Three-phase transformerless photovoltaic inverter without common mode leakage current

被引：2
|
作者：
Yao, Zhilei [1 ]
He, Xiangyu [1 ]
Gan, Jiwei [2 ]
Mao, Saijun [3 ]
机构：
[1] Shanghai Maritime Univ, Dept Elect Engn, Shanghai 201306, Peoples R China
[2] Yancheng Inst Technol, Sch Automot Engn, Yancheng, Peoples R China
[3] Fudan Univ, Acad Engn & Technol, Shanghai, Peoples R China
来源：
ENGINEERING REPORTS | 2022年 / 4卷 / 09期
基金：
中国国家自然科学基金;
关键词：
common ground; common mode leakage current; three-phase inverter; transformerless inverter; CURRENT ATTENUATION; CURRENT REDUCTION; TOPOLOGY; STRATEGY;
D O I：
10.1002/eng2.12496
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Since three-phase transformerless (TPT) PV inverters have large common mode leakage current (CMLC), a TPT PV inverter without CMLC is proposed. The proposed inverter is derived from three single-phase half-bridge inverters and a boost converter. Grounds of the PV array and three-phase loads are connected directly, so no CMLC exists in the TPT solar inverter. Operating principle, stability analysis, and loss calculation and example of the proposed three-phase inverter are illustrated in detail. The pulse-width modulation (PWM) and sinusoidal PWM control methods are used in the boost converter and three-phase inverter, respectively. The proposed inverter is a stable system. Finally, simulation and experimental results of a 900-W TPT PV inverter confirm the theoretical analysis. The CMLC in the proposed inverter is only about 0.8 mA, which is mainly caused by the ground line inductance and oscilloscope probe noise.
引用
收藏
页数：15
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