串联补偿输电系统次同步谐振的电气模态阻尼的参数敏感性分析  

Analysis of parametric sensitivity of electrical mode dampings for subsynchronous resonance in series compensated transmission system

作　　者：杨帆[1] 王西田[1] 陈陈[1] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200030

出　　处：《华东电力》2005年第6期22-27,共6页East China Electric Power

基　　金：国家重点基础研究专项经费(G1998020310);中国博士后基金(2003033301)资助项目

摘　　要：采用特征值分析法研究串联补偿系统平衡工况点的变化对次同步谐振(SSR)电气模态阻尼的影响。通过建立全系统线性化模型,计算并绘制了SSR电气模态阻尼(忽略了机械阻尼)相对于发电机有功功率和无功功率这两个平衡工况点运行参数以及补偿度这一结构参数分别构成的二维参数空间的轨迹曲面。分析结果显示,补偿度是影响SSR电气模态阻尼的主要因素,而发电机有功功率和无功功率对SSR电气模态阻尼的影响虽然数量级较小,但在一定条件下运行参数的变化有可能会改变SSR模态阻尼的正负性质,在分析SSR稳定性时,有必要考虑平衡工况点的变化。The influence of the variety of the operational equilibrium point on the electrical mode dampings of subsynchronous resonance(SSR) in series compensated transmission system is investigated by using eigenvalue analytical method. The curved surfaces of the SSR electrical mode dampings(mechanical mode dampings omitted) to the parameters plane were calculated and drawn by modelling the whole linear system. The parameters plane is composed of two of the operational parameters of the operational equilibrium point, the active and reactive power of generators, and one of the constructional parameters, the compensation degree. The result displays that the compensation degree is the main factor that influences the SSR electrical mode dampings. Though the influence of the active and reactive power on the SSR electrical mode dampings is slight in quantity, on certain condition the variety of the operational parameters can change the sign of the SSR mode damping. Therefore, it is necessary to take the variety of the operational equilibrium point into consideration when analyzing the SSR stability.This work is supported by National Key Basic Research Special Fund of China (No. G1998020310) and China Postdoctoral Science Foundation (No. 2003033301)

关 键 词：次同步谐振 电气模态阻尼 参数敏感性 串联补偿 

分 类 号：TM761[电气工程—电力系统及自动化]