Influence of DFIG reactive current injection during a voltage dip on the operation of wind turbine circuit breaker

This paper deals with an issue that has not received much attention in literature. The aim of the study is to investigate the influence of doubly fed induction generator (DFIG) reactive current injection during a voltage dip on the operation of a wind turbine circuit breaker. The study is done using a novel hardware-in-the loop test environment constructed using two real time simulators (dSPACE and RTDS) and commercial protection relay. It is found in this study that the reactive current injection enhances the operation of wind turbine protection since the zero crossing of the circuit breaker currents is achieved earlier. This action may prevent from failed auto reclosing and other safety hazards.