Compact Automatic Voltage Regulator for small synchronous

Compact Automatic Voltage Regulator for small synchronous
Compact Automatic Voltage Regulator for
small synchronous machines
UNITROL® 1000-7
Copyright © 2000 Photodisc, Inc.
Applications of UNITROL® 1000-7
UNITROL 1000-7 is the latest and most compact member in the UNITROL 1000 Family of Automatic
Voltage Regulators. Its smart mechanical design together with modern digital signal processing
technology guarantees excellent performance also under harsh environmental conditions. The
unit complies with relevant EN, ANSI, UL and CSA norms.
Superior reliability
UNITROL 1000-7 consists of a single printed circuit board
equipped with all elements of the control as well as the
power electronics. This board is attached to an effective
heat sink which cools the power components. The surface
of the board is casted in polyurethane, which makes the
mechanical structure extremely robust and resistant to
mechanical stress and dusty environments. This design
guarantees excellent performance and reliability at reasonable prices.
UNITROL 1000-7 for field current up to 7 A in
70° C ambient temperature
Adaptation to customer needs
The powerful signal processor has significant spare
capacity to handle additional functionality required by
a machine manufacturer. Even small hardware changes
can be considered.
Powerful DSP ensures fast and precise
voltage control
UNITROL 1000-7 can be used in a vast variety of applications. It can be supplied from an AC or DC power source.
Two typical applications are illustrated here.
Shunt excitation with optional short circuit support
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Generator excitation with Permanent Magnet
Generator (PMG) supply
UNITROL® 1000-7 Performance Features
The highly efficient software of the UNITROL 1000 fulfills all requirements for the stable and reliable operation of your synchronous machine.
Standard functions (BASIC)
• Voltage regulator with PID control algorithm
• Cos ϕ regulator with PID control algorithm
• Reactive power regulator with PID control algorithm
• Excitation current regulator (manual control) with PI
control algorithm
• Open loop control of output voltage for test purpose
• Internal digital reference values
• Bumpless changeover for all modes of operation
• Soft-start function
• Reactive current droop for network operation
• Volts-per-Hertz limiter
• Minimum excitation current limiter
• Three-step delayed maximum excitation current
limiter (temperature dependent)
• Reactive current limiter as a function of active
power (P/Q)
• Stator voltage limiter
• Stator current limiter (temperature dependent)
• Reactive power sharing between parallel machines by
RS 485 bus
• Voltage matching prior to synchronizing
• Standard Modbus RTU interface on RS 232 and RS 485
• Undervoltage detection to activate external current
boost for short circuit support (compounding)
• Built-in step test function
• Alarm and Trip signals
Optional functions
• Automatic synchronizing
• Synchrocheck function
• Monitoring of rotating diodes
• Power System Stabilizer, acc. to IEEE
• Enhanced monitoring functions for
redundant system, like PT monitoring
• Set point following based on CAN for
redundant systems
• Stand-by mode for redundant backup
channel system
The terminals are modern tension spring type by
default but also Faston connectors are available
Inputs and outputs
The UNITROL 1000-7 is equipped with flexible
• 4
• 4
• 3
• 2
digital inputs
digital outputs (or inputs)
analog inputs
analog outputs
The four digital outputs can be individually
redefined as digital inputs.
Fbias = fnet,nom -fnet,act
CB: Circuit breaker
A built-in synchronizing function parallels the
generator with the line
An RS 232 serial interface is used for PC connection (CMT 1000).
An optional RS 485 link can be used for Modbus serial communication or for reactive power
sharing (up to 32 parallel units).
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Easy commissioning with CMT 1000
CMT 1000 is a user-friendly Commissioning and Maintenance Tool for the UNITROL 1000 Family.
Easy to operate
The most important status information is available on
the board. To get detailed information, a laptop with
the CMT 1000 tool installed needs to be connected.
LEDs on the board
Simple tuning
All the parameter settings for the
UNITROL 1000 Family can be performed
using CMT 1000, Commissioning and Maintenance Tool, for Microsoft® Windows™.
