Flicker Mitigation for Variable Speed Wind Generating System

Due to the variations wind speed variation, wind shear and tower shadow effects, grid connected wind generating systems are the sources of power which may produce fiicker during continuous operation. This paper presents a model of an high-level variable- speed wind turbine with a generator to investigate the fiicker emission and mitigation issues. An individual pitch control (IPC) strategy is proposed to reduce the flicker emission at different wind speed conditions. The IPC scheme is proposed and the individual pitch controller is designed according to the generator active power and the azimuth angle of the wind turbine. The simulations are performed on the Simulation results show that damping the generator active power by IPC is an effective means for flicker mitigation of variable speed wind generation during continuous operation.