中文说明：
利用matlab软件对微电网光伏并网过程进行仿真，针对微电网的并网模式进行研究，实现微电网并网和孤岛两种状态的过渡
English Description：
Matlab software is used to simulate the process of microgrid photovoltaic grid connection, and the grid connection mode of microgrid is studied to realize the transition of microgrid grid connection and island