Abstract：For inter-area low-frequency oscillation (IALFO) in power system, a novel design strategy for power system damping controller employing time-delay wide-area measurements is proposed based on wide-area measurement system (WAMS) and flexible AC transmission system (FACTS) technology. Combining theories of delay-dependent state-feedback robust control and state observer, time-delay output feedback robust control is realized for wide-area power system. Take four-machine two-area power system as an example, an additive damping controller (ADC) for thyristor-controlled series capacitor (TCSC) is designed. Small signal analysis and time-domain simulation demonstrate that this controller can inhibit IALFO evidently. Meanwhile, it is insensitive to time delay and robust to operating conditions.
[1] 常勇, 徐政. SVC广域辅助控制阻尼区域间低频振荡[J]. 电工技术学报, 2006, 21(12): 40-46. [2] Balarko Chaudhuri, Bikash C Pal. Robust damping of multiple swing modes employing global stabilizing signals with a TCSC[J]. IEEE Transactions on Power Systems, 2004, 19(1): 499-506. [3] Chen He, Guo Zhizhong. LMI-based wide-area robust damping control[C]. IEEE/PES Transmission and Distribution Conference and Exhibition: Asia and Pacific, Dalian, China, 2005: 1-6. [4] Balarko Chaudhuri, Bikash C Pal, Argyrios C Zolotas, et al. Mixed-sensitivity approach to H∞ control of power system oscillations employing multiple FACTS devices[J]. IEEE Transactions on Power Systems, 2003, 18(3): 1149-1156. [5] 贾宏杰, 陈建华, 余晓丹. 时滞环节对电力系统小扰动稳定性的影响[J]. 电力系统自动化, 2006, 30(5): 5-8. [6] Wu Hongxia, Konstantinos S Tsakalis, Gerald Thomas Heydt. Evaluation of time delay effects to wide-area power system stabilizer design[J]. IEEE Transactions on Power Systems, 2004, 19(4): 1935-1941. [7] 江全元, 白碧蓉, 邹振宇, 等. 计及广域测量系统时滞影响的TCSC控制器设计[J]. 电力系统自动化, 2004, 28(20): 21-25. [8] Silviu-lulian Niculescu, Keqin Gu. Advances in time- delay systems[M]. Berlin: Springer-Verlag, 2004. [9] 苏宏业, 褚健, 等. 不确定时滞系统的鲁棒控制理论[M]. 北京: 科学出版社, 2007. [10] Zribi M, Mahmoud M S, Karkoub M, et al. H∞ controllers for linearised time-delay power systems[J]. IEE Proceedings on Generation, Transmission and Distribution, 2000, 147(5): 401-408. [11] 江全元, 张鹏翔, 曹一家. 计及反馈信号时滞影响的广域FACTS阻尼控制[J]. 中国电机工程学报, 2006, 26(7): 82-88. [12] 常勇, 徐政. 考虑多机系统广域信号时滞影响的直流附加控制器设计[J]. 电工技术学报, 2007, 22(5): 134-139. [13] 俞立. 鲁棒控制-线性矩阵不等式处理方法[M]. 北京: 清华大学出版社, 2002. [14] 刘叔军, 盖晓华, 樊京, 等. Matlab 7.0 控制系统应用与实例[M]. 北京: 机械工业出版社, 2006. [15] Palhares R M, Campos C D. Delay-dependent robust H∞ control of uncertain linear systems with lumped delays[J]. IEE Proceedings on Control Theory, 2005, 152(1): 27-33. [16] EI Ghaoui L, Oustry F, Ait Rami M.A cone comple- mentarity linearization algorithm for static output feedback and related problems[J]. IEEE Transactions on Automation Control, 1997, 42(8): 1171-1176. [17] Kundur P. 电力系统稳定与控制[M]. 北京: 中国电力出版社, 2001. [18] Mahmoud Chilali, Pascal Gahinet. H∞ design with pole placement constraints: an LMI approach[J]. IEEE Transactions on Automatic Control, 1996, 41(3): 358-367.
2009, Vol. 24 
