3 PCU 3 PCU APPARATUS FOR DETECTING GROUND FAULT OF THREE PHASE PHOTOVOLTAIC PCU AND METHOD FOR DETECTING GROUND FAULT OF THREE PHASE PHOTOVOLTAIC PCU

摘要

The present invention relates to a ground fault detector for a three-phase solar PCU and a ground fault detection method for a three-phase solar PCU. More specifically, in order to solve the limitations of the prior art, Phase sunlight can be detected by detecting the ground fault in the system by detecting the voltage of the solar PCU and detecting the ground fault without including an additional detecting device such as the ELCB and simplifying the design of the solar PCU, A ground fault detector of a PCU and a ground fault detection method of a three-phase solar PCU.