Transformerless Grid-Connected PV Inverter Without Common Mode Leakage Current and Shoot-Through Problems

被引：37
|
作者：
Yao, Zhilei [1 ]
Zhang, Yubo [2 ]
Hu, Xuefeng [2 ]
机构：
[1] Shanghai Maritime Univ, Dept Elect Engn, Shanghai 201306, Peoples R China
[2] Anhui Univ Technol, Dept Elect Engn, Maanshan 243002, Peoples R China
来源：
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 2020年 / 67卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Inverters; Leakage currents; Hysteresis; Transfer functions; PI control; Equivalent circuits; Transformerless PV inverter; grid-connected inverter; doubly grounded; common mode leakage current; shoot-through problem; dual-buck inverter; BUCK;
D O I：
10.1109/TCSII.2020.2990447
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：
As there is shoot-through problem and common mode leakage current in conventional transformerless grid-connected PV inverters, a transformerless grid-connected PV inverter without common mode leakage current and shoot-through problems is proposed. The proposed inverter consists of a buck-boost converter and a dual-buck half-bridge inverter, so there is no shoot-through problem in the proposed inverter. As grounds of the input source and the grid are shorted, there is no common mode leakage current. No current flows through the body diodes of switches, so efficiency of the system is improved. Operating principle of the proposed inverter is elaborated in detail. Experimental results of a 350 W proposed inverter validate the theoretical analysis.
引用
收藏
页码：3257 / 3261
页数：5
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