A New Algorithm for the Detection of Inter-Turn Stator Faults in Doubly-Fed Wind Generators

Steady state analysis techniques (i.e. Motor Current Signature Analysis) cannot be applied to variable speed wind generators since their operation is predominately in the transient. A new non-stationary fault detection technique is proposed to detect inter-turn stator faults in doubly-fed wind generators. The technique is a combination of the extended Park´s vector approach and a new adaptive algorithm. It will be shown that the new technique can unambiguously detect inter-turn stator faults under transient conditions while providing insight into the degree of severity of the fault