Research on photovoltaic grid-connected inverter control by predictive current

Abstract

A kind of control method which is suitable for photovoltaic grid-connected is introduced in this paper. It can solve the problems of the parameters set difficult and the system static error of the PI control method. For the shortcomings of static error of traditional PI control, the system adopts deadbeat control adjustment based on predictive current method and analyses the control delay of inductance parameters. The control method can effectively reduce total harmonic distortion. Feasibility and correctness of the improvement program are verified by simulation and experimental results.

Keywords

• photovoltaic gird-connected
• inverter
• deadbeat
• predictive current