华东交通大学学报Issue(4)：114-118,5.
一种新型单相三开关光伏并网逆变器研究
Study on Novel Single-phase Photovoltaic Grid-connected Inverter with Three Switching Devices
摘要
Abstract
There are strict requirements of input voltage for a photovoltaic inverter due to some external effects and internal factors, and it is difficult to solve the problem of tolerance to varied input DC voltage properly through the traditional method of an inverter plus a transformer and multi-stage cascading. In order to meet the need of tole-rance to a widely varied input DC voltage and realize the function of inversion and step-up in photovoltaic grid-connected inverter, this paper puts forward a novel single-phase photovoltaic grid-connected inverter topology with three switches. High-frequency switches and fly-back converter were adopted to substitute the traditional bulky line frequency step-up transformer, which made the system easy to integrate with small volume, low weight and cost, and higher efficiency. The closed-loop sinusoidal PWM control method with real-time waveform feed-back technique can provide fast dynamic response. Through a small ac filter, the inverter achieved low-THD sinu-soidal output. Simulation results verify that the novel single-phase photovoltaic grid-connected inverter is fea-tured by simple structure and control, tolerance to a widely varied input DC voltage with high reliability.关键词
光伏/并网逆变器/直流电压输入变化的适应性Key words
photovoltaic/grid-connected inverter/tolerance to varied input DC voltage分类
信息技术与安全科学引用本文复制引用
章勇高,李洋,康淦明,常凯旋..一种新型单相三开关光伏并网逆变器研究[J].华东交通大学学报,2014,(4):114-118,5.基金项目
江西省工业科技支撑农业项目（2012BBF60084）；江西省教育厅科技项目 （）
