Abstract：This paper introduce technical rule for connecting wind farm to power system of our country. Then, this paper proposes a coordination strategy for Crowbar and DC-chopper based the doubly fed induction generator (DFIG) enhance the low-voltage ride-through(LVRT) capability, and investigates the application of a static synchronous compensator(STATCOM) to provide reactive power for the wind farm during grid faults. The research result shows that, the suppression effect of rotor current will be better with more bypass resistance of the Crowbar. However, if the bypass resistor is selected too large, it will cause the DC bus overvoltage and the chances of Crowbar act. The proposed LVRT protection schemes not only suppress the rotor current and DC bus voltage, but also contribute to the recovery of the fault point voltage.
黄晶,朱武. 基于DFIG风电场联合保护的低电压穿越研究[J]. 电气技术, 2015, 16(9): 34-37.
Huang Jing,Zhu Wu. Study on Low Voltage Ride Through for DFIG-based Wind Farm based on Combined Protection. Electrical Engineering, 2015, 16(9): 34-37.
[1] 郭金东, 赵栋利, 林资旭, 等. 兆瓦级变速恒频风力发电机组控制系统[J]. 中国电机工程学报, 2007, 27(6): 1-6. [2] Mohseni M, Islam S M. Review of international grid codes for wind power integration: Diversity, technology and a case for global standard[J]. Renewable & Sustainable Energy Reviews, 2012, 16(6): 3876-3890. [3] B/T Q9963—2011. 风电场接入电力系统技术规定[S]. [4] 李宾宾, 丁明, 韩平平. 双馈感应风力发电机故障穿越特性及其控制[J]. 中国电力, 2011, 44(9): 10-16. [5] Yang Lihui, Xu Zhao, Ostergaard J, et al. Advanced control strategy of DFIG wind turbines for power system fault ride through[J]. IEEE Transactions on Power Systems, 2012, 27(2): 713-722. [6] Petersson A, Harnefors L, Thiringer T. Evaluation of current control methods for wind turbines using doubly-fed induction machines[J]. IEEE Transactions on Power Electronics, 2005, 20(1): 227-235. [7] 向大为, 杨顺昌, 冉立. 电网对称故障时双馈感应发电机不脱网运行的励磁控制策略[J]. 中国电机工程学报, 2006, 26(3): 164-170. [8] Lima F K, Luna A, Rodriguez P A, et al. Rotor voltage dynamics in the doubly fed induction generator during grid faults[J]. IEEE Transactions on Power Electronics, 2010, 25(1): 118-130. [9] 张学广, 徐殿国. 电网对称故障下基于active crowbar双馈发电机控制[J]. 电机与控制学报, 2009, 13(1): 99-103. [10] 马文龙. Crowbar保护在双馈异步风力发电系统电网故障穿越中的应用[J]. 电力自动化设备, 2011, 31(7): 127-130. [11] 贺益康, 胡家兵, 徐烈. 并网双馈异步风力发电机运行控制[M]. 北京: 中国电力出版社, 2012.
2015, Vol. 16 
