适合初学者，该VSR仿真电压外环和电流内环都采用PI算法。仿真包括park，clark等变换。(For beginners, the VSR simulation voltage outer ring and current inner loop are used PI algorithm. Simulation includes park, clark and other transformation)

首先是将基于3 轴、2 维的定子静止坐标系的各物理量变换到2 轴的定子静止坐标系中。(Coordinate axis coordinate transformation)