Abstract

Distributed parallel inverter is one of the broad application prospects in varied inverters parallel modes. the distributed parallel inverter control mode that based on proportional resonant(P.R) control was given, the advantage and defect were described in this parallel control mode. Then the concept of the circulation impedance was put forward. The circulation characteristics was analyzed, and measures to reduce the circulation were proposed. Simulation results show that the circular current impedance would be increased and circular current impedance would be restrained outstandingly by the method proposed in P.R control mode. the parallel scheme can effectively take advantage of the quasi-PR inverters, such as low output impedance, hard resonant inverter output voltage characteristics, effectively inhibited the circulation between the inverter parallel modules and so on. The method would come into wide use.

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