A numerical method to evaluate power system global stability determined by limit cycle
A numerical method to evaluate power system global stability determined by limit cycle
复制标题
极限环确定的电力系统全局稳定性评价数值方法
DOI：
--
复制
发表时间：
2004
影响因子：
6.6
通讯作者：
K. Tsuji
中科院分区：
文献类型：
--
作者：
M. Watanabe;Y. Mitani;K. Tsuji
提出了一种研究具有多个主导振荡模式的多机电力系统全局稳定性的方法。利用Hopf分支理论预测了由不稳定极限环形成的全局稳定边界。研究了一种通过获取功率波动数据来分析电力系统非线性特性的数值方法，其中非线性多项式项的系数由最小二乘法确定。本文还提出了一种适用于纵向互联多机大系统的改进方法。数值算例表明，该方法可以分析模态相互作用对电力系统非线性结构的影响以及系统的Hopf分岔特性。
This paper presents a method to investigate a global stability in a multi-machine power system with multiple dominant power oscillation modes. The global stability boundary formed by an unstable limit cycle is predicted by means of Hopf bifurcation theory. The authors have investigated a numerical method to analyze the nonlinear characteristics in power systems by acquiring the power swing data where the coefficients of nonlinear polynomial terms are determined by the least squares method. A modified method has been also developed for the application to large-scale multi-machine power systems with longitudinally interconnected configuration. Numerical examples illustrate that the influence of the modal interaction on the nonlinear structure of the power system as well as the Hopf bifurcation characteristics can be evaluated by the proposed method.