直流微电网分布式控制的时滞稳定化设计

发布时间：2018-05-17 12:33

  本文选题：直流微电网 + 分布式控制　； 参考：《控制理论与应用》2017年08期

【摘要】：直流微电网中,大部分控制器在设计时未考虑通信延时对系统性能的影响,这可能会导致控制器在实际应用中失效甚至影响系统的稳定性.本文基于一种分布式控制策略,建立了直流微电网系统的时滞模型,重点研究了通信延时对系统稳定性的影响.结合Razumikhin稳定性理论,提出了一种针对时变时滞系统的全时滞稳定性判据.为了更加适用于实际系统,在另一种全时滞稳定性判据的基础上,对系统时滞相关稳定性进行分析,得到保证系统稳定的延时上界,进而给出了一种确定控制参数范围的方法.与传统的将通信延时处理为一阶惯性环节的分析方法相比,基于时滞系统的分析方法更切合实际,为系统的稳定运行提供了一个更宽的时滞范围,提高了系统的可靠性.仿真和实验结果表明本文提出的控制参数设计方法能保证系统在最大延时下的稳定运行.
[Abstract]:In DC microgrid, most controllers are designed without considering the effect of communication delay on system performance, which may lead to the failure of controller in practical application and even affect the stability of the system. Based on a distributed control strategy, the delay model of DC microgrid system is established in this paper, and the influence of communication delay on the stability of the system is studied. Based on Razumikhin stability theory, a full delay stability criterion for time-varying time-delay systems is proposed. In order to be more suitable for practical systems, the delay-dependent stability of the system is analyzed on the basis of another stability criterion with full delay, and the upper bound of delay is obtained to ensure the stability of the system, and a method to determine the range of control parameters is given. Compared with the traditional analysis method which treats the communication delay as the first order inertial link, the analysis method based on the time-delay system is more practical, which provides a wider time-delay range for the stable operation of the system and improves the reliability of the system. Simulation and experimental results show that the proposed control parameter design method can ensure the stable operation of the system under the maximum delay.
【作者单位】： 中南大学信息科学与工程学院;
【基金】：国家自然科学基金项目(51677194) 国家高技术研究发展计划项目(“863”计划)(2015AA050604) 湖南省重点科技计划项目(2016GK2039)资助~~
【分类号】：TM727
，

本文编号：1901388