System and method for estimating fault resistance to earth faults in rotor windings of synchronous machines

摘要

Estimation method of fault resistance to ground faults in rotor windings of synchronous machines. # The present invention allows the estimation of fault resistance to earth faults in rotor windings of synchronous machines fed by rectifiers connected to a transformer. The method has the advantage of knowing the magnitude of the problem affecting the machine, since the higher the fault resistance, the less the fault current. # The estimate is based mainly on the analysis of harmonic components voltage across the resistor grounding.