Decentralized Suppression Strategy of Common Ground Circulating Current Caused by Grounding Fault in PV Modules in Single-Phase PV Grid-Connected Systems

The complicated series-parallel wiring and aged insulation of photovoltaic (PV) power plants leave the system prone to PV grounding faults. The resultant common ground circulating current will increase the operation stress of the switching devices and jeopardize system stability. To address these problems, a comprehensive decentralized control strategy is proposed in this paper to suppress the cir...