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Release Notes for
SimPowerSystems™
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Release Notes for SimPowerSystems™
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Contents
R2013a
Control and measurement blocks automatically configured
based on simulation mode . . . . . . . . . . . . . . . . . . . . . . . .
Supercapacitor block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
power_analyze function that now calculates state-space
matrix based on switch state . . . . . . . . . . . . . . . . . . . . . .
Additional diagnostic controls for SimPowerSystems
models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
3
4
5
6
R2012b
Seven IEEE automatic voltage regulator (AVR) excitation
blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
power_new function that creates new Simulink model with
recommended settings for SimPowerSystems models . .
Optional Simscape mechanical rotational port for
SimPowerSystems electric drives models . . . . . . . . . . . .
Simscape Interface blocks now permitting user-defined
initial conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
power_fftscope function now generating plots directly
from MATLAB command prompt, with additional display
options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
power_lineparam function accessible programmatically . .
SimPowerSystems blocks supporting Simulink Parameter
Objects as dialog box parameters . . . . . . . . . . . . . . . . . . .
8
9
10
11
12
13
14
R2012a
Simscape Rotational Port Available as Mechanical Input for
Machine Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New Setup Function for Permanent Magnet Synchronous
Machine Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
17
iii
Additional Solver Type Option Available for Discrete
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Distributed Resources Library Renamed to Renewable
Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New SimPowerSystems Demos . . . . . . . . . . . . . . . . . . . . . .
18
19
20
R2011b
SimPowerSystems Software Now Requires Simscape
Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interfacing with Simscape Electrical Domains . . . . . . . . . .
Sharing Models Using Simscape Editing Modes . . . . . . . . .
Block Library Links Must Be Resolved . . . . . . . . . . . . . . . .
22
23
24
25
R2011a
New Load Flow Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New Asynchronous Machine Block Setup Function . . . . . .
5-Phase Synchronous Machine Model Available . . . . . . . . .
SimState Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New SimPowerSystems Demo . . . . . . . . . . . . . . . . . . . . . . .
28
29
30
31
32
R2010b
Double Squirrel-Cage Rotor Option Available in
Asynchronous Machine Block . . . . . . . . . . . . . . . . . . . . .
Enhanced Code Generation Capabilities . . . . . . . . . . . . . . .
New SimPowerSystems Demos . . . . . . . . . . . . . . . . . . . . . .
34
35
36
R2010a
Permanent Magnet Model Available in DC Machine Block
...............................................
iv
Contents
38
R2009b
Enhanced power_cableparam Function . . . . . . . . . . . . . . .
Changes to the Fuel Cell Stack Block . . . . . . . . . . . . . . . . .
New SimPowerSystems Demos . . . . . . . . . . . . . . . . . . . . . .
40
41
42
R2009a
Powergui Tools Are Also Available as Standalone
Command-Line Functions . . . . . . . . . . . . . . . . . . . . . . . .
Enhancements to the Ideal Switching Algorithm . . . . . . . .
Powergui Block No Longer Added Automatically . . . . . . . .
Changes to the Battery Block . . . . . . . . . . . . . . . . . . . . . . .
New SimPowerSystems Demos . . . . . . . . . . . . . . . . . . . . . .
44
45
46
47
49
R2008b
New Ideal Switching Algorithm . . . . . . . . . . . . . . . . . . . . . .
Changes to the Universal Bridge Block . . . . . . . . . . . . . . .
New SimPowerSystems Demos . . . . . . . . . . . . . . . . . . . . . .
52
53
54
R2008a
New Fuel Cell Stack Block . . . . . . . . . . . . . . . . . . . . . . . . . .
Initial Conditions Can Be Specified for the Permanent
Magnet Synchronous Machine Block . . . . . . . . . . . . . . .
Multiple Discretization Rates within a Model Now
Available . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New SimPowerSystems Demos . . . . . . . . . . . . . . . . . . . . . .
56
57
58
59
R2007b
New Battery Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
62
v
New Stepper Motor Block . . . . . . . . . . . . . . . . . . . . . . . . . . .
Three New Transformer Blocks . . . . . . . . . . . . . . . . . . . . . .
New Measurement Option Available for the PI Section Line
Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New SimPowerSystems Demos . . . . . . . . . . . . . . . . . . . . . .
Renamed psbhysteresis Command . . . . . . . . . . . . . . . . . .
63
64
65
66
67
R2007a
New Brushless DC Motor Drive Block . . . . . . . . . . . . . . . . .
Automated Conversion of Version 2 Models Is No Longer
Supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New SimPowerSystems Demos . . . . . . . . . . . . . . . . . . . . . .
70
71
72
R2006b
Mechanical Input Parameter Lets You Connect
SimMechanics or SimDriveline Blocks to Electric Drives
by Specifying Motor Speed as Block Input . . . . . . . . . . .
74
R2006a
Average Values of electricdrivelib Blocks . . . . . . . . . . . . . .
Transformer Blocks with SI Units Are Available . . . . . . . .
Open Circuit Option Is Added for the RLC Blocks . . . . . . .
New Demos and Enhancements to Existing Demos . . . . . .
vi
Contents
76
77
78
79
R14SP3
R14SP2+
New Blocks in the Machines Library of powerlib . . . . . . . .
Enhancements to Existing Blocks of the Machines
Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Branch Type Parameter of the RLC Branch Blocks . . . . . .
Average Values of electricdrivelib Blocks . . . . . . . . . . . . . .
Obsolete Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
84
85
86
87
88
R14SP2
vii
viii
Contents
R2013a
Version: 5.8
New Features: Yes
Bug Fixes: Yes
1
R2013a
Control and measurement blocks automatically
configured based on simulation mode
Compatibility Considerations: Yes
A new Control and Measurements library, with 47 new blocks, provides
improved control and measurement blocks for use in power electrical models.
The new library is a restructured and enhanced version of the old Extras
library. All the blocks in the new library have associated block reference
pages that refer to small simulation examples. New design techniques are
used to improve model robustness and efficiency. Compared to the old Extras
library, the new Control and Measurements library eliminates duplicate of
continuous, discrete, and phasor versions of the same block, by merging
them into a single block. These blocks feature a simple mechanism that
automatically configures the block based on simulation mode.
