R12 Release Notes

Chapter 34
Power System Blockset 2.1 Release Notes

New Features

This section introduces the new features and enhancements added in the Power System Blockset 2.1 since the Power System Blockset 1.1 (Release 11.0).

Faster Circuit Topology Analysis

The Power System Blockset 2.1 dramatically speeds up circuit topology analysis. This allows your power system simulations to start much more quickly. The Power System Blockset 2.1 can handle larger, more complex models with reduced simulation overhead.

Simulation Enhancements

In addition to the continuous simulation of power systems available in the Power System Blockset 1.1, you can now also discretize your Power System Blockset model, using the fixed-step trapezoidal method (illustrated in the Current Transformer Saturation demo). See the Discrete System block in the Power System Blockset library for more information.

This feature also can dramatically speed up your simulations - especially those with power electronics devices.

Finally, with discretized models, you now have the ability to generate code through the Real-Time Workshop for even more simulation speed.

The forward voltage of discretized power electronic devices (e.g., diode, thyristor, IGBT, and GTO) is now simulated in all cases, including discrete and continuous (with Lon=0).

Measurement Enhancements

The Power System Blockset 2.1 introduces the following measurement enhancements in the powerlib Extras Measurements library:

• You can now use the multimeter to measure the voltage, current, and flux of transformers without adding voltage or current measurement blocks (see the Three-Phase Saturable Transformer demo)
• You can now measure impedance (see the Linear Filter and the Single-Phase Line demos)
• The Power System Blockset 2.1 adds the following new measurement blocks, in the powerlib Elements library:
• 3-Phase Sequence Analyzer
• Total Harmonic Distinction Measurement
• abc_to_dq0 Transformation
• dq_to_abc0 Transformation

Machines Enhancements

The Power System Blockset 2.1 introduces the following enhancements to machines, found in the powerlib Machines library:

• The Steam Turbine and Governor block has been added.
• The DC Machine block has been added.
• For the Synchronous Machine block, a choice for salient pole or round rotor has been added.
• For the Simplified Synchronous Machine block, a choice for two, three, or four wires has been added. Use the three wire option to set the initial conditions with the Powergui load flow, then come back to the four wire option to simulate transients.
• For the Asynchronous Machine block, you can choose whether or not to have a reference frame used for dq transformation.

Upgrading from an Earlier Release

Three-Phase Transformer Blocks Added