中文说明：
本次设计介绍了并网逆变器的数学模型、PQ 恒功率控制原理,搭建了 PQ 控 制模型,验证了 PQ 控制的运行特性,实现了有功无功功率的任意调节。
English Description：
This design introduces the mathematical model of grid connected inverter, PQ constant power control principle, builds the PQ control model, verifies the operation characteristics of PQ control, and realizes the arbitrary regulation of active and reactive power