SYSTEMS OF DETECTING GROUND FAULTS IN ENERGY STORAGE AND/OR GENERATION SYSTEMS THAT EMPLOY DC/AC POWER CONVERSION SYSTEMS

摘要

Systems and methods of detecting ground faults in energy storage and/or generation systems. The systems and methods can monitor levels of DC voltages and amplitudes of AC voltages occurring on the positive and negative side of a DC bus with respect to ground on the DC side of the energy storage and/or generation system, and process the monitored DC voltage levels and AC voltage amplitudes to detect a ground fault. Having detected such a ground fault, the systems and methods can generate a warning signal and/or shutdown at least part of the system, for example, by disconnecting a DC energy system from the DC bus, and/or by disabling a DC-to-AC bidirectional inverter included in the system.