基于广域测量系统的交直流系统Markov切换控制器设计

发布时间：2019-06-29 16:26

【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。
[Abstract]:The additional modulation function of HVDC can obviously improve the stability of AC / DC hybrid system. The imperfect remote feedback information and the influence of time delay seriously reduce the control performance of the controller and the security and stability of the system. However, when the operation state of the power system changes randomly, the accurate model of the system is more difficult to obtain, and the system may be unstable because of the control strategy before the jump. By considering the complex dynamic interaction behavior of AC / DC hybrid system and the time-varying time-delay characteristics of wide area measurement system, the Markov switching model and time-delay control model which can reflect the real-time operation state of AC / DC hybrid system are established by using the full state feedback linearization theory, and the nonlinear Markov switching control strategy under the condition of unknown state transition matrix is proposed, and its stability controller is designed. The results show that the proposed nonlinear control method for AC / DC hybrid systems based on Markov switching model can significantly improve the control performance of the system and has certain time delay robustness.
【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学);
【基金】：国家自然科学基金资助项目(51377068)
【分类号】：TM721.3

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