Compatibility Considerations
The Control and Measurements library is intended to replace the Extras
library. The Extras block library is no longer listed in the Library Browser.
It is still available for compatibility purposes, and you can open it by typing
powerlib_extras at the MATLAB® command prompt.
If your legacy models contain blocks from the Extras library, they will
continue to work. However, MathWorks recommends that you use the blocks
from the Control and Measurements library in your new models.
2
Supercapacitor block
Supercapacitor block
The Supercapacitor block in the Electric Drives library implements a generic
model parameterized to represent most popular types of supercapacitor.
The Supercapacitor Model example illustrates a simple hybridization of a
supercapacitor with a battery.
3
R2013a
power_analyze function that now calculates
state-space matrix based on switch state
The power_analyze function now has an option that allows you to compute
ABCD matrices of a given model based of any given switch status vector
provided as an input argument.
4
Additional diagnostic controls for SimPowerSystems™ models
Additional diagnostic controls for SimPowerSystems
models
The Preferences tab of the Powergui block parameters dialog box has been
enhanced to give you better control on what you want to see displayed in
the command window during simulation. The Display SimPowerSystems
warnings and messages check box, available in previous releases, is now
replaced with two new check boxes:
• Disable SimPowerSystems warnings allows you to deactivate all the
warning messages that are displayed when you run a simulation. The
warning messages are displayed by default. Select this check box if you are
aware of the warning and do not want to be bothered by a message on
subsequent simulation runs.
• Display SimPowerSystems compilation messages allows you to
display the compilation messages issued during the analysis of the model.
These messages are not displayed by default.
5
R2013a
New examples
Examples introduced in this version are:
• Loss Calculation in a Three-Phase 3-Level Inverter
• Supercapacitor Model
6
R2012b
Version: 5.7
New Features: Yes
Bug Fixes: Yes
7
R2012b
Seven IEEE automatic voltage regulator (AVR)
excitation blocks
The Machines library now contains a sublibrary, named Excitation Systems,
with seven new blocks. These blocks represent the standard types of IEEE®
AVR excitation systems. For more information, see the block reference pages.
The power_machines example model, which previously used a generic
excitation system, has been updated to use any of the seven models in the
Excitation Systems (AVRlib) library.
8
power_new function that creates new Simulink® model with recommended settings for SimPowerSystems™ models
power_new function that creates new Simulink model
with recommended settings for SimPowerSystems
models
When you type power_new at the MATLAB Command prompt, the software
creates a new model, with the recommended solver ode23tb and with required
Solver Configuration and Powergui blocks already on the canvas. It also
opens the power_new_palette library.
After using power_new, continue developing your model by copying the blocks
from the power_new_palette library, as needed, and adding other blocks
from the Simulink® and Simscape™ libraries.
9
R2012b
Optional Simscape mechanical rotational port for
SimPowerSystems electric drives models
Blocks in the Electric Drives library now have an additional option,
Mechanical rotational port, for the Mechanical input parameter.
When you select this option, the mechanical input port of the block (Tm or w),
changes to a Simscape conserving rotational port S, which you can connect
directly to a mechanical rotational port of a block from Simscape libraries.
Therefore, for example, you can model the mechanical part of your system
using Simscape and SimDriveline™ blocks, and then connect it directly to the
electric drive through the mechanical rotational port S. For details, see the
block reference pages.
10
Simscape™ Interface blocks now permitting user-defined initial conditions
Simscape Interface blocks now permitting
user-defined initial conditions
There are several enhancements to the blocks in the Interface Elements
library that let you connect SimPowerSystems™ and Simscape electrical
circuits:
• Depending on the type of the interface block, you can specify the initial
input and output voltage or current in the filter that is used to break
an algebraic loop between SimPowerSystems and Simscape circuits.
The Current-Voltage Simscape Interface and Current-Voltage Simscape
Interface (gnd) blocks now have an additional Initial Voltage parameter.
The Voltage-Current Simscape Interface and Voltage-Current Simscape
Interface (gnd) blocks have an Initial Current parameter.
• The Filter type parameter in each of these blocks now has two additional
values: First-order input filtering and Second-order input
filtering. These options provide access to the input filtering functionality
in the underlying Simulink-PS Converter block. For more information, see
the Simulink-PS Converter block reference page.
• The block dialog boxes for each of these blocks now have an additional
check box, Show measurement ports. If you select this check box and
click Apply or OK, the block icon displays an additional port m. This is the
output port of the underlying voltage or current sensor, depending on the
type of the interface block. The Current-Voltage Simscape Interface and
Current-Voltage Simscape Interface (gnd) blocks contain a current sensor.
The Voltage-Current Simscape Interface and Voltage-Current Simscape
Interface (gnd) blocks contain a voltage sensor. The output port m provides
access to these measurements.
11
R2012b
power_fftscope function now generating plots directly
from MATLAB command prompt, with additional
display options
You can now use the power_fftscope function directly at the command
line, which provides the ability to automate the use of the tool. The THD
computation has been improved to include the inter-harmonics in the THD
calculations. Two new options are available in the Display style drop-down
list:
• Bar (relative to DC component)
• List (relative to DC component)
For more information, see the power_fftscope reference page.
12
power_lineparam function accessible programmatically
power_lineparam function accessible programmatically
You can now programmatically access a structure variable with default line
geometry parameters, and use it as a template variable to configure a new
line geometry and to compute RLC line parameters.
13
R2012b
SimPowerSystems blocks supporting Simulink
Parameter Objects as dialog box parameters
You can now use Simulink Parameter Objects when entering parameter
values into the block dialog boxes. For more information, see Specify
Parameter Values in the Simulink documentation.
14
R2012a
Version: 5.6
New Features: Yes
Bug Fixes: Yes
15
R2012a
Simscape Rotational Port Available as Mechanical
Input for Machine Blocks
The Mechanical input parameter has a new option, Mechanical
rotational port, which has been added for the following machines:
• Simplified Synchronous Machine
• Synchronous Machine
• Asynchronous Machine
• Single Phase Asynchronous Machine
• DC Machine
• Permanent Magnet Synchronous Machine
When you select this option, the mechanical input port of the block (Tm or w),
changes to a Simscape conserving rotational port S, which you can connect
directly to a mechanical rotational port of a block from Simscape libraries.
