电力系统时滞稳定判据保守性差异量化评估方法

发布时间：2018-01-29 15:11

本文关键词： 时滞稳定性稳定判据 Lyapunov函数保守性差异性　出处：《电力系统自动化》2017年10期 　论文类型：期刊论文

【摘要】：基于Lyapunov稳定理论的时滞稳定判据,已被广泛应用于各类电力系统时滞稳定性分析。由于采用了不同的Lyapunov函数和不同的推导过程,不同的稳定判据往往会具有不同的外在形式、计算效率和保守性。文中借助数值计算方法和可视化技术,分析揭示不同时滞稳定判据在保守性方面表现各异的内在原因,为寻求更为科学的时滞稳定判据提供支撑。首先,在简单回顾时滞系统模型的基础上,引出几种常用的时滞稳定判据。进一步,借助时滞系统仿真数据引入了3类反映系统运行差异性的指标,并给出了一种用于评估电力系统时滞稳定判据保守性的数值计算方法。最后,通过一阶典型单时滞系统详细说明了该评估方法的应用过程,并利用单机无穷大单时滞系统和3机9节点时滞系统验证所提方法在多维系统及多时滞场景下的有效性。
[Abstract]:The time-delay stability criterion based on Lyapunov stability theory has been widely used in the time-delay stability analysis of various power systems because of the different Lyapunov functions and different derivation processes. Different stability criteria often have different external forms, computational efficiency and conservatism. In this paper, numerical methods and visualization techniques are used. The analysis reveals the internal reasons for the different time-delay stability criteria in terms of conservatism, and provides the support for seeking more scientific time-delay stability criteria. First, based on a simple review of the time-delay system model. Several commonly used time-delay stability criteria are introduced. Further, three kinds of indexes are introduced to reflect the difference of system operation with the help of the simulation data of the time-delay system. A numerical method for evaluating the conservativeness of time-delay stability criterion of power system is presented. Finally, the application process of this method is explained in detail through the first-order typical single-time-delay system. The effectiveness of the proposed method in multi-dimensional systems and multi-time-delay scenarios is verified by using single-machine infinite single-time-delay systems and 3-machine 9-node time-delay systems.
【作者单位】：智能电网教育部重点实验室(天津大学);
【基金】：国家自然科学基金资助项目(51277128) 国家高技术研究发展计划(863计划)资助项目(2015AA050403)~~
【分类号】：TM712
【正文快照】： 上网日期:2017-02-22。0引言电力系统未来的发展趋势由当前和过去时刻的状态共同决定,这类现象称为时滞[1-3]。随着电网互联范围的不断增大,广域协调控制成为保证复杂电力系统安全运行的一种重要手段,受到越来越多的关注。在广域控制系统中,远方量测信号会存在显著时滞,这些时

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