中文说明：
基于SOGI（2阶广义积分器）的单相锁相环simulink仿真，参考《光伏与风力发电系统并网变换器》周克亮译 71页。
English Description：
The simulation of single-phase phase-locked loop based on sogi (second-order generalized integrator) in Simulink, refer to "photovoltaic and wind power system grid connected converter" translated by Zhou Keliang on page 71