It is easy to see how the changing of a
parameter affects the overall behavior of the
regulator by referring to the power chart and
oscilloscope function. This means that the
optimum settings are found within a short
time. A program for tuning aid is provided.
Screenshot of CMT 1000 Oscilloscope
Typically, the UNITROL 1000-7 is preset
during machine testing and the site personnel
only need to verify the correct operation.
CMT 1000 Oscilloscope
• Four signals can be selected for graphic
• The resolution of the oscilloscope is
50 ms, and a total of 20 channels are
• Parameter files and graphs can be saved
in numerical form for later analysis
The power chart shows the actual operating point and the setting
curves of the P/Q limiter
Page 4
The digital inputs and outputs can be configured
according to requirements
Technical Data of UNITROL® 1000-7
Power electronics supply
AC input voltage 3-ph min/max
AC input voltage 1-ph min/max
DC input voltage min/max
Frequency range 3-ph
Frequency range 1-ph
Test voltage
Ambient values
9 to 250 VAC
30 to 250 VAC
16 to 300 VDC
up to 600 Hz
40 to 600 Hz
2 kV
Measurement inputs
Generator voltage 3-ph
Generator current 1-ph
Network voltage 1-ph
Frequency range
max. 500 V
1 A and 5 A
max. 500 V
10 to 100 Hz
7 A DC
14 A DC
9 A DC
– 40 to + 70 °C
– 40 to + 85 °C
IEC 60068-2-6 Class 2
IEC 60255-21-2 Class 2
IEC 60255-21-3 Class 2
EMC withstand
EN 61000-6-2
EN 61000-6-4
UL Certification (pending)
UL 508
Mechanical data
Protection class
Excitation output
at 70 °C ambient temperature
Continuous output current
Overload (10 s maximum)
Overload (4 min maximum)
Operating temperature range
Storage temperature range
Shock and bump
1.7 kg
open frame
Dimensions (in mm)
Internal voltage source
Auxiliary voltage source
Maximum output current
24 VDC
300 mA
Analog inputs/outputs
Voltage range
Reference source for external potentiometer
± 10 V
300 kOhm
± 10 V
Serial interface
For PC connection
For paralleling of several devices
For local extension devices
RS 232
RS 485 (optional)
CAN bus (optional)
Voltage regulation
< 0.2 %
Learn to operate UNITROL® 1000 via E-Learning !
The interactive training program provides a comprehensive guide to installation and operation
of the UNITROL 1000 voltage regulator.
More information about this program can be found on our Website in the
product’s “Downloads” section.
Please use the “Contact us” section to order the UNITROL 1000 E-Learning program on CD.
Page 5
Products of the UNITROL® 1000 Family
UNITROL® 1000 Family is a series of digital Automatic Voltage Regulators. A modern controller design
together with IGBT chopper power stage enables them to be used in a large variety of applications.
UNITROL 1000-7
UNITROL 1000-15
UNITROL 1000-7 is an AVR for
maximum 7 A continuous field
current. It is targeted at synchronous machine manufacturers and
system integrators who look for
a straight-forward and costeffective solution.
UNITROL 1000-15 is an AVR with
field current up to 15 A. A local
operation panel serves for easy
monitoring and parameter settings.
This compact and easily operated
unit covers a wide range of
UNITROL 1000-PM40 is the power
module extending the output
current of the UNITROL 1000-15
up to 40 A. A CAN bus interface
between the two units is used
for this plug&play combination,
UNITROL 1000-40.
3BHT 490 478 R0201
ABB Switzerland Ltd
Static Excitation Systems, Voltage Regulators
and Synchronizing Equipment
CH-5300 Turgi / Switzerland
Telephone: +41 (0) 58 589 24 86
+41 (0) 58 589 23 33
[email protected]
Internet: /unitrol
© Copyright 2004-2010 ABB. All rights reserved.
Specifications subject to change without notice.
ABB Switzerland Ltd in Turgi, Switzerland, is the worldwide Center of Excellence for Excitation and Synchronizing Systems
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