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

被引：59
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
收藏
页码：2635 / 2637
页数：3
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