The three-level inverter is the core part of the system, its main function is that adverse-transforming DG into AC and send into the electric net.

• 三相光伏并网逆变器是并网发电系统的核心部分，其主要功能是将太阳能电池板发出的直流电逆变成三相交流电，并送入电网，实现并网的目的。