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| R2012a Documentation → SimPowerSystems | |
Learn more about SimPowerSystems |
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| Contents | Index |
This table summarizes what's new in Version 5.4 (R2011a):
| New Features and Changes | Version Compatibility Considerations | Fixed Bugs and Known Problems |
|---|---|---|
Yes | No | Bug
Reports |
New features and changes introduced in this version are described here:
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.
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.
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.
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.
The following demo has been added in Version 5.4:
Demo Name | Description |
Flickermeter on a Distribution STATCOM | Flickermeter model designed according to functional specifications of the international standard IEC 6100-4-15. |
 | Version 5.5 (R2011b) SimPowerSystems Software | Version 5.3 (R2010b) SimPowerSystems Software |  |
Learn more about Simulink through this collection of videos, articles, technical literature and the Getting Started with Simulink Guide.
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