中国电机工程学报2011，Vol.31Issue(28)：87-94,8.
有限长均匀链式电力系统中机电扰动传播分析
Analysis on Electromechanieal Disturbance Propagation in a Finite-length Uniform Chain Discrete Power System
摘要
Abstract
In order to grasp the essence of electromechaincal disturbance propagation in a power network, based on a finite length uniform chain discrete power system, the reflection characteristics of electromechanical disturbance propagation were studied after the machine internal impedance was neglected. Utilizing the Laplace transformations, the analytical expressions of the machine rotor＇s angle increments and power increments at all buses were derived under the impacts of disturbance with the form of the unit-impulse function and the unit-step one. At the same time, the reflection formula of electromechanical disturbance propagation in the discrete model was also presented, as the same as that of electromechanical wave propagation in the continuum model. All of these above show that the electromechanical dynamics of power system can be represented by the multiple superpositions of the reflections process of electromechanical disturbance propagation. Finally, the conclusions presented in this paper are validated through a simulation case, as have some theoretical meanings for understanding the time-space distribution characteristics of large-scale power systems＇ frequency and revealing the internal mechanisms of electromechanical dynamic phenomena.关键词
电力系统/机电扰动传播/反射系数/机电动态/贝塞尔函数/拉普拉斯变换Key words
power system/electromechanical disturbance propagation/reflection coefficient/electromechanical dynamics/Bessel functions/Laplace transformation分类
信息技术与安全科学引用本文复制引用
王德林,王晓茹..有限长均匀链式电力系统中机电扰动传播分析[J].中国电机工程学报,2011,31(28):87-94,8.基金项目
基金项目：国家自然科学基金项目（50937002)：高等学校博士学科点专项科研基金资助项目（200806131023) （）
中央高校基本科研业务费专项资金项目（SWJTU09CX029,SWJTU09ZT10). （）
