紧凑型线路参数特性对次同步谐振问题的影响  

Influence of Compact Transmission Line Parameter Characteristics on Sub-synchronous Resonance

作　　者：柴旭峥[1