Simulation analysis of singlephase grid inverter based on onecycle control

GAO Xuejun, CAO Chong, ZHOU Xin
(Institute of Electrical Engineering and Renewable Energy, Three Gorges University, Yichang 443002, China)

Abstract: For the study of solar photovoltaic power generation on singlephase grid problem, one cycle control was applied to the grid inverter. One cycle control theory was used to control each switch precisely in every switching. Based on this method, the sinusoidal pulse width modulation was realized, the control circuit is simple and it has fast dynamic control response. Matlab/Simulink software was used to establish simulative model of grid inverter. The experimental results show that the output waves THD of grid inverter is very small, and this inverter could rapidly respond “single island” affect. The results show that using this method to realize singlephase grid technology is simple, and it provides a method for photovoltaic to power generation grid of residential customers.
Key words: one cycle control; singlephase grid; inverter; Matlab/Simulink simulation