A system for detecting a ground fault in an energy storage and / or generation system using a DC-AC power conversion system

摘要

A method and system for detecting a ground fault in an energy storage and / or generation system is disclosed. The method and system can monitor the amplitude of the AC voltage and the level of the DC voltage occurring on the anode and cathode sides of the DC bus relative to the ground on the DC side of the energy storage and / or generation system, And AC voltage amplitude to detect ground faults. Upon detecting such a ground fault, the disclosed systems and methods may generate an alarm signal and / or disable the DC-AC bidirectional inverter included in the system, for example, by disconnecting the DC energy system from the DC bus and / At least a part of which can be stopped.