Modulation for Three-Phase Transformerless Z-Source Inverter to Reduce Leakage Currents in Photovoltaic Systems

被引：137

作者：

Bradaschia, Fabricio ^{[1
]}

Cavalcanti, Marcelo C. ^{[1
]}

Ferraz, Pedro E. P. ^{[1
]}

Neves, Francisco A. S. ^{[1
]}

dos Santos, Euzeli C., Jr. ^{[2
]}

da Silva, Joao H. G. M. ^{[2
]}

机构：

[1] Univ Fed Pernambuco, Dept Elect Engn, BR-50670901 Recife, PE, Brazil

[2] Univ Fed Campina Grande, Dept Elect Engn, BR-58109900 Campina Grande, PB, Brazil

来源：

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS | 2011年 / 58卷 / 12期

关键词：

Energy conversion; photovoltaic (PV) power systems; pulsewidth-modulated power converters; MPPT PERFORMANCE; BOOST CONTROL;

D O I：

10.1109/TIE.2011.2116762

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

080201 [机械制造及其自动化];

摘要：

In this paper, a modified Z-source inverter (ZSI) with specific modulation techniques is proposed to reduce leakage currents in three-phase transformerless photovoltaic (PV) systems. The new topology only requires an additional fast-recovery diode when compared with the original structure. On the other hand, the pulsewidth modulation technique is entirely modified in order to reduce the leakage currents through the conduction path. Simulation results for the three-phase transformerless PV system operating in two cases, i.e., connected to a grid and connected to a grounded RL load, are presented. Experimental results of leakage currents in three-phase ZSIs connected to a RL load are obtained to validate the theoretical and simulation models.

引用

页码：5385 / 5395

页数：11

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