现代电力2024，Vol.41Issue(2)：249-257,9.DOI:10.19725/j.cnki.1007-2322.2022.0239
运行方式改变后弱阻尼特征模式的快速计算方法
Fast Weak Damping Eigenmode Calculation of Varying Operating Conditions
摘要
Abstract
With the increasing penetration of renewable en-ergy resources and flexible loads,the damping characteristics of critical electromechanical eigenmodes change with the time in-variant operating conditions of power systems.When it comes to the dynamic stability evaluation,the QR method is accurate,but fails to satisfy the needs for online tracing.In order to cal-culate the time-varying eigenmodes,this paper proposes a method to reduce the state matrix order of the system via iner-tia equivalence.All state variables of an eigenmode are mapped to a new sub-space upon the modal clusters.However,the pat-tem matching and modal varying of eigenvalues in the calcula-tion may lead to discontinuous results.To solve the problems,the relevant factor index of the dominant clusters is proposed and a framework is built to achieve fast calculation of critical eigenvalues in different conditions.The critical eigenmode cal-culation method is tested in the IEEE 145-bus system,and the simulation results demonstrate its accuracy and rapidity.关键词
机电振荡/特征值计算/模态分析/惯量等值Key words
electromechanical oscillation/eigenvalue calcu-lation/modal analysis/inertia equivalence分类
信息技术与安全科学引用本文复制引用
刘昀,许瑨,李兆伟..运行方式改变后弱阻尼特征模式的快速计算方法[J].现代电力,2024,41(2):249-257,9.基金项目
南京工程学院校级科研基金(YKJ202108).Nanjing Institute of Technology Scientific Research Fund(YKJ202108). （YKJ202108）
