태양광 발전과 접지를 공유하는 수용가 간 순환전류에 의한 OCGR 트립사례 연구

Distributed power sources are also increasing sharply in line with the government's policy to revitalize renewable energy. Solar power generation, which is a typical distributed power source, is installed and used to save electricity cost and sales in various customers. However, photovoltaic equipment may cause a ground fault overcurrent relay (OCGR) malfunction due to sharing the ground with the customer. This paper is an analysis of OCGR malfunctions caused by circulating currents in a customer installing a solar power facility with grounding based on harmonic directionality.