Abstract：In order to study the fault current characteristics of doubly-fed induction generator (DFIG) under symmetrical and asymmetrical fault conditions, dynamic model of DFIG in stator stationary reference frame is developed. On condition that a severe fault occurs and crowbar protection is activated, the dynamic characteristics of stator flux linkage of DFIG are studied. Moreover, a simplified calculation model of stator flux linkage is established with consideration of accuracy as well as simplicity. Based on it, the fault current characteristics DFIG under conditions of symmetrical faults and asymmetrical faults are analyzed and the analytical expressions are obtained. Besides, the equivalent calculation models of fault current are built. Finally, the digital simulation results show that the theoretical analysis results have high accuracy in the first two cycles after the fault occurs which can meet the requirements of the study of relaying protection principle and setting calculation.
孔祥平, 张哲, 尹项根, 王菲, 隆茂. 计及撬棒保护影响的双馈风力发电机组故障电流特性研究[J]. 电工技术学报, 2015, 30(8): 1-10.
Kong Xiangping, Zhang Zhe, Yin Xianggen, Wang Fei, Long Mao. Study of Fault Current Characteristics of DFIG Considering Impact of Crowbar Protection. Transactions of China Electrotechnical Society, 2015, 30(8): 1-10.
[1] 刘其辉, 谢孟丽. 双馈式变速恒频风力发电机的空载及负载并网策略[J]. 电工技术学报, 2012, 27(10): 60-67, 78.Liu Qihui, Xie Mengli. Strategies of grid-connection of doubly-fed variable-speed constant-frequency wind power generator with no-load and with load[J]. Transac- tions of China Electrotechnical Society, 2012, 27(10): 60-67, 78. [2] Muller S, Deicke M, De Doncker R W. Doubly fed induction generator systems for wind turbines[J]. IEEE Industry Applications Magazine, 2002, 8(3): 26-33. [3] Hughes F M, Lara O A, Jenkins N, et al. Control of DFIG-based wind generation for power network support [J]. IEEE Transaction on Power Systems, 2005, 20(4): 1958-1966. [4] 贺益康, 周鹏. 变速恒频双馈异步风力发电系统低电压穿越技术综述[J]. 电工技术学报, 2009, 24(9): 140-146.He Yikang, Zhou Peng. Overview of the low voltage ride-through technology for variable speed constant frequency doubly fed wind power generation systems [J]. Transactions of China Electrotechnical Society, 2009, 24(9): 140-146. [5] 叶希, 鲁宗相, 乔颖, 等. 大规模风电机组连锁脱网事故机理初探[J]. 电力系统自动化, 2012, 36(8): 11-17.Ye Xi, Lu Zongxiang, Qiao Yin, et al. A primary analysis on mechanism of large scale cascading trip- off of wind turbine generators[J]. Automation of Electric Power Systems, 2012, 36(8): 11-17. [6] 雷亚洲, Gordon Lightbody. 国外风力发电导则及动态模型简介[J]. 电网技术, 2005, 25(12): 27-32.Lei Yazhou, Gordon Lightbody. An introduction on wind power grid code and dynamic simulation[J]. Power System Technology, 2005, 25(12): 27-32. [7] Tsili M, Papathanassiou S. A review of grid code tech- nical requirements for wind farms[J]. IET Renewable Power Generation, 2009, 3(3): 308-332. [8] 撖奥洋, 张哲, 尹项根, 等. 双馈风力发电系统故障特性及保护方案构建[J]. 电工技术学报, 2012, 27(4): 233-239.Han Aoyang, Zhang Zhe, Yin Xianggen, et al. Research on fault characteristic and grid connecting-point protec- tion scheme for wind power generation with doubly- fed induction generator[J]. Transactions of China Electrotechnical Society, 2012, 27(4): 233-239. [9] Morren J, de Haan S W H. Ridethrough of wind turbines with doubly-fed induction generator during a voltage dip[J]. IEEE Transaction on Energy Conversion, 2005, 20(1): 435-441. [10] 关宏亮, 赵海翔, 王伟胜, 等. 风电机组低电压穿越功能及其应用[J]. 电工技术学报, 2007, 22(10): 173-177.Guan Hongliang, Zhao Haixiang, Wang Weisheng, et al. LVRT capability of wind turbine generator and its application[J]. Transactions of China Electrotechnical Society, 2007, 22(10): 173-177. [11] 周宏林, 杨耕. 不同电压跌落深度下基于撬棒保护的双馈式风机短路电流特性分析[J]. 中国电机工程学报, 2009, 29(S1): 184-191.Zhou Honglin, Yang Gen. Short circuit current characteristics of doubly fed induction generator with crowbar protection under different voltage dips[J]. Proceedings of the CSEE, 2009, 29(S1): 184-191. [12] Vicatos M S, Tegopoulos J A. Transient state analysis of a doubly-fed induction generator under three phase short circuit[J]. IEEE Transactions on Energy Conver- sion, 1991, 6(1): 62-68. [13] Morren J, de Haan S W H. Short-circuit current of wind turbines with doubly-fed induction generator[J]. IEEE Transactions on Energy Conversion, 2007, 22(1): 174-180. [14] 吕志强, 许国东. 兆瓦级双馈风电机组电网故障时的暂态分析[J]. 电力系统保护与控制, 2010, 38(23): 112-116, 125.Lü Zhiqiang, Xu Guodong. Transient analysis of grid short circuit fault of megawatt doubly fed wind turbine [J]. Power System Protection and Control, 2010, 38(23): 112-116, 125. [15] 张建华, 陈星莺, 刘皓明, 等. 双馈风力发电机三相短路分析及短路器最大电阻整定[J]. 电力自动化设备, 2009, 29(4): 6-10.Zhang Jianhua, Chen Xingying, Liu Haoming, et al. There-phase short-circuit analysis for double-fed wind- driven generator and short-circuit maximal resistance calculation[J]. Electric Power Automation Equipment, 2009, 29(4): 6-10. [16] 翟佳俊, 张步涵, 谢光龙, 等. 基于撬棒保护的双馈风电机组三相对称短路电流特性[J]. 电力系统自动化, 2013, 37(3): 18-23. Zhai Jiajun, Zhang Buhan, Xie Guanglong, et al. Three- phase symmetrical short-circuit current characteristics analysis of wind turbine driven DFIG with crowbar protection[J]. Automation of Electric Power Systems, 2013, 37(3): 18-23. [17] 胡家兵, 贺益康, 郭晓明, 等. 不平衡电压下双馈异步风力发电系统的建模与控制[J]. 电力系统自动化, 2007, 31(14): 47-56.Hu Jiabing, He Yikang, Guo Xiaoming, et al. Modeling and control of the DFIG based wind-power generation system under unbalanced grid voltage conditions[J]. Automation of Electric Power Systems, 2007, 31(14): 47-56.
2015, Vol. 30 