This allows you, for example, to model the mechanical part of your system
using Simscape and SimDriveline blocks, and then connect it directly to the
electrical machine through the mechanical rotational port S. See the block
reference pages for details.
16
New Setup Function for Permanent Magnet Synchronous Machine Block
New Setup Function for Permanent Magnet
Synchronous Machine Block
The power_PMSynchronousMachineParams function lets you compute
parameters of a Permanent Magnet Synchronous Machine block based on
standard manufacturer specifications. It lets you input manufacturer data
and returns the computed machine parameters, along with additional derived
data such as synchronous speed, number of pole pairs, nominal slip, starting
torque, and so on. The function also lets you display relative errors between
the input manufacturer data and the equivalent data obtained with the
computed parameters. The function comes with a graphical user interface
that allows you to compute the block parameters and apply it to selected
block, as well as display the detailed results in the Command window.
17
R2012a
Additional Solver Type Option Available for Discrete
Mode
When you set the Simulation type parameter of the Powergui block to
Discrete, the dialog box now contains a new parameter, Solver type, which
lets you select between Tustin and Backward Euler options. Tustin is the
method used in previous versions. It is still the default, therefore there is
no compatibility impact on existing models. If your model shows numerical
oscillations upon simulation in discrete mode, using Backward Euler method
to discretize the state-space matrices may help eliminate the oscillations.
18
Distributed Resources Library Renamed to Renewable Energy
Distributed Resources Library Renamed to Renewable
Energy
The Distributed Resources block library has been renamed, and is now called
Renewable Energy library. All the block names are the same, and there is no
compatibility impact on existing models.
19
R2012a
New SimPowerSystems Demos
The following demos have been added in Version 5.6:
20
Demo Name
Description
Mechanical Coupling of Synchronous
Generator with Exciter System Using the
Simscape Mechanical Rotational Port
(power_SM_exciter_SSC)
This is a modified version of the Mechanical
Coupling of Synchronous Generator with
Exciter System (power_SM_exciter) demo.
It illustrates how using the new Mechanical
rotational port option for mechanical
coupling of an excitation system simplifies the
model.
Initializing a 29-Bus, 7-Power Plant Network
With the Load Flow Tool of Powergui
(power_LFnetwork_29bus)
Illustrates the use of the Load Flow tool of
Powergui to initialize a 29-bus 735 kV network
with detailed modeling of power plants using
hydraulic turbines, speed regulation, excitation
systems, and power system stabilizers.
R2011b
Version: 5.5
New Features: Yes
Bug Fixes: Yes
21
R2011b
SimPowerSystems Software Now Requires Simscape
Product
SimPowerSystems software now depends on and requires Simscape software,
the foundation for Physical Modeling products. Simscape software includes
common Physical Modeling utilities and block libraries. See the Simscape
documentation for details.
SimPowerSystems block libraries are now located under the Simscape node
in the Library Browser.
22
Interfacing with Simscape™ Electrical Domains
Interfacing with Simscape Electrical Domains
Four blocks in the new Interface Elements library allow you to connect a
SimPowerSystems electrical connection line to a Physical Networks line
connected to Simscape blocks. These blocks have SimPowerSystems ports on
one side and Simscape ports on the other, and transfer voltage and current
as Physical Networks Across and Through variables, respectively, without
energy loss.
23
R2011b
Sharing Models Using Simscape Editing Modes
SimPowerSystems software now features a selection of two Simscape editing
modes that allow full or restricted editing of models.
• The Restricted mode requires SimPowerSystems product to be installed,
but does not require a license. It allows you to change a limited set of model
parameters, but not the blocks or connections, in a SimPowerSystems
model.
• The Full mode requires SimPowerSystems product to be installed with a
license. It allows you to change anything in a SimPowerSystems model.
For more details, see About the Simscape Editing Mode .
24
Block Library Links Must Be Resolved
Block Library Links Must Be Resolved
Compatibility Considerations: Yes
All core SimPowerSystems blocks in your models must now have resolved
block library links. You can neither disable nor break these library links.
This is a global Simscape requirement. Consult the Simscape documentation
for further details.
This restriction does not apply to the blocks from Application libraries
(Electric Drives, Distributed Resources, and FACTS) and the Extra library.
Compatibility Considerations
If you have an existing SimPowerSystems model with disabled or broken
links from the blocks in the model to the SimPowerSystems block libraries
(other than the Applications and Extra library), you must restore all the
broken block library links for your model to be valid.
If you have disabled or broken the SimPowerSystems library link for blocks
that you have customized and want to keep these modified blocks in your
model, you must move these modified blocks to your own custom library or
libraries, then copy the block instances that you need to your model.
You must still restore the block link to its parent library, whether that parent
is the SimPowerSystems block library or your own.
Changes to SimPowerSystems Demos
In Version 5.5 (R20011b), demos involving SimPowerSystems plus
other Simscape products have been moved to the File Exchange
(http://www.mathworks.com/matlabcentral/fileexchange). You can retrieve
the demo models by following these links:
Demo Name
File Exchange Location
Fuel Cell Vehicle (FCV) Power
Train
(power_FCV_powertrain)
33309-fuel-cell-vehicle-fcv-power-train
25
R2011b
26
Hybrid Electric Vehicle (HEV)
Power Train
(power_HEV_powertrain)
33310-hybrid-electric-vehicle-hev-power-train-using-battery-model
Electrically-Driven Hydraulic
Motor Pump
(power_Hydraulic_Pump)
33313-electrically-driven-hydraulic-motor-pump
Multi-Level Modeling for Rapid
Prototyping of Complex Systems
(power_HEV_MultiFidelity)
33315-multi-level-modeling-for-rapid-prototyping-of-complex-systems
R2011a
Version: 5.4
New Features: Yes
Bug Fixes: Yes
27
R2011a
New Load Flow Tool
The Load Flow and Machine Initialization tool that was available in
previous releases is renamed Machine Initialization. You can use it to
set initial conditions of three-phase machines and regulators in order to
start simulation in steady-state. The new Load Flow tool now provides an
improved load flow solution for SimPowerSystems models, with several new
features and capabilities:
• The load flow solution uses the Newton-Raphson method. It is more robust
and provides a faster convergence than the Machine Initialization tool.
