Flexible power control for rotor-side converter of doubly-fed induction generator under unbalanced voltage condition

被引：0
|
作者：
Ma, Jing [1 ]
Liu, Qing [1 ]
Wu, Jiafang [2 ]
Sun, Fangqing [2 ]
Wang, Ying [3 ]
Shen, Yuming [1 ]
Zhou, Niancheng [2 ]
机构：
[1] State Grid Anhui Electric Power Company Economic and Technological Research Institute, Hefei,230022, China
[2] State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing,400044, China
[3] State Grid Economic and Technological Research Institute Co., Ltd., Beijing,102209, China
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 02期
关键词：
Power control;
D O I：
10.16081/j.issn.1006-6047.2019.02.029
中图分类号：
学科分类号：
摘要：
The relationship between the instantaneous active and reactive power of stator and three-phase stator vol-tage and rotor current is analyzed for the rotor-side converter of DFIG(Doubly-Fed Induction Generator) in case of unbalanced voltage. A generalized formula of rotor current reference is achieved by introducing continuous adjustment coefficients. Furthermore, the expressions of command current regulation coefficient, rotor current peak, active and reactive fluctuation of DFIG stator are obtained, respectively. Then, the changing law of control charac-teristics for DFIG with respect to the regulation coefficient and voltage imbalance is analyzed. Moreover, the controllability of DFIG under unbalanced voltage drop is analyzed, and the critical value of stator voltage after voltage drop and the control condition of rotor-side converter are presented respectively. Finally, the flexible power control strategy for DFIG in unity power factor mode and reactive power supporting mode is presented considering the power fluctuation set value and rotor phase current limit, and simulation results verify the effectiveness of the proposed method. © 2019, Electric Power Automation Equipment Press. All right reserved.
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页码：196 / 203
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