SimPowerSystems Release Notes

Chapter 1
SimPowerSystems 2.3 Release Notes

New Features

Note    Previous versions of SimPowerSystems before Release 13 were called Power System Blockset.

This section summarizes the new features and enhancements introduced in SimPowerSystems since Version 2.2 (Release 12.1).

If you are upgrading from a release earlier than Release 12.1, then you should also see New Features in the Power System Blockset 2.2 Release Notes.

Simulation Enhancements

The SimPowerSystems 2.3 enables you to simulate almost any circuit with the phasor simulation feature. The simulation time is reduced dramatically with this method (the differential equations representing the network are replaced by a set of algebraic equations at a fixed frequency). The phasor simulation facilitates transient stability studies of multimachine systems. The Transient Stability of 2 Machines demo illustrates a phasor simulation.

Electrical Sources Library Enhancements

The 3-Phase Programmable Voltage Source block has been moved to the Electrical Sources library. This block implements a three-phase voltage source, with programmable time variation for the amplitude, phase, and frequency of the fundamental frequency, and two superposable harmonics.

Elements Library Enhancements

The following new blocks and enhancements have been added to the Elements library:

• The 3-Phase Dynamic Load block implements a three-phase dynamic load where the active power and reactive power can be programmed or controlled by external Simulink signals.
• The Zigzag Phase-Shifting Transformer block implements a three-phase transformer where you can specify the phase angle and phase shift.
• You can activate an optional hysteresis characteristic in the Saturable Transformer, Three-Phase Transformer (Two-Windings), and Three-Phase Transformer (Three-Windings) blocks.

Power Electronics Library Enhancements

The Three-Level Bridge block has been added to the Power Electronics library. You can use this block to model complex converter configurations

Machines Library Enhancements

The following new blocks and enhancements have been added to the Machines library:

• The Generic Power System Stabilizer and Multiband Power System Stabilizer blocks
• Four new measurements have been added to the Machine Measurement Demux block for use with the Synchronous Machine block. See Synchronous Machine Block Output for a possible associated upgrade issue.

Extras Library Enhancements

The Static Var Compensator block has been added for use with the phasor solution in the Phasor Library.

Powergui Enhancements

The Powergui block features these new tools and enhancements:

• The Powergui block now replaces the old Discrete System block that was used in the previous versions to discretize models. The Discrete System block is still in the library for backward compatibility.
• The Phasor simulation feature is activated directly from the Powergui dialog. You specify in the dialog the frequency used during the simulation.
• The Impedance vs Frequency Measurement tool now displays the Bode plots directly in the Powergui dialog in order to limit the number of windows.
• The FFT Analysis tool is now available in the Powergui dialog. New parameters have been added to refine the calculations.
• A Hysteresis Design tool has been added to enable you to define and edit any hysteresis characteristics for use with the Saturable Transformer block.

SimPowerSystems Release Notes

Major Bug Fixes