• The new Load Flow tool comes with a graphical user interface that allows
you to display load flow solution at all buses.
• The Three-Phase Source and Three-Phase Programmable Voltage Source
blocks are now taken into account in the load flow. You can now specify
power and terminal voltage of the Three-Phase Source and Three-Phase
Programmable Voltage Source blocks. Similar to the Synchronous Machine,
you can declare these voltage sources as PV, PQ, or swing type. Once the
load flow is solved, the source internal voltage magnitude and angle are
automatically adjusted.
• You can now specify Three-Phase Series and Parallel RLC Load blocks
either as constant impedance (constant Z) or as constant power (constant
PQ). In the previous tool, the Three-Phase Series and Parallel RLC Load
blocks were only considered as constant impedance loads based on the
nominal voltage and active and reactive powers specified in the block menu.
The Load Flow Bus block has been added to the Measurements library. The
power_loadflow function syntax has been modified, and a new Load Flow
tab has been added to the Powergui block parameters dialog box, as well as
to the dialog boxes of all the blocks considered in the load flow solution. For
more information on using the new Load Flow tool, see Load Flow Tool.
28
New Asynchronous Machine Block Setup Function
New Asynchronous Machine Block Setup Function
The power_AsynchronousMachineParams function lets you compute
parameters of a double-cage Asynchronous Machine block based on standard
manufacturer specifications. It lets you input manufacturer data and returns
the computed machine parameters, along with additional derived data such
as synchronous speed, number of pole pairs, nominal slip, starting torque,
and so on. The function also lets you display relative errors between the
input manufacturer data and the equivalent data obtained with the computed
parameters. The function comes with a graphical user interface that allows
you to compute the block parameters and apply it to selected block, as well as
display the detailed results in the Command window.
29
R2011a
5-Phase Synchronous Machine Model Available
The Permanent Magnet Synchronous Machine block has been modified to
allow modeling a 5-phase synchronous machine with sinusoidal back EMF
and round rotor type. For details, see the block reference page.
30
SimState Support
SimState Support
SimPowerSystems software now supports Simulink SimState feature,
introduced in R2009a. This feature allows you to save all runtime data
necessary for restoring the simulation state of a model. For more information,
see Saving and Restoring the Simulation State as the SimState in the
Simulink User’s Guide.
31
R2011a
New SimPowerSystems Demo
The following demo has been added in Version 5.4:
32
Demo Name
Description
Flickermeter on a Distribution STATCOM
(power_flickermeter)
Flickermeter model designed according to
functional specifications of the international
standard IEC 6100-4-15.
R2010b
Version: 5.3
New Features: Yes
Bug Fixes: Yes
33
R2010b
Double Squirrel-Cage Rotor Option Available in
Asynchronous Machine Block
The Asynchronous Machine block now lets you simulate a double squirrel-cage
rotor. The Rotor type parameter in the block dialog box has a new option,
Double squirrel-cage, in addition to the existing rotor modeling options
of Wound and Squirrel-cage. For more information, see the block reference
page.
34
Enhanced Code Generation Capabilities
Enhanced Code Generation Capabilities
Code generation support has been added for:
• Models in Phasor mode
• Models employing Ideal Switch mode (under Continuous)
For more information, see Improving Simulation Performance.
35
R2010b
New SimPowerSystems Demos
The following demos have been added in Version 5.3:
Demo Name
Description
Synchronous Buck Converter
(power_switching_power_supply)
Illustrates an abstracted version of a
synchronous buck converter that uses ideal
switching to give faster simulation times.
AC3 - Sensorless Field-Oriented Control
Induction Motor Drive
(ac3_sensorless)
Models a sensorless field-oriented control
(FOC) induction motor drive with a braking
chopper for a 200HP AC motor, using a
modified version of the AC3 block.
AC7 - Sensorless Brushless DC Motor Drive
During Speed Regulation
(ac7_sensorless)
Models a sensorless brushless DC motor drive
with a braking chopper for a 3HP motor, using
a modified version of the AC7 block.
Electrically-Driven Hydraulic Motor Pump
(power_Hydraulic_Pump)
Models a hydraulic pump driven by an
electric motor, using SimPowerSystems and
SimHydraulics® blocks.
Note: This demo has been moved to the File
Exchange in Version 5.5 (R20011b).
36
R2010a
Version: 5.2.1
New Features: Yes
Bug Fixes: Yes
37
R2010a
Permanent Magnet Model Available in DC Machine
Block
The DC Machine block now lets you model a permanent magnet DC machine,
parameterized either by torque (torque per current constant) or by back-emf
(voltage per speed constant). A new parameter, Field type, allows you to
select between the wound-field and the permanent magnet DC machine. For
more information, see the block reference page.
38
R2009b
Version: 5.2
New Features: Yes
Bug Fixes: Yes
39
R2009b
Enhanced power_cableparam Function
The power_cableparam function, introduced in Version 5.1 (R2009a) as part
of the Computation of R L and C Cable Parameters (power_cable) demo,
is now available as a standalone command-line function with associated
graphical user interface. It lets you compute RLC parameters of radial copper
cables with single screen, based on conductor and insulator characteristics.
For more information, see the power_cableparam reference page.
40
Changes to the Fuel Cell Stack Block
Changes to the Fuel Cell Stack Block
Compatibility Considerations: Yes
The Fuel Cell Stack block has been improved to better represent the
cell dynamics. The model parameters and the meaning of some detailed
parameters have changed since the last release, as described in the following
section.
Compatibility Considerations
The Fuel Cell Stack block parameters have been changed in Version 5.2
(R2009b). If you used the (No) User-Defined option for the Preset model
parameter in previous releases and defined particular detailed parameters for
your Fuel Cell Stack block, the software will automatically convert your old
block parameters into new values corresponding to the block changes.
