Control of DFIG-based Wind Farms for Network Unbalance Compensation

被引：0
|
作者：
Wang, Yi [1 ]
Xu, Lie [1 ]
Williams, Barry W. [1 ]
机构：
[1] Univ Strathclyde, Dept Elect & Elect Engn, Glasgow G1 1XW, Lanark, Scotland
来源：
2008 IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-10 | 2008年
关键词：
D O I：
暂无
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：
This paper investigates the control of doubly-fed induction generator (DFIG) based wind farms for compensating voltage unbalance in weak networks. A DFIG system model containing the generator and its back-to-back converters suitable for analyzing system operation under unbalanced conditions is developed. A control strategy for compensating grid voltage unbalance using DFIG systems is proposed. The negative sequence current injected into the transmission line for the rebalancing control can be provided by either the grid-side or the rotor-side converter. Various methods for coordinating these two converters and their impact on system operation are analyzed. The capabilities of the converters with a DFIG system for negative sequence current compensation are also discussed. The validity of the proposed control strategy is demonstrated by Matlab/Simulink simulations. With the proposed strategy, DFIG based wind farms can provide voltage unbalance compensation for the connected weak grid to improve the performance and stability of the whole wind energy system.
引用
收藏
页码：113 / 119
页数：7
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