| Version 4.6 (R2008a) SimPowerSystems™ Software Release Notes | |
This table summarizes what's new in Version 4.6 (R2008a):
| New Features and Changes | Version Compatibility Considerations | Fixed Bugs and Known Problems | Related Documentation at Web Site |
|---|---|---|---|
Yes | Yes—Details labeled as Compatibility Considerations within descriptions of new features and changes, below. See also Summary. | Bug
Reports | No |
New features and changes introduced in this version are
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.
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.
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.
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.
The following demos have been added in Version 4.6:
Demo Name | Description |
6 kW 45 Vdc Fuel Cell Stack | 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 | 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 | 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 | 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 | 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 | 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. |
| Version 5.0 (R2008b) SimPowerSystems Software | Version 4.5 (R2007b) SimPowerSystems Software | |
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