The following table compares the old parameter names to the new ones. It
also provides details on how the new values are computed:
Old Parameters
New Parameters and Values
Open circuit voltage
Voltage at 0A and 1A [V_0(V),
V_1(V)]
= [oldvalue, oldvalue*0.95]
41
R2009b
New SimPowerSystems Demos
The following demos have been added in Version 5.2:
Demo Name
Description
Six-Pulse Cycloconverter
(power_cycloconverter)
Illustrates a six-pulse cycloconverter driving
a static load.
Speed Control of a DC Motor Using BJT
H-Bridge
(power_Hbridge)
Illustrates simulation of an H-bridge used to
generate a chopped voltage and control speed
of a DC motor, in open loop, in both directions.
Five-Cell Multi-Level Converter
(power_fivecells)
Illustrates a five-cell multilevel converter
driving a static load.
Multi-Level Modeling for Rapid Prototyping of
Complex Systems
(power_HEV_MultiFidelity)
Illustrates how to use different detail level in
model simulation. For more information, see
Multi-Level Modeling for Rapid Prototyping.
Note: This demo has been moved to the File
Exchange in Version 5.5 (R20011b).
42
R2009a
Version: 5.1
New Features: Yes
Bug Fixes: Yes
43
R2009a
Powergui Tools Are Also Available as Standalone
Command-Line Functions
The graphical user interface analysis tools, available in the Powergui block,
are now also implemented as standalone command-line functions. Each of
these tools can be activated by entering the appropriate command at the
MATLAB prompt. For more information, see the following reference pages:
power_fftscope, power_hysteresis, power_initstates, power_lineparam,
power_loadflow, power_ltiview, power_report, power_steadystate,
power_zmeter.
44
Enhancements to the Ideal Switching Algorithm
Enhancements to the Ideal Switching Algorithm
The Display circuit differential equations option, available in the
Powergui block parameters dialog box, lets you display differential equations
of the model in the command window when the simulation starts. This option
is visible only if Enable use of ideal switching devices is selected. For
more information, see Using the Ideal Switching Device Method.
45
R2009a
Powergui Block No Longer Added Automatically
Compatibility Considerations: Yes
The Powergui block is no longer automatically added to your model upon
simulation. You need to explicitly add it to your model. For more information,
see Using the Powergui Block to Simulate SimPowerSystems Models.
Compatibility Considerations
If you have an old model without a Powergui block, which used to run
in previous releases because Powergui was added automatically during
simulation, you will now get an error trying to simulate it. Add a Powergui
block and save the model to avoid the error.
46
Changes to the Battery Block
Changes to the Battery Block
Compatibility Considerations: Yes
The Battery block has been improved to accurately represent the battery
dynamics during the charge and the discharge processes. The model
parameters and the meaning of some detailed parameters have changed since
the last release, as described in the following section.
Compatibility Considerations
The Battery block parameters have been changed in Version 5.1 (R2009a). If
you used the (No) User-Defined option for the Battery Type parameter in
previous releases and defined particular detailed parameters for your Battery
block, the software will automatically convert your old block parameters into
new values corresponding to the block changes.
The following table compares the old parameter names to the new ones. It
also provides details on how the new values are computed:
Old Parameters
New Parameters and Values
Battery Type, set to
Battery Type, set by default to
(No) User-Defined
Nickel-Metal-Hybrid
-
Maximum Capacity (Ah)
= RatedCapacity*1.05
Full charge voltage (%)
Fully charged voltage (v)
=
[oldvalue]/100*NominalVoltage
Nominal Discharge Current
Nominal Discharge Current (A)
(% of Rated Capacity)
= [oldvalue]/100*RatedCapacity
47
R2009a
Old Parameters
New Parameters and Values
Capacity (% of Rated Capacity)
Capacity (Ah) @ Nominal Voltage
@ Nominal Voltage
= [oldvalue]/100*RatedCapacity
Exponential zone Voltage (%)
Exponential zone Voltage (V)
Exponential zone Capacity
=
[oldvalue]/100*NominalVoltage
(% of the Rated Capacity)
Exponential zone Capacity (Ah)
= [oldvalue]/100*RatedCapacity
48
New SimPowerSystems™ Demos
New SimPowerSystems Demos
The following demos have been added in Version 5.1:
Demo Name
Description
Computation of R L and C Cable Parameters
(power_cable)
Illustrates use of the power_cableparam demo
function to calculate the R,L, and C parameters
of two 132kV 2-phase cables with screen cables.
Single-Phase Dynamic Load Block
(power_1phdynamicload)
Illustrates an example of a single-phase
dynamic load block built with Simulink
blocks. This is the recommended template for
interfacing custom-built Simulink blocks with
SimPowerSystems models.
Zener Diode Regulator
(power_zener)
Presents a model of the zener diode used in a
voltage regulator.
Full Wave Rectifier
(power_FullWaveRectifier)
Illustrates use of the Ideal Switching Device
solution method to simulate a full wave
rectifier using ideal diodes.
Multilevel Multiphase Space-Vector PWM
(power_svpwm_multiPhasesLevel)
Illustrates modeling and operation of the
Multilevel Multiphase Space-Vector PWM
and Two-Level Multiphase Space-Vector
PWM blocks. The demo includes a five-level
five-phase inverter feeding a passive load.
Synchronous Generator and Full Scale
Converter (Type 4) Detailed Model
(power_wind_type_4_det)
Illustrates simulation of a 10 MW wind farm
using a detailed model of a Type 4 wind turbine.
Synchronous Generator and Full Scale
Converter (Type 4) Average Model
(power_wind_type_4_avg)
Illustrates simulation of a 10 MW wind farm
using an average model of a Type 4 wind
turbine.
49
R2008b
Version: 5.0
New Features: Yes
Bug Fixes: Yes
51
R2008b
New Ideal Switching Algorithm
New Ideal Switching algorithm, available in the Powergui block, enables
faster and more accurate simulation of power electronic devices. For more
information, see Using the Ideal Switching Device Method.
52
Changes to the Universal Bridge Block
Changes to the Universal Bridge Block
The Universal Bridge block has two new options for modeling voltage-sourced
converters (VSC):
• Switching-function based VSC
• Average-model based VSC
53
R2008b
New SimPowerSystems Demos
The following demos have been added in Version 5.0:
Demo Name
Description
Switching an Inductive Circuit Using a
Breaker With no Snubber
(power_breaker)
Illustrates the Ideal Switching device solution
method of the Powergui block.
