Power System Blockset Release Notes

Elements Library Enhancements

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

• The new 3-Phase Fault block implements a three-phase circuit breaker with external or internal control.
• The new Three-Phase Transformer (Two Windings) and Three-Phase Transformer (Three Windings) blocks implement a three-phase transformer with a configurable phase connection.
• The 3-Phase Breaker block now includes internal and external control.
• You now have the option to specify two and three windings for the Universal Three-Phase Transformer block.
• You now have the option to specify internal or external breaker timing for the Circuit Breaker block.

Power Electronics Library Enhancements

The following new blocks have been added to the powerlib Power Electronics library:

• The Universal Bridge block allows continuous or discrete simulation of the three-phase bridges of diodes, thyristors, IGBT diodes, GTO diodes, or MOSFET diodes.
• The IGBT block implements a semiconductor device controllable by a gate signal.

Machines Library Enhancements

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

• The Steam Turbine and Governor (STG) block and DC Machine block have been added.
• In all three Synchronous Machine blocks, a choice of Rotor type between Salient-pole or Round has been added.
• In both Simplified Synchronous Machine blocks, a choice of Connection type between three or four wires has been added. Use the 3-wire Y option to set the initial conditions with the Powergui dialog, then come back to the 4-wire Y option to simulate transients.
• For both Asynchronous Machine blocks, you can choose a Reference frame for the dq transformation.

Measurements Library Enhancements

The following new block and enhancement have been added to the powerlib Measurements library:

• The Impedance Measurement block has been added (see the Linear Filter and the Single-Phase Line demos).
• You can now use the Multimeter block to measure the voltage, current, and flux of transformers without adding voltage or current measurement blocks (see the Three-Phase Saturable Transformer demo).

Extras/Measurements Library Enhancements

The following new blocks have been added to the powerlib Extras/Measurements library:

• 3-Phase Sequence Analyzer
• Total Harmonic Distortion Measurement
• abc_to_dq0 Transformation
• dq0_to_abc Transformation

Extras/Control Blocks Library Enhancements

The following new blocks have been added to the powerlib Extras/Control Blocks library:

• PWM Generator
• Synchronized 6 Pulse Generator
• Synchronized 12 Pulse Generator

Extras/Discrete Control Blocks Library Enhancements

• Discrete Virtual PLL, Discrete 1-Phase PLL, and Discrete 3-Phase PLL blocks
• Discrete Synchronized 6-Pulse Generator
• Discrete Synchronized 12-Pulse Generator
• Discrete 12-Pulse HVDC Control
• Discrete 3-Phase Programmable Source

Powergui Enhancements

The Power System Blockset 2.1 includes a redesigned Powergui block. You can now:

• Resize the Powergui dialog box windows
• Display phasor magnitude in peak or rms values

New Demos and Improved Documentation

Several new demos have been added to the Demos library. The new demos illustrate multimeters, discretization, and several new blocks. Examples include the Complete 12-Pulse HVDC Transmission System and the Three-Phase Series Compensated Network demos.

The tutorial section of the Power System Blockset User's Guide has been expanded, including new test cases and an explanation of how to customize your blocks.

Power System Blockset 2.1 Release Notes