中文摘要：

在太阳能开发和利用过程中,光伏发电并网系统以其运行成本低和供电稳定性,越来越受到人们的重视。论文以太阳能光伏发电三相并网逆变器为对象,研究太阳能光伏发电与电网连接的相关技术问题。分布式电源接口逆变器主要有恒压恒频控制、下垂控制、恒功率控制三种控制方法。论文在探讨其控制原理的基础上,分别设计了分布式电源接口逆变器的恒压恒频(V/f)控制器、恒功率(PQ)控制器,并分析了它们的运行特性。

英文摘要：

With the development and utilization of solar power,photovoltaic power generation grid-connected system becomes popular with its low running costs and power supply stability. In view of three-phase grid inverter of solar Photovoltaic power generation,the technical issues of connecting the solar photovoltaic power generation with the grid is being studied in the paper. Distributed source interface inverter has three controlling methods,they are constant voltage, constant frequency control(V/f control),droop control,constant power control(PQ control). Based on discussing the controlling theory ,these three kinds of distributed sources interface inverter controller are designed,also their operating characteristics have been examined.