完成了对光伏发电并网控制的设计及仿真。系统采用了两级式拓扑结构：前级用直流变换器进行最大功率跟踪及直流母线电压调整；后级用逆变器将直流电能逆变送入电网。(Completed the design and simulation of photovoltaic grid-connected control. The system adopts a two-stage topology: the front stage uses a DC converter for maximum power tra