Abstract

Firstly, the paper describes the basic principles of the traditional grid-connected inverter. Then the paper proposes the multi-functional grid-connected inverter, and by comparing these four aspects: DC voltage conversion, inverter circuit, filter networks and power devices show the difference between multi-functional grid-connected inverter and traditional grid-connected inverter. Finally, considering the need of micro-grid, the paper makes a review on multi-functional inverter’s applications in micro-grid from the function viewpoint. At the end of this paper, some possible future research directions about multi-functional grid-connected inverter are analyzed and discussed.

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