光伏逆变器的并网控制技术研究

Study on grid-connected control technology of PV inverter

以三相100 kW光伏并网逆变器为研究平台,阐述了并网逆变器的工作原理和系统结构,分析了并网逆变器的并网控制技术,提出一种基于坐标变换和正负序分离的矢量控制的软件锁相环技术,并给出了设计结果,实现了100 kW光伏逆变器的并网设计。

With the 3-phase 100 kW photovoltaic（PV） grid-connected inverter as the platform,the operating principle and system structure was explained,the grid-connected control technology of the inverter was analyzed,and a soft phase-locked loop（PLL） of vector control based on coordinate conversion and positive-negative sequence separation was proposed.The results of design were given,and the 100 kW PV grid-connected inverter was realized.