High-Efficiency Grid-Connected Inverter Topology for Low-Power Photovoltaic Applications

被引:0
作者
Guo, Xiao-Rui [1 ]
Li, Zu-Xin [1 ]
机构
[1] Huzhou Univ, Sch Engn, Huzhou 313000, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
photovoltaic system; three-level inverter; high efficiency; full-bridge topology; TRANSFORMERLESS INVERTER; MULTILEVEL INVERTER; MOSFET INVERTER; SYSTEMS; RELIABILITY; MODULE;
D O I
10.1002/tee.22386
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
3 For low-power applications, such as household photovoltaic panels, the efficiency and reliability of the distributed generation system is an important issue. A high-efficiency inverter topology derived from the normal full-bridge circuit is proposed for grid-connected photovoltaic applications. In the proposed topology, a couple of diodes are added in parallel with the grid-frequency switches as freewheeling diodes working during the positive and negative half-cycles of the utility voltage, respectively, thus preventing the output current from flowing through the body diodes of switches. Because of its natural configuration, simple operation, and three-level function, the proposed topology features a high level of efficiency and reliability over a wide voltage range, and allows the best cost-effective ratio. These characteristics are compared with those of other existing advanced topologies, followed by a theoretical analysis on the output filter and the implemented circuit of modulation scheme. Experimental results from a 3 kW hardware prototype verify the feasibility of the proposed solution. (c) 2016 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.
引用
收藏
页码:365 / 371
页数:7
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