A novel control strategy for enhancing the LVRT and voltage support capabilities of DFIG

被引:0
|
作者
Shen, Yangwu [1 ]
Zhang, Bin [1 ]
Liang, Liqing [1 ]
Cui, Ting [1 ]
机构
[1] State Grid Hunan Elect Power Corp, Res Inst, Changsha 410007, Hunan, Peoples R China
关键词
SYSTEM;
D O I
10.1088/1755-1315/121/4/042035
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
A novel integrated control strategy is proposed in this paper to enhance the low voltage ride through capacity for the double-fed induction generator by equipping an energy storage system. The energy storage system is installed into the DC-link capacitor of the DFIG and used to control the DC-link voltage during normal or transient operations. The energy storage device will absorb or compensate the power difference between the captured wind power and the power injected to the grid during the normal and transient period, and the grid side converter can be free from maintaining the voltage stability of the DC-link capacitor. Thus, the grid-side converter is changed to reactive power support while the rotor-side converter is used to control the maximum power production during normal operation. The grid-side converter and rotor-side converter will act as reactive power sources to further enhance the voltage support capability of double-fed induction generator during the transient period. Numerical Simulation are performed to validate the effectiveness of the proposed control designs.
引用
收藏
页数:11
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