Faulted phase location identification for adjustable speed drives in high resistance grounding system

High Resistance Grounding is preferred in many industrial applications. However, there are some drawbacks for the traditional HRG detection methods to locate a ground fault in Adjustable Speed Drive systems. The existing methods cannot detect or identify which phase faulted once the drive has HRG fault. This paper will present a leakage flux linkage detection based HRG fault identification method to identify the faulted phase of the drive.