FUZZY BASED ROTOR GROUND FAULT LOCATION METHOD FOR SYNCHRONOUS MACHINES

This paper presents a fuzzy rule based on-line rotor ground fault location method for synchronous machines with static excitation systems, which, combined with rotor ground fault protection, can detect and locate faults in the rotor. Synchronous machine field winding is fed by rectifiers through an excitation transformer. The main contribution of this technique to locate the position of the ground fault in the rotor winding online, reduce the repair time. The system is based on the analysis of the ac and dc components of the excitation voltage and the voltage measured in a grounding resistance located in the neutral terminal of the excitation transformer. This technique has been validated through computer simulations