电工技术学报  2017, Vol. 32 Issue (10): 241-251    DOI:
电力系统及其自动化 |
基于广域测量系统的交直流系统Markov切换控制器设计
刘子文, 冉晓洪, 苗世洪
强电磁工程与新技术国家重点实验室(华中科技大学) 武汉 430074
Design of Markov Switching Controller of AC-DC Power System Based on Wide Area Measurement System
Liu Ziwen, Ran Xiaohong, Miao Shihong
State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 China
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摘要 高压直流输电的附加调制功能可以明显改善交直流混联系统的稳定性。远方反馈信息的不健全和时滞的影响,严重降低了控制器的控制性能和系统的安全稳定性。而电力系统运行状态发生随机跳变时,系统的精确模型更加难以得到,系统可能由于仍采用跳变前的控制策略而失稳。通过考虑交直流混联系统的复杂动态交互行为与广域测量系统的时变时滞特性,利用全状态反馈线性化理论,建立能反映交直流混联系统实时运行状态的Markov切换模型与时滞控制模型,并提出状态转移矩阵未知条件下非线性Markov切换控制策略,设计其稳定控制器。研究结果表明,所提出的基于Markov切换模型的交直流混联系统非线性控制方法可显著提高系统的控制性能,又具有一定的时滞鲁棒性。
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刘子文
冉晓洪
苗世洪
关键词 交直流混联系统 Markov切换控制 时变时滞 状态转移矩阵 广域测量系统    
Abstract:Additional modulation function of high-voltage direct current (HVDC) can significantly improve the stability of hybrid AC-DC power system. But the time-delay problem reduces the control performance of the controller severely. Meanwhile, the random jump of operation states may lead to system instability because it is more difficult to acquire the accurate model and the control strategy is not effective after jumping. Considering the complicated dynamic interaction of hybrid AC-DC power system and time-varying time-delay, the Markov switching model and time-delay control model are established using the full state feedback linearization. And then a nonlinear Markov switching control is proposed with unknown state transferring matrix. Simulation results show that the proposed model and control strategy can significantly improve system stability. The robustness of time-delay control method is hence proved.
Key wordsHybrid AC-DC power system    Markov switching control    time-varying time-delay    state transition matrix    wide area measurement system   
收稿日期: 2015-09-01      出版日期: 2017-05-26
PACS: TM72  
基金资助:国家自然科学基金资助项目(51377068)
通讯作者: 苗世洪 男,1963年生,博士,教授,博士生导师,研究方向为电力系统继电保护与运行控制、微电网与配电网新技术等。E-mail: shmiao@mail.hust.edu.cn   
作者简介: 刘子文 男,1991年生,博士研究生,研究方向为交直流系统协调控制、电力系统运行与控制。E-mail: jshalzw@163.com
引用本文:   
刘子文, 冉晓洪, 苗世洪. 基于广域测量系统的交直流系统Markov切换控制器设计[J]. 电工技术学报, 2017, 32(10): 241-251. Liu Ziwen, Ran Xiaohong, Miao Shihong. Design of Markov Switching Controller of AC-DC Power System Based on Wide Area Measurement System. Transactions of China Electrotechnical Society, 2017, 32(10): 241-251.
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