconnection on the grid side of the revenue meter.
Schedule B provides details for the meter configuration for battery backed inverter systems.
The “sale of excess” billing arrangement is not available for Customer-Generators
interconnected using metering configuration 2.
TERMS OF SERVICE
The duration of the agreement between BL&P and the Customer–generator for interconnection
to the grid and purchase of energy shall be offered for a minimum of ten years. The value of the
RER credit shall be subject to review every 3 years or as periodically determined by the Fair
Trading Commission.
RULES & REGULATIONS
Service under this schedule is subject to the orders of the Fair Trading Commission and the
latest publication of the “Information and Requirements Covering Installation of Electric Services
and Meters”. In case of a difference of interpretation between any provision of this schedule
and the “Information and Requirements Covering Installation of Electric Services and Meters”
booklet the provision of this schedule shall be deemed to apply.
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SCHEDULE D
STANDARD ELECTRICITY TARIFFS
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APPENDIX 2
SUMMARY OF PV AND INTERCONNECTION-RELATED TECHNICAL STANDARDS
IEEE Std 928
IEEE Std 1547
IEEE Std 519
IEEE Std 1262
IEEE Std 1374
IEEE Std 1479
UL Std 1741
UL Std 1703
NFPA 70 Article
690 (NEC Code)
NFPA 70 Article
705 (NEC Code)
VDE-AR-N-4105
IEC 61000-3-2
IEC 61000-3-4
Recommended Criteria for Terrestrial PV Power Systems
Standard for Distributed Resources Interconnected with Electric
Power Systems – standard for technical interconnection
requirements
Recommended Practices and Requirements for Harmonic Control in
Electrical Power Systems - standard for allowable harmonic
waveform distortions
Recommended Practice for Qualification of Photovoltaic Modules
Guide for Terrestrial Photovoltaic Power System Safety
Recommended Practice for the Evaluation of Photovoltaic Module
Energy Production
Static Inverters and Charge Controllers for use in PV Power Systems
– a testing protocol that certifies the safe operation of grid-connected
inverters
Flat-Plate Photovoltaic Modules and Panels
Solar Photovoltaic Systems – standard for installation of PV systems
Interconnected Electric Power Production Sources – standard for
installation of grid-connected systems
German Standard “Power Generation Systems Connected to the
Low Voltage Distribution Network
Harmonic current emissions in case of load currents up to 16A
Harmonic current emissions in case of load currents greater than
16A
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APPENDIX 3
SAMPLE OF UTILITY WARNING SIGN OF CUSTOMER GENERATION
(N. B. size not less than 8” x 6”)
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APPENDIX 4
SAMPLE OF SAFETY DISCONNECT SWITCH
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APPENDIX 5
RGS INTERCONNECTION SITE INSPECTION
Verify size of inverters per application
Verify output frequency of inverter
Verify inverter disconnects in the event of an outage
Verify main breaker size per application
Check whether loads are being metered correctly
Verify bi-directional meter is in place
Check whether meter change is required
Verify a.c. disconnect switch is readily accessible to BL&P personnel
Verify label is in place near the utility disconnect switch
Check whether label is required on utility pole
Verify a.c. disconnect switch is grounded via equipment grounding conductor
Verify a.c. disconnect switch is visibly open
Verify a.c. disconnect switch is properly wired
Verify utility disconnect switch is not a raceway for wiring to other components
Verify a.c. disconnect switch handle can be locked in the OFF position with a BL&P lock
Verify BL&P lock has been placed on utility disconnect switch
Verify utility disconnect switch has not been modified to accommodate the BL&P lock
Verify configuration conforms with Electrical One-line drawing & application
Verify measurement of RGS output is in place via production meter or other means
Note any other discrepancies
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