The simulation of controlling strategy for output current tracking of grid-connected inverter

The control strategy of grid-connected inverter has always been a core question of generating systems. This paper analyzed three kinds of ways pf inverter's output current based on the current control mode. Those are current hysteretic comparison control method, timing control of current instantaneous comparison method and the triangle wave comparison control method of timing tracking current. And all of three were simulated by MATLAB/Simulink. It turned out to be that the three methods for grid-connected inverter have good grid effect. Each of them has their advantages and disadvantages in grid control strategy. All of them will provide theoretical basis for further research.