Using a DFIG based WECS for voltage regulation at PCC

Voltage regulation at point of common coupling (PCC) using a doubly fed induction generator (DFIG) based wind energy conversion system (WECS) is achieved through reactive power control. WECS produces reactive power when the voltage is less than grid nominal voltage and it consumes it in the opposite case. In this paper a method to achieve this goal is proposed. It consists of controlling the reference value of the vector control system in order to affect the WECS reactive power output. Two situations have been simulated. Sudden voltage increase and decrease were applied to the control system. Satisfying results have been obtained since the voltage at PCC has been restored back to its initial value.