CONTROL STRATEGIES FOR GENERATOR SIDE CONVERTER OF DIRECT DRIVEN WIND ENERGY CONVERSION SYSTEM [ ]


This paper presents a comparative analysis of different controlling strategies for a direct driven PMSG wind energy power system (WECS) connected to the grid. The DC link voltage is controlled by the generator side converter by using a current mode PWM controller and fixed frequency sliding mode controller (FFSMC). The Grid side converter (GSC) controls the grid active power for maximum power point tracking. The validity of the proposed control schemes has been verified by simulation. The merits of the proposed control scheme are, it does not require the measurement of wind velocity, PMSG stator currents are sinusoidal and power injected into the grid at unity power factor. Modeling of Wind turbine, PMSG, controlling of generator side switch mode converter, controlling of the GSC and Simulation results are presented. Simulation is done in MATLAB/POWERSYSTEM environment.