Control Strategy of Cascade STATCOM Under Unbalanced Grid Conditions

被引：6
|
作者：
Xia Zhenglong [1 ]
Shi Liping [1 ]
Yang Xiaodong [1 ]
机构：
[1] China Univ Min & Technol, Sch Informat & Elect Engn, Xuzhou 221116, Peoples R China
来源：
IETE TECHNICAL REVIEW | 2014年 / 31卷 / 02期
基金：
高等学校博士学科点专项科研基金;
关键词：
Supply voltage imbalance; Cascade STATCOM; Control strategy;
D O I：
10.1080/02564602.2014.892741
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 network imbalance has become an increasingly serious problem, particularly in coal mines. This study presents an improved control strategy of cascade STATCOM under unbalanced grid conditions. This study investigates the balance and control of all DC capacitor voltages, from global balancing control, clustered balancing control and individual balancing control. In addition, a dual current control closed loop is presented to achieve complete compensation of reactive and negative sequence currents. Simulation results and industrial prototype tests show that the improved control strategy of cascade STATCOM not only solves the balance control problem of all DC capacitor voltages under an unbalanced grid condition, but also improves the ability to reject unbalanced disturbance.
引用
收藏
页码：177 / 185
页数：9
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