Flexible Control Strategy for Grid-Connected Inverter Under Unbalanced Grid Faults Without PLL

被引：125

作者：

Guo, Xiaoqiang ^{[1
]}

Liu, Wenzhao ^{[1
]}

Zhang, Xue ^{[1
]}

Sun, Xiaofeng ^{[1
]}

Lu, Zhigang ^{[1
]}

Guerrero, Josep M. ^{[2
]}

机构：

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

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

来源：

IEEE TRANSACTIONS ON POWER ELECTRONICS | 2015年 / 30卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Current quality; grid-connected inverter; grid fault; phase-locked loop (PLL); power oscillation; weak grid; POWER-GENERATION SYSTEMS; CONTROL SCHEME; VOLTAGE CONDITIONS; LCL-FILTER; CONVERTERS; SYNCHRONIZATION; IMPLEMENTATION; DESIGN; SAGS;

D O I：

10.1109/TPEL.2014.2344098

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：

Power oscillation and current quality are the important performance targets for the grid-connected inverter under unbalanced grid faults. First, the inherent reason for the current harmonic and power oscillation of the inverter is discussed with a quantitative analysis. Second, a new control strategy is proposed to achieve the coordinate control of power and current quality without the need for a phase-locked loop (PLL) or voltage/current positive/negative sequence extraction calculation. Finally, the experimental tests are conducted under unbalanced grid faults, and the results verify the effectiveness of the propose method.

引用

页码：1773 / 1778

页数：6

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