The research of the inter-turn short circuit of the stator windings in doubly fed induction generator

The doubly fed induction generator (DFIG) is an important component of wind turbine systems. In order to identify incipient faults quickly and ensure safe operation of DFIG, this paper proposes a way to diagnose inter-turn short circuit fault at stator windings, which is based on multi-circuit theory. The mathematical model of DFIG is established in this paper and simulation of DFIG in normal operation and inter-turn short circuit fault at stator windings are carried out. A detail analysis about simulation results is presents, especially about short circuit current. By analysis, the characteristics of inter-turn short circuit fault are obtained.