Abstract：Given the characteristics of MW-level direct-drive permanent magnet synchronous generator(PMSG), a sensorless control based on SFDICT rotor flux linkage position integrator is presented. Its implementation principle is introduced. In addition, performance of SFDICT under different harmonic components and different limits is discussed in depth. Furthermore, error evaluation formula under different limits is proposed. Based on it, small limit method with angle compensation is proposed. Finally, experiment results indicate the proposed method can get better accuracy and current of good quality. Results also show its excellent steady and dynamic performance as well as easy implementation.
[1] Polinder H, de Haan S W R, Dubois M R, et al. Basic operation principles and electrical conversion system of wind turbines[J]. Energy and Power Engineering, 2005, 15(4): 43-50. [2] Li H, Chen Z. Overview of different wind generator systems and their comparisons[J]. IET Renewable Power Generation, 2008, 2(2): 123-138. [3] 薛玉石, 韩力, 李辉. 直驱永磁同步风力发电机组研究现状与发展前景[J]. 电机与控制应用, 2008, 35(4): 1-5, 21. Xue Yushi, Han Li, Li Hui．Overview on direct-drive permanent magnet synchronous generator for wind power[J]. Electric Machines & Control Application, 2008, 35(4): 1-5, 21. [4] Liserre M, Cardenas R, Molinas M, et al. Overview of Multi-MW Wind Turbines and Wind Parks[J]. IEEE Transactions on Industrial Electronics, 2011, 58(4): 1081-1095. [5] 汪令祥, 张兴, 张崇巍, 等．基于位置观测的直驱系统无速度传感器技术[J]. 电力系统自动化, 2008, 32(12): 78-82. Wang Lingxiang, Zhang Xing, Zhang Chongwei, et al. A sensorless control method for direct drive wind turbines based on position observation[J]. Automation of Electric Power Systems, 2008, 32(12): 78-82. [6] 胡书举, 王剑飞, 赵栋利, 等. 无速度传感器控制永磁直驱风电变流器的研制[J]. 电机与控制学报, 2009, 13(1): 67-72. Hu Shuju, Wang Jianfei, Zhao Dongli, et al. Development on sensorless control based Back-to-Back converter for direct-driven WECS using PMSG[J]. Electric Machines & Control, 2009, 13(1): 67-72. [7] 唐芬, 金新民, 姜久春, 等. 兆瓦级直驱型永磁风力发电机无位置传感器控制[J]. 电工技术学报, 2011, 26(4): 19-25. Tang Fen, Jin Xinmin, Jiang Jiuchun, et al. Sensorless control of MW-level direct-drive permanent magnet wind generator[J]. Transactions of China Electro- technical Society, 2011, 26(4): 19-25. [8] 陈瑶. 直驱型风力发电系统全功率并网变流技术的研究[D]. 北京: 北京交通大学, 2008. [9] Hu J, Wu B. New integration algorithms for estimating motor flux over a wide speed range[J]. IEEE Transaction on Power Electronics, 1998, 13(1): 125-133. [10] 贾洪平. PMSM DTC无传感器运行及传感器集成研究[D]. 杭州: 浙江大学, 2006. [11] 刘军锋, 李叶松, 万淑芸. 基于U-I模型的感应电机定子磁链观测方法研究[J]. 电气传动, 2008, 38(4): 20-24. Liu Junfeng, Li Yesong, Wan Shuyun．Research of induction motor stator flux observation method based on U-I model[J]．Electric Drive, 2008, 38(4):20-24．
2012, Vol. 27 
