电力系统保护与控制2011，Vol.39Issue(8)：6-10,5.
基于EMD和SSI的电力系统低频振荡模态参数识别方法
Method of modal parameter identification of power system low frequency oscillation based on EMD and SSI
摘要
Abstract
A new method for indentifying power system low-frequency oscillation modal parameters is proposed based on EMD and SSI towards mechanisms which caused the low frequency oscillation. This method can identify the modal parameters of low-frequency oscillation directly according to measured terminal data. When the system running in normal operation or small disturbance, using SSI can get theweakly damped patterns, frequency, damping and vibration mode directly: when the system running in fault state or abnormal operation, the measured data are filtered and smoothed by using EMD, the corresponding state matrix is identified by SSI, and the above modal parameters of low frequency oscillation are obtained by modal analysis. Both numerical simulations and example analysis indicate that using this method it runs fast and detects accurately. It provides a new idea and method to study low frequency oscillation problem in power systems.关键词
低频振荡/经验模态分解/时空滤波/随机子空间/振型Key words
low frequency oscillation/ EMD/ space-time filter/ SSI/ vibration model分类
信息技术与安全科学引用本文复制引用
李天云,袁明哲,李军强,袁金腾,蔡国伟,钱康..基于EMD和SSI的电力系统低频振荡模态参数识别方法[J].电力系统保护与控制,2011,39(8):6-10,5.基金项目
国家自然科学基金项目(50777007) （50777007）
