Ground Leakage Current Suppression in a 50 kW 5-level T-type Transformerless PV Inverter

被引：0
|
作者：
Wang, Lu [1 ]
Shi, Yanjun [1 ]
Shi, Yuxiang [1 ]
Xie, Ren [1 ]
Li, Hui [1 ]
机构：
[1] Florida State Univ, Ctr Adv Power Syst, Tallahassee, FL 32310 USA
来源：
2016 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE) | 2016年
关键词：
PV inverter; leakage current; T-type; 5-level;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In this paper ground leakage current suppression in a 50 kW 5-level T-type transformerless PV inverter has been presented. Compared to a 3-level T-type PV inverter, this topology allows a simple modulation method such as carrier-based (CB) PWM can be used to suppress the leakage current without the penalty of the traditional methods. Phase disposition (PD) and phase opposition disposition (POD) based CB PWM method has been applied to this 5-level topology. The spectrum analysis has demonstrated that PD and POD will generate the same phase voltage spectrum. In addition, the common-mode (CM) voltage of a 5-level T-type PV inverter has been derived and the CM choke has been designed. The value of the CM choke is a 73% reduction compared to that of a 3-level T-type PV inverter. The simulation and experimental verification have been provided.
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页数：6
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