Analysis of output impedance of parallel inverters

The circumfluence control is the key to achieve the inverter parallel operation.Increasing the output impedance of inverter can effectively control the circumfluence,but it will seriously influence dynamic characteristic of inverter.The average-load-current front-feed based on dual-loop controlled inverters was brought out in this paper.The detailed theoretical analysis proved that the curcumfluence impedance could be enlarged,and the circumfluence control and dynamic characteristic could be enforced.The simulation results show that this project can effectively control the circumfluence and enforce the stability of parallel inverter system.