Fuel Cell Vehicle (FCV) Power Train
(power_FCV_powertrain)
Demonstration of a Fuel Cell Vehicle (FCV)
power train using SimPowerSystems and
SimDriveline. The FCV power train is of the
series type. This FCV is propelled by one
electric motor powered by a fuel cell and a
battery.
Note: This demo has been moved to the File
Exchange in Version 5.5 (R20011b).
54
R2008a
Version: 4.6
New Features: Yes
Bug Fixes: Yes
55
R2008a
New Fuel Cell Stack Block
A new block, Fuel Cell Stack, has been added to the Extra Sources sublibrary
of the Electric Drives library. It implements a generic model parameterized to
represent most popular types of fuel cell stacks fed with hydrogen and air.
The 6 kW 45 Vdc Fuel Cell Stack demo (power_fuel_cell) shows how to use
the Fuel Cell Stack block to model a Proton Exchange Membrane (PEM) Fuel
Cell Stack feeding an average value 100Vdc DC/DC converter.
The Battery block from the Electrical Sources library is now included in the
Extra Sources sublibrary of the Electric Drives library as well.
56
Initial Conditions Can Be Specified for the Permanent Magnet Synchronous Machine Block
Initial Conditions Can Be Specified for the Permanent
Magnet Synchronous Machine Block
The following enhancements have been implemented for the Permanent
Magnet Synchronous Machine block:
• A new parameter, Initial conditions, allows you to specify the initial
mechanical speed (rad/s), mechanical angle Θ (degrees) and instantaneous
stator current (A).
• A new drop-down list lets you select the machine constant that you wish to
specify for block parameterization: the flux linkage, the voltage constant,
or the torque constant. Once you select a constant, you can enter its value
in the appropriate parameter field, while the other two parameters become
inaccessible and are only shown for information.
• The dialog box has been rearranged into three tabs, Configuration,
Parameters, and Advanced, to improve usability.
57
R2008a
Multiple Discretization Rates within a Model Now
Available
Compatibility Considerations: Yes
For certain blocks, you can specify a different sample time than the one
specified by the Powergui block. This allows you to discretize different parts of
a model at different rates in a fixed time step simulation. For example, if one
block needs to run at a smaller time step (t1) than the rest of the simulation
(t2), you can speed up simulation of the whole model by specifying a different
time step for this block, as long as t2 = n * t1 (where n is an integer).
The following is a list of blocks that currently can be discretized at a different
rate:
• Asyhchronous Machine
• DC Machine
• Permanent Magnet Synchronous Machine
• Simplified Synchronous Machine
• Single Phase Asynchronous Machine
• Stepper Motor
• Switched Reluctance Motor
• Synchronous Machine
Dialog boxes for most of these blocks have also been rearranged into three
tabs, Configuration, Parameters, and Advanced, to improve usability.
Compatibility Considerations
The DC Machine block can be discretized now. It is recommended that you
use it instead of the Discrete DC Machine block, which will be deprecated
in the future.
58
New SimPowerSystems™ Demos
New SimPowerSystems Demos
The following demos have been added in Version 4.6:
Demo Name
Description
6 kW 45 Vdc Fuel Cell Stack
(power_fuel_cell)
Demonstration of the Proton Exchange
Membrane (PEM) Fuel Cell Stack model
feeding an average value 100Vdc DC/DC
converter. The nominal Fuel Cell Stack voltage
is 45Vdc and the nominal power is 6kW.
Solid-Oxide Fuel Cell Connected to
Three-Phase Electrical Power System
(power_SOFC)
This demo illustrates a model of a solid oxide
fuel cell (SOFC). The system consists of a
SOFC, which is connected to a three-phase
infinite bus through an IGBT inverter.
Mechanical Coupling of Synchronous
Generator with Exciter System
(power_SM_exciter)
In large alternators, the excitation system
is provided by a small synchronous machine
connected on the same shaft as the main
synchronous machine. This demo illustrates
interconnecting two machines on the same
shaft by use of speed input.
Three-Phase Core-Type Transformer
(power_Transfo3phCoreType)
This demo illustrates use of the Three-Phase
Transformer Inductance Matrix Type block
to model a three-phase core-type saturable
transformer. It also demonstrates that using
three single-phase transformers to simulate a
Yg/Yg core-type transformer is not acceptable.
Three-Phase Matrix Converter
(power_three_phase_matrix_converter)
This demo illustrates a three-phase matrix
converter driving a static load. Indirect
space-vector modulation allows direct control
of input current and output voltage and hence
allows the power factor of the source to be
controlled. As a result, the demo outputs the
unity power factor at the source.
Three-Phase Active Harmonic Filter
(power_active_filter)
This demo illustrates the use of a shunt
active harmonic filter (AHF) to minimize the
harmonic content propagated to the source
from a nonlinear load.
59
R2007b
Version: 4.5
New Features: Yes
Bug Fixes: Yes
61
R2007b
New Battery Block
A new block, Battery, has been added to the Electrical Sources library. It
implements a generic battery that models most popular battery types, such
as Nickel-Metal-Hybride, Lead-Acid, Lithium-Ion, and Nickel-Cadmium.
User-Defined Battery type allows you to modify detailed parameters to
represent any particular discharge characteristics.
The Hybrid Electric Vehicle (HEV) Power Train demo
(power_HEV_powertrain), which was introduced in Version 4.4
(R2007a) and shows a multi-domain simulation of a HEV power train based
on SimPowerSystems and SimDriveline blocks, has been modified to use the
Battery block. It is now called Hybrid Electric Vehicle (HEV) Power Train
Using Battery Model.
62
New Stepper Motor Block
New Stepper Motor Block
A new block, Stepper Motor, has been added to the Machines library.
Depending on the motor configuration specified by the Motor type parameter,
this block models:
• A two- or four-phase permanent magnet or hybrid stepper motor
• A three-, four-, or five-phase variable reluctance stepper motor
63
R2007b
Three New Transformer Blocks
Three new transformer blocks have been added to the Elements library:
• Grounding Transformer implements a transformer that is used to provide a
neutral in a three-phase, three-wire system. The transformer consists of
three two-winding transformers connected in a zigzag. The nominal voltage
of each of the six windings is Vn/3.
