Circulating current in parallel connected inverter system

This paper discusses definition and characteristics of circulating current in a parallel connected inverter system. The circulating current in two parallel connected inverters is first defined. Then the circulating current is generalized for N-parallel inverter system. Several MATLAB/Simulink simulations have been conducted to investigate the circulating current in a three parallel connected inverter system. Based on the results, the discussion on the circulating current and power flow are presented.