光伏逆变器的实验研究-《武汉职业技术学院学报》

文章信息/Info

Author(s):: XU Sheng-hui; Department of Electronic Information Engineering, Wuhan Polytechnic，Wuhan430074, China

Keywords:: grid connected PV inverter; boost converter; fly back converter; simulation experiment

摘要:: 介绍了一种由DC-DC变换器和全桥DC-AC 变换器组成的光伏逆变系统。这种DC-DC 变换器结合升压和反激式拓扑，产生一个半正弦输出电流，并且实现了升高压的目的。然后采用一个由低频开关技术控制的全桥DC-AC 变换器将电流转换成正弦形式，并向单位功率因数电网提供电力。首先阐述了所创建的光伏逆变器的电路工作原理，最后设计了一个80W 原型系统，并通过仿真实验验证了所提出的光伏逆变系统的可行性和有效性。

Abstract:: This paper presents a PV inverter system formed by a DC-DC converter and a full-bridge DC-AC con— verter. The DC-DC converter combines the boost and fly back topologies to produce a semi-sinusoidal output current and achieve the high step-up objective. A full-bridge DC-AC converter controlled with low-frequency switching tech— niques is used to convert the current into sinusoidal form and feed power to the grid with unit power factor. The circuit operating theory of the proposed PV inverter is firstly addressed；then an 80W prototype system is designed and built. The feasibility and effectiveness of the proposed circuit are confirmed with some simulation and experimental results.