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Thursday, October 8, 2009

PowerPoint Presentation On Wind Farm

Presentation On Wind Farm


Wind Farm Presentation Transcript:
Sim Power Systems software and other products of the Physical Modeling product family work together with Simulink software to model electrical, mechanical, and control systems.

Introduction Single-Line Diagram SimPowerSystems of the Wind Farm Connected to the Distribution System (power_wind_dfig) SimPowerSystems of the 2 MVA Plant with its Protection System Turbine Data Menu and the Turbine Power Characteristics Turbine Response to a Change in Wind Speed Simulation of a Fault on the 25-kV System Conclusion

The wind farm consists of six 1.5 MW wind turbines connected to a 25 kV distribution system exporting power to a 120 kV grid through a 30 km 25 kV feeder. A 2300V, 2 MVA plant consisting of a motor load (1.68 MW induction motor at 0.93 PF) and of a 200 kW resistive load is connected on the same feeder at bus B25. A 500 kW load is also connected on the 575 V bus of the wind farm. Both the wind turbine and the motor load have a protection system monitoring voltage, current and machine speed.

4. Wind turbines use a doubly-fed induction generator (DFIG) consisting of a wound rotor induction generator and an AC/DC/AC IGBT-based PWM converter. The stator winding is connected directly to the 60 Hz grid while the rotor is fed at variable frequency through the AC/DC/AC converter Another advantage of the DFIG technology is the ability for power electronic converters to generate or absorb reactive power, thus eliminating the need for installing capacitor banks as in the case of squirrel-cage induction generators

The waveforms associated with this simulation. At t=5 s, the generated active power starts increasing smoothly (together with the turbine speed) to reach its rated value of 9MW in approximately 15s. Over that time frame the turbine speed increases from 0.8 p.u. to 1.21 pu. Initially, the pitch angle of the turbine blades is zero degree and the turbine operating point follows the red curve of the turbine power characteristics up to point D. Then the pitch angle is increased from 0 deg to 0.76 deg to limit the mechanical power. Observe also the voltage and the generated reactive power. The reactive power is controlled to maintain a 1 p.u. voltage. At nominal power, the wind turbine absorbs 0.68 Mvar (generated Q=-0.68 Mvar) to control voltage at 1pu. If you change the mode of operation to Var regulation with the Generated reactive power Qref set to zero, you will observe that the voltage increases to 1.021 p.u. when the wind turbine generates its nominal power at unity power factor

6. Simulation and Model-Based Design Simulink is an interactive tool for modeling, simulating, and analyzing dynamic, multidomain systems. It lets you accurately describe, simulate, evaluate, and refine a system's behavior through standard and custom block libraries. Simulink models have ready access to MATLAB, providing you with flexible operation and an extensive range of analysis and design tools.

7. Thanks.

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