• Three-Phase Transformer Inductance Matrix Type (Two Windings)
represents inductive coupling between windings located on different phases
of a three-limb or a five-limb core. It also allows modeling of a three-phase
transformer built with three single-phase units (no coupling between
phases). The transformer R L parameters are obtained from no-load
excitation tests and short-circuit tests in positive- and zero-sequence. When
core type is specified as Three-limb or five-limb core, the transformer
is modeled by 9 coupled windings; otherwise, it is modeled by 3 sets of 2
coupled windings (Z0=Z1).
• Three-Phase Transformer Inductance Matrix Type (Three Windings)
represents coupling between windings located on different phases of a
three-limb or a five-limb core. It also allows modeling of a three-phase
transformer built with three single-phase units (no coupling between
phases). The transformer R L parameters are obtained from no-load
excitation tests and short-circuit tests in positive- and zero-sequence. When
core type is specified as Three-limb or five-limb core, the transformer
is modeled by 9 coupled windings; otherwise, it is modeled by 3 sets of 3
coupled windings (Z0=Z1).
64
New Measurement Option Available for the PI Section Line Block
New Measurement Option Available for the PI
Section Line Block
A new measurement option, All pi-section voltages and currents, is
available for the PI Section Line block. It allows you to measure voltages and
currents at the start and end of each pi-section.
65
R2007b
New SimPowerSystems Demos
The following demos have been added in Version 4.5:
66
Demo Name
Description
Ni-MH Battery Model
(power_battery)
Demonstration of the battery model during
charge and discharge process. The demo
models a 200 V, 6.5 Ah Ni-MH battery.
Stepper Motor Drive
(power_steppermotor)
Demonstration of a hybrid stepper motor drive.
The parameters are those of a small stepper
motor (size 23).
D-STATCOM (Average Model)
(power_dstatcom_avg)
In the average model of a Distribution
STATCOM, the IGBT Voltage-Sourced
Converters (VSC) are represented by
equivalent voltage sources generating the
AC voltage averaged over one cycle of the
switching frequency. This model does not
represent harmonics, but the dynamics
resulting from the control system and power
system interaction are preserved. This model
allows using much larger time steps (typically
40-50 microseconds), thus allowing simulations
of several seconds.
D-STATCOM (Detailed Model)
(power_dstatcom_pwm)
The detailed model of a Distribution STATCOM
includes detailed representation of power
electronic IGBT converters. In order to achieve
an acceptable accuracy with the 1680 Hz
switching frequency used in this demo, the
model must be discretized at a relatively small
time step (5 microseconds). This model is well
suited for observing harmonics and control
system dynamic performance over relatively
short periods of times (typically hundreds of
milliseconds to one second).
UPFC (Detailed Model)
(power_upfc_gto48p)
Detailed model of a 48-pulse, GTO-based
Unified Power Flow Controller (500 kV, 100
MVA).
Renamed psbhysteresis Command
Renamed psbhysteresis Command
Compatibility Considerations: Yes
In Version 4.5 (R2007b), power_hysteresis is the new name for the old
psbhysteresis command. You use it exactly the same way you would use
the psbhysteresis command.
Compatibility Considerations
Currently, if you issue the psbhysteresis command, it will automatically
redirect to its new name, power_hysteresis. However, it is recommended
that you update your scripts and use the new command name going forward.
67
R2007a
Version: 4.4
New Features: Yes
Bug Fixes: Yes
69
R2007a
New Brushless DC Motor Drive Block
A new block, Brushless DC Motor Drive, has been added to the Electric
Drives/AC Drives library. It implements a brushless DC motor drive using
a Permanent Magnet Synchronous Motor (PMSM) with trapezoidal back
electromotive force (BEMF). It is possible to use a simplified version of the
drive containing an average-value model of the inverter for faster simulation.
In SimPowerSystems software, the Brushless DC Motor Drive block is
commonly called the AC7 motor drive.
70
Automated Conversion of Version 2 Models Is No Longer Supported
Automated Conversion of Version 2 Models Is No
Longer Supported
Compatibility Considerations: Yes
The automated conversion of old models, created with blocks from
SimPowerSystems 2.3 or Power System Blockset™ 2 libraries, is no longer
supported in Version 4.4 (R2007a).
Compatibility Considerations
The psbupdate function is obsolete as of Version 4.4 (R2007a).
71
R2007a
New SimPowerSystems Demos
The following demos have been added in Version 4.4:
Demo Name
Description
Hybrid Electric Vehicle (HEV) Power Train
(power_HEV_powertrain)
Multi-domain simulation of a HEV power train
based on SimPowerSystems and SimDriveline
blocks. The HEV power train is of the
series-parallel type, such as the one found in
the Toyota Prius car. This HEV has two kinds
of motive power sources, an electric motor and
an internal combustion engine (ICE), in order
to increase the drive train efficiency and reduce
air pollution. It combines the advantages
of the electric motor drive (no pollution and
high available power at low speed) and the
advantages of an internal combustion engine
(high dynamic performances and low pollution
at high speeds).
Note: This demo has been moved to the File
Exchange in Version 5.5 (R20011b).
Aircraft Electrical Power Generation and
Distribution
(power_aircraft_distribution)
72
This circuit illustrates a generic aircraft
Electrical Power Generation & Distribution
System. The AC power frequency is variable
and depends of the engine speed.
R2006b
Version: 4.3
New Features: Yes
Bug Fixes: Yes
73
R2006b
Mechanical Input Parameter Lets You Connect
SimMechanics or SimDriveline Blocks to Electric
Drives by Specifying Motor Speed as Block Input
The AC and DC Electric Drive blocks have a new parameter called
Mechanical input, which lets you specify either the load torque or the motor
speed as block input.
