Research on the control strategy of LCL-type PV grid-connected inverter

Abstract

This paper examines a three-phase grid-connected photovoltaic inverter using LCL technology. Circuit for a full-bridge inverter with three phases and a filter of type LCL are used, and the control strategy consisting of two closed-loop loops is used to remove the effects caused by harmonics on the system. Finally, the simulation and analysis are carried out by MATLAB software to express the possibility of inverter system operation in a more intuitive way, such as a waveform diagram, to verify the rationality of the paper.