Single-Carrier Modulation for Neutral-Point-Clamped Inverters in Three-Phase Transformerless Photovoltaic Systems

被引：60

作者：

Guo, Xiaoqiang ^{[1
]}

Cavalcanti, Marcelo C. ^{[2
]}

Farias, Alexandre M. ^{[2
]}

Guerrero, Josep M. ^{[3
]}

机构：

[1] Yanshan Univ, Key Lab Power Elect Energy Conservat & Motor Driv, Dept Elect Engn, Qinhuangdao 066004, Peoples R China

[2] Univ Fed Pernambuco, Dept Elect Engn & Power Syst, BR-50730540 Recife, PE, Brazil

[3] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2013年 / 28卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Common-mode voltage; modulation; neutral-point-clamped inverter; transformerless photovoltaic (PV) system;

D O I：

10.1109/TPEL.2012.2224138

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：

Modulation strategy is one of the most important issues for three-level neutral-point-clamped inverters in three-phase transformerless photovoltaic systems. A challenge for modulation is how to keep the common-mode voltages constant to reduce the leakage currents. A single-carrier modulation strategy is proposed. It has a very simple structure, and the common-mode voltages can be kept constant with no need of complex space-vector modulation or multicarrier pulsewidth modulation. Experimental results verify the theoretical analysis and the effectiveness of the presented method.

引用

页码：2635 / 2637

页数：3

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