中文说明：
运用PQ控制环节，实现有功功率和无功功率的解耦，通过电流环的跟踪控制环节实现电流的跟踪，通过功率控制环节实现功率因数为1，综上的控制实现光伏三相并网，实现最大效率的能源应用
English Description：
The PQ control link is used to realize the decoupling of active power and reactive power, the current tracking control link is used to realize the current tracking, and the power factor is 1 through the power control link. To sum up, the control realizes the photovoltaic three-phase grid connection and the most efficient energy application