Improved Reactive Current Detection Method of SVG

被引：1

作者：

Wei, Xueliang ^{[1
]}

Zhu, Guorong ^{[2
]}

Lu, Jianghua ^{[2
]}

Li, Wenjing ^{[2
]}

Qi, Erjie ^{[2
]}

机构：

[1] China Univ Petr, Coll Geophys & Informat Engn, Beijing 100000, Peoples R China

[2] Wuhan Univ Technol, Sch Automat, Wuhan 430000, Hubei, Peoples R China

来源：

ENERGIES | 2017年 / 10卷 / 09期

基金：

中国国家自然科学基金;

关键词：

static VAR generator; instantaneous reactive current detection; phase locked loop; moving average filter;

D O I：

10.3390/en10091374

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：

The static VAR generator (SVG) is an important device in flexible AC transmission systems (FACTS) for the development of smart grids. Based on the basis principle of SVG and instantaneous reactive power theory, the conventional i(p)-i(q) and dq methods have a certain error when the three phase voltages are unbalanced. In this paper, the current detection algorithm is improved in cases of three-phase power asymmetry by using the fundamental positive-sequence reactive current instead of the voltage as the input of phase locked loop (PLL). So the problems caused by unbalanced three-phase voltages could be avoided. In addition, a moving average filter is designed to improve the performance of the detection accuracy and dynamic response. Experiments verify the correctness and effectiveness of the proposed scheme.

引用

页数：11

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