Abstract

Power generation from renewable energy source, the wind has grown tremendously and its growth potential is still significant. Unlike conventional sources, due to the unpredictable nature of wind and due to various aerodynamic aspects, the active power generated by wind turbines fluctuates. The power variation causes stability issues because of the fluctuation of the voltage at the point of connection of wind farm. Therefore, power quality issues especially; voltage sag is the major limiting factors for connecting wind farm into power grid, mainly the wind farm with fixed-speed induction generators. This paper investigates the use of a static synchronous compensator (STATCOM) to mitigate the sustained voltage sag of wind farm with fixed speed induction generators. A control strategy which combines negative-sequence voltage feed-forward (NSVFF) control is used to mitigate voltage fluctuation of wind farm. The simulation results show that the STATCOM significantly improves the power quality of wind farm integrated to grid.