Modelling and Simulation Result of a Permanent Magnet Synchronous Generator of Wind Turbine System
As a result of wind speed intermittency, wind turbine output power can be highly variable. The large variability in output power can adversely impact local loads that are sensitive to pulsating power. To mitigate large swings in power, the wind turbine output power can be smoothed by using a small energy buffer. A power conditioner is proposed to smooth the wind power output by utilizing the energy of an ultra capacitor. The conditioner is based on a single phase voltage source inverter (VSI) connected between the grid interconnection point and the ultra capacitor. The shunt VSI injects or absorbs active power from the line to smooth the wind power output by utilizing the short term storage capabilities of the ultra capacitor. The ultra capacitor is connected to the DC link through a DC-DC converter. The bidirectional DC-DC converter acts in buck mode during discharge and in boost mode during charging to maintain the voltage of the DC link relatively constant to provide good controllability of the VSI. The control strategies for the conditioner are presented in this thesis.
Sibdas Mondal, Sk. Rabiul Hossain,Bijay Kumar Mudi,Prof. Gautam Kumar Panda, Prof. Pradip Kumar Saha