Patent ID: 8405940
Filing Date: 2013-03-26
Classification: H02H

Abstract:
1. A generator winding-to-ground fault detection system, comprising: a first signal injection source in electrical communication with a first winding of a first electric power generator via a first injection transformer, the first signal injection source comprising a first signal generator for generating a first injection signal capable of being injected to the first winding using the first injection transformer, the first winding being coupled to ground via a first path; and a protection module in communication with the first signal injection source and the first electric power generator, the protection module configured to receive the first injection signal and a signal relating to the current through the first path and to determine the occurrence of a winding-to-ground fault condition based at least in part on the first injection signal and the signal relating to the current through the first path, wherein the first injection signal is configured to enable the protection module to differentiate the first injection signal from signals resulting from normal operation of the first electric power generator.