Study of Fault Current Characteristics of the DFIG Considering Dynamic Response of the RSC

被引：80

作者：

Kong, Xiangping ^{[1
]}

Zhang, Zhe ^{[1
]}

Yin, Xianggen ^{[1
]}

Wen, Minghao ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Peoples R China

来源：

IEEE TRANSACTIONS ON ENERGY CONVERSION | 2014年 / 29卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Doubly fed induction generator (DFIG); dynamic response; fault current characteristics; nonsevere fault; FED INDUCTION GENERATOR; WIND TURBINE;

D O I：

10.1109/TEC.2014.2309694

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：

During nonsevere fault conditions, the crowbar protection is not activated and the rotor windings of a doubly fed induction generator (DFIG) are still excited by the ac/dc/ac converter. In these cases, the dynamic response of a rotor-side converter (RSC) has a large influence on the fault current characteristics of the DFIG. In this paper, an analysis method for the fault current characteristics of the DFIG under nonsevere fault conditions is proposed. First, the dynamic response of the RSC is analyzed on condition that the external power control loop is shut down and the reference signals of the inner rotor current control loop are kept constant. Then, the simplified calculation models of the rotor fault current are established according to different design principles of the inner rotor current controller. Based on it, the fault characteristics of the stator current are studied and the analytical expressions of the stator fault current are obtained. Finally, digital simulation results validate the analytical results. The proposed analysis method is applicable for the study of fault current characteristics of DFIG with different control strategies for low-voltage ride through. The research results are helpful to the construction of adequate relaying protection for the power grid with penetration of DFIGs.

引用

页码：278 / 287

页数：10

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