光伏并网发电系统中逆变器的设计与控制方法

Design and Control Strategies of Inverters for a Grid-connected Photovoltaic Power System

针对光伏并网发电系统中关键部件——逆变器的结构设计与控制方法研究进行了详细分析和阐述。从电网、光伏阵列以及用户对逆变器的要求出发,分析了各种不同的逆变器拓扑结构与控制方法,比较其运行效率和控制效果。对于目前国内外光伏发电系统中并网逆变器的研究现状、亟待解决的问题进行了阐述,指出光伏发电系统中并网逆变器高效可靠运行的发展方向。

With energy, zoology and environments being paid increasing attention, a photovoltaic （PV） system supplying power directly to a power grid becomes more popular available. This paper focuses on the structure design and control strategies of inverters for the grid-connected PV system. It starts with an examination of the demands requested by the power grid, the PV array and the users for the inverters. Then follows a review to see how these demands are achieved with all sorts of topologies and control strategies of inverters and accordingly the working efficiency and control effect are compared. Also, the background, the fundamentals, the approaches and the main results of evolutionary grid-connected PV inverters are outlined. In the end, several open questions and the state-of-arts of the grid-connected PV inverters are discussed.