Improved Control Strategy for DFIG Wind Turbines for Low Voltage Ride Through

被引：18
|
作者：
Wu, Zaijun [1 ]
Zhu, Chanxia [1 ]
Hu, Minqiang [1 ]
机构：
[1] Southeast Univ, Sch Elect Engn, Nanjing 210096, Jiangsu, Peoples R China
来源：
ENERGIES | 2013年 / 6卷 / 03期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
doubly fed induction generator (DFIG); low voltage ride through (LVRT); grid defaults; FED INDUCTION GENERATOR; THROUGH ENHANCEMENT; FARMS; POWER; OPERATION; SYSTEM;
D O I：
10.3390/en6031181
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：
This paper presents an improved control strategy for both the rotor side converter (RSC) and grid side converter (GSC) of a doubly fed induction generator (DFIG)-based wind turbine (WT) system to enhance the low voltage ride through (LVRT) capability. Within the proposed control strategy, the RSC control introduces transient feed-forward compensation terms to mitigate the high frequency harmonic components and reduce the surge in the rotor currents. The proposed GSC control scheme also introduces a compensation term reflecting the instantaneous variation of the output power of the rotor side converter with consideration of the instantaneous power of grid filter impendence to keep the dc-link voltage nearly constant during the grid faults. To provide precise control, non-ideal proportional resonant (PR) controllers for both the RSC and GSC current regulation are employed to further improve dynamic performance. Simulations performed in Matlab/ Simulink verify the effectiveness of the proposed control strategy.
引用
收藏
页码：1181 / 1197
页数：17
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