Research on Short-Circuit Current Calculation Method of Doubly-Fed Wind Turbines Considering Rotor Dynamic Process

With the enlarging scale of doubly-fed induction generators (DFIGs) connected to power systems, it is important analyze influence a short-circuit current system relay protection. Due correct evaluation protection operation characteristics, DFIG needs be calculated accurately. But research on based following assumption: rotor excitation zero after crowbar put, and its dynamic process ignored. This will bring errors calculation results. paper takes into account dynamics by studying mechanism potential transient change DFIG. The stator flux linkage in event three-phase accurately calculated, an improved RMS method wind turbine short circuit proposed. A physical experiment platform with actual controller fan established, RTDS. It can seen from that proposed this more accurate than those methods ignore process. study lays foundation for further characteristics.