A novel VAR regulation strategy to improve voltage stability of wind farm

A VAR regulation strategy is proposed in this paper to solve VAR and voltage stability caused by wind farm integration. The strategy first calculates VAR demand of the wind farm by deviation of reference voltage and measured voltage of wind farm monitor bus. Then VAR demand will be distributed by equal power factor algorithm to aggregate wind generators and later single wind generator in the wind farm. In this way voltage stability of grid integrated with wind farm can be solved. Wind farm VAR limitation and power factor limitation is also considered in wind farm VAR demand calculation. Steady state stability limit is also proposed in distribution algorithm. Simulation shows strategy proposed can support voltage of monitor bus and restrain voltage fluctuation caused by load power change.