Three-Phase Asynchronous Wind Turbine Generator

This example shows an induction machine used as a wind turbine generator. The Simple Turbine block converts wind speed to turbine output power by a simple output power versus wind speed characteristic.

When the wind speed is below the cut-in speed or above the cut-out speed, the machine generates zero real power. The machine always consumes reactive power. The Reactive Compensation block offsets the machine's reactive power requirement.

The local load consumes 75kW. The infeed from the power grid meets any wind turbine generation shortfall. When the generator produces more than 75kW, excess power is exported to the grid.

The reactive power compensator is dimensioned to supply 90 kvar when a 440 V phase-to-phase voltage is applied across its terminals.

Model

Simulation Results from Simscape Logging

The plot below shows the input wind speed and output power of the Simple turbine block.

Results from Real-Time Simulation

This example has been tested on these platforms:

• Speedgoat™ Performance real-time target machine with an Intel® 3.5 GHz i7 multi-core CPU and 4 GB RAM.

• dSPACE® SCALEXIO LabBox with Intel® Core XEON E3-1275v3 at 3.5GHz and 4 GB RAM.

You can run this model in real time with a step size of 50 microseconds by using the Simscape local solver. For small sample rates, a task overrun might occur during the initial task execution due to a cold cache. To avoid this overrun, if the selected platform supports these options, relax the start-up behavior by specifying a limited number of task overruns or increasing the sample time of periodic tasks during the start-up phase of the real-time application.