Abstract：Wide area measurement system(WAMS) provides technology measure to effectively damp interarea low frequency oscillations in interconnected power systems, but its signal transmission delay may deteriorate damping performance and even cause system instability. In order to design flexible AC transmission systems(FACTS) damping controller in WAMS environment, a FACTS damping control model with signal transmission delay is constructed and a supplementary damping controller(SDC) intelligent optimization design method with the objective of maximizing damping ratio and delay margin is proposed. The method, based on multi-objective particle swarm optimization (MOPSO), can obtain fuzzy set based sorted Pareto solution set by adopting two-dimension Sigma leader strategy to accelerate particle searching and chaos variation operation to avoid trapping in local optima, which overcomes the disadvantages of suboptimal solution by previous controller synthesis algorithm in delay-dependent stabilization problem. Case studies on two-area four-generator interconnected power system demonstrate that FACTS damping controller obtained by the proposed method can effectively damp interarea oscillation as well as endure a certain signal transmission delay.
李婷, 吴敏, 何勇. 计及广域测量系统时滞影响的灵活交流输电系统阻尼控制器多目标设计[J]. 电工技术学报, 2014, 29(8): 227-234.
Li Ting, Wu Min, He Yong. Multi-objective Design of FACTS Damping Controller Based on WAMS with Signal Transmission Delay. Transactions of China Electrotechnical Society, 2014, 29(8): 227-234.
[1] 贺静波, 李立浧, 陈辉祥, 等. 基于广域信息的电力系统阻尼控制器反馈信号选择[J]. 电力系统自动化, 2007, 31(9): 6-10. He Jingbo, Li Licheng, Chen Huixiang, et al. Selection of feedback signal for power system damping controller based on wide area measurements [J]. Automation of Electric Power Systems, 2007, 31(9): 6-10. [2] Farsangi M M, Hossein N, Song Y H, et al. Placement of SVCs and selection of stabilizing signals in power systems[J]. IEEE Transactions on Power Systems, 2007, 22(3): 1061-1071. [3] 刘隽, 李兴源, 汤广福. SVC电压控制与阻尼调节间的相互作用机理[J]. 中国电机工程学报, 2008, 28(1): 12-17. Liu Jun, Li Xingyuan, Tang Guangfu. Interrelations between SVC voltage control and damping control[J]. Proceedings of the CSEE, 2008, 28(1): 12-17. [4] 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. Chang Yong, Xu Zheng. SVC supplementary controller based on wide area signals to enhance damping of inter-area oscillation[J]. Transactions of China Electrotechnical Society, 2006, 21(12): 40-46. [5] Simoes A M, Savelli D C, Pellanda P C, et al. Robust design of a TCSC oscillation damping controller in a weak 500kV interconnection considering multiple power flow scenarios and external disturbances[J]. IEEE Transactions on Power Systems, 2009, 24(1): 226-236. [6] Guo J, Crow M L, Sarangapani J. An improved UPFC control for oscillation damping[J]. IEEE Transactions on Power Systems, 2009, 24(1): 288-296. [7] Stahlhut J W, Browne T J, Heydt G T, et al. Latency viewed as a stochastic process and its impact on wide area power system control signals[J]. IEEE Transactions on Power Systems, 2008, 23(1): 84-91. [8] Michiels W, Niculescu S. Stability and stabilization of time-delay systems[M]. Philadelphia: SIAM, 2007. [9] He Y, Wang Q G, Lin C, et al. Delay-range-dependent stability for systems with time-varying delay[J]. Automatica, 2007, 43(2): 371-376. [10] He Y, Wang Q G, Xie L H, et al. Further improvement of free-weighting matrices technique for systems with time-varying delay[J]. IEEE Transactions on Automatic Control, 2007, 52(2): 293-299. [11] Wu M, Zhou L. Design of observer-based H∞ robust repetitive-control system[J]. IEEE Transactions on Automatic Control, 2011, 56(6): 1452-1457. [12] He Y, Wu M, Liu G P, et al. Output feedback stabilization for a discrete-time system with a time- varying delay[J]. IEEE Transactions on Automatic Control, 2008, 53(10): 2372-2377. [13] Li Ting, Wu Min, He Yong, et al. New delay- dependent steady state stability analysis for WAMS assisted power system[C]. Proceedings of the 29th Chinese Control Conference, Beijing, 2010: 5734- 5738. [14] Yao W, Jiang L, Wu Q H, et al. Delay-dependent stability analysis of the power system with a wide- area damping controller embedded[J]. IEEE Transac- tions on Power Systems, 2011, 26(1): 233-240. [15] 罗珂, 刘玉田, 叶华. 计及时滞影响的广域附加阻尼控制[J]. 电工技术学报, 2010, 25(11): 136-141. Luo Ke, Liu Yutian, Ye Hua. Wide area power system damping controller considering time-delay[J]. Transac- tions of China Electrotechnical Society, 2010, 25(11): 136-141. [16] Valle Y, Venayagamoorthy G K, Mohagheghi S, et al. Particle swarm optimization: basic concepts, variants and applications in power systems[J]. IEEE Transactions on Evolutionary Computation, 2008, 12(2): 171-195. [17] Coello C, Pulido G T, Lechuga M S. Handling multiple objectives with particle swarm optimization [J]. IEEE Transactions on Evolutionary Computation, 2004, 8(3): 256-279. [18] 郭成, 李群湛. 基于改进PSO算法的SSSC广域阻尼控制器设计[J]. 电工技术学报, 2010, 25(1): 151-158. Guo Cheng, Li Qunzhan. SSSC wide-area damping controller design based on improved particle swarm optimization[J]. Transactions of China Electrotechnical Society, 2010, 25(1): 151-158. [19] Kundur P. 电力系统稳定与控制[M]. 北京: 中国电力出版社, 2002.
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