Design of Three-Phase Stand-Alone PV Generation System with Unbalanced Loads

A three-phase stand-alone PV generation system with unbalanced loads is designed in this paper. The main circuit topology of half-bridge inverter is adopted. Through a LC filter and transformer, local loads are supplied. After analyzing the produce reason of unbalanced voltage, a simple control strategy based voltage single loop is proposed, which makes the three-phase stand-alone PV generation system have the ability against unbalanced loads. Finally a 10kVA prototype is established in laboratory to verify the feasibility of this scheme.