As of V4.3 (R2006b), mechanical input is available for the following blocks:
• Six-Step VSI Induction Motor Drive (AC1)
• Space Vector PWM VSI Induction Motor Drive (AC2)
• Field-Oriented Control Induction Motor Drive (AC3)
• DTC Induction Motor Drive (AC4)
• Self-Controlled Synchronous Motor Drive (AC5)
• PM Synchronous Motor Drive (AC6)
• Two-Quadrant Single-Phase Rectifier DC Drive (DC1)
• Four-Quadrant Single-Phase Rectifier DC Drive (DC2)
• Two-Quadrant Three-Phase Rectifier DC Drive (DC3)
• Four-Quadrant Three-Phase Rectifier DC Drive (DC4)
• One-Quadrant Chopper DC Drive (DC5)
• Two-Quadrant Chopper DC Drive (DC6)
• Four-Quadrant Chopper DC Drive (DC7)
To switch to the motor speed as mechanical input, open the block dialog box
and set the Mechanical input option in the bottom portion of the dialog box
to Speed w. Note that if you select the motor speed as mechanical input, the
internal mechanical system is not used and the inertia and viscous friction
parameters are not displayed. You have to include these parameters in the
external mechanical system.
74
R2006a
Version: 4.2
New Features: Yes
Bug Fixes: Yes
75
R2006a
Average Values of electricdrivelib Blocks
Two more AC drives blocks, AC3 and AC5, in the electricdrivelib library
now have a new parameter that allows you to specify average-value models,
as opposed to detailed models, for the converters. This parameter was
first introduced for some of the electricdrivelib library blocks in V4.1
(R14SP2+).
As of V4.2 (R2006a), average-value models are available for the following
blocks:
• Space Vector PWM VSI Induction Motor Drive (AC2)
• Field-Oriented Control Induction Motor Drive (AC3)
• Self-Controlled Synchronous Motor Drive (AC5)
• PM Synchronous Motor Drive (AC6)
• Two-Quadrant Single-Phase Rectifier DC Drive (DC1)
• Four-Quadrant Single-Phase Rectifier DC Drive (DC2)
• Two-Quadrant Three-Phase Rectifier DC Drive (DC3)
• Four-Quadrant Three-Phase Rectifier DC Drive (DC4)
• One-Quadrant Chopper DC Drive (DC5)
• Two-Quadrant Chopper DC Drive (DC6)
• Four-Quadrant Chopper DC Drive (DC7)
To switch to the average-value representation, open the block dialog box and
set the Model detail level option in the bottom portion of the dialog box
to Average.
76
Transformer Blocks with SI Units Are Available
Transformer Blocks with SI Units Are Available
The Transformer blocks now have a parameter named Units, which allows
you to specify the SI units or the pu units. In addition, this parameter can
be used to automatically convert pu units into SI units, or the reverse.
77
R2006a
Open Circuit Option Is Added for the RLC Blocks
The RLC branch blocks how have an extra option under the Branch Type
parameter that allows you to specify an Open Circuit branch. This is
particularly useful if you want to temporarily get rid of an RLC element in
the circuit without deleting the block.
78
New Demos and Enhancements to Existing Demos
New Demos and Enhancements to Existing Demos
The following demos have been added.
Demo Name
Description
power_tcsc_phasor.mdl
power_tcsc.mdl
Thyristor Controlled Series
Capacitor (TCSC) test systems from
Dr. Dragan Jovcic from University
of Aberdeen, UK
power_asm1ph_auxcontrol
power_asm1ph_vectorcontrol
The single-phase Asynchronous
Machine block using the Main &
auxiliary windings configuration
In the Wind Farm DFIG demos of the Distributed Resources library, control
systems have been enhanced.
79
R14SP3
Version: 4.1.1
New Features: No
Bug Fixes: Yes
81
R14SP2+
Version: 4.1
New Features: Yes
Bug Fixes: Yes
83
R14SP2+
New Blocks in the Machines Library of powerlib
The machines library of powerlib contains a model of a Switched Reluctance
Motor that allow you to model three typical configurations of such a
motor. The library also contains a model of a Single-Phase Asynchronous
Machine that can be configured as a split phase, a capacitor-start, or as a
capacitor-start-run motor mode.
84
Enhancements to Existing Blocks of the Machines Library
Enhancements to Existing Blocks of the Machines
Library
The core saturation can now be specified for the Asynchronous Machine
block when the block is used in a phasor simulation. The saturation model
of the Asynchronous Machine is based on the fundamental component of the
current and does not include the third harmonic. The saturation parameter is
available only when the simulation is in phasor mode. When the Powergui
block is set to continuous or discrete mode, the parameter is disabled in the
mask of the block.
The Permanent Magnet Synchronous Machine block allows you to specify a
trapezoidal flux distribution as an alternative to the sinusoidal flux option
of the previous version of the block.
85
R14SP2+
Branch Type Parameter of the RLC Branch Blocks
The Series RLC Branch block, Parallel RLC Branch block, Three-Phase
Series RLC Branch block, and Three-Phase Parallel RLC Branch block now
have a new parameter that allows you to directly specify the elements that
are present in the branch: the R, L, C, RL, LC, RC, and RLC configurations
can be specified. It is no longer required to specify an Inf value for the
Capacitance in a Series RLC Branch block to get rid of the capacitor device
in the branch or to specify 0 value of resistance to get rid of the resistor of a
Parallel RLC Branch block.
86
Average Values of electricdrivelib Blocks
Average Values of electricdrivelib Blocks
The seven DC drives blocks, and the AC2 and AC6 AC drives of the
electricdrivelib library now have a new parameter that allows you
to specify average value models, as opposed to detailed models, for the
converters.
To switch to the average-value representation, open the block dialog box and
set the Model detail level option in the bottom portion of the dialog box
to Average.
87
R14SP2+
Obsolete Blocks
Compatibility Considerations: Yes
The Discrete System block and the Machine Measurement Demux block are
no longer supported in V4.1 (R14SP2+).
Compatibility Considerations
The table below indicates blocks that are obsolete as of the current version,
and lists blocks that you can use as replacement for the obsolete blocks.
88
Obsolete Block
Removed from Version
Replacement
Discrete System
4.1
Powergui
Machine Measurement
Demux
4.1
Bus Selector
R14SP2
Version: 4.0.1
New Features: No
Bug Fixes: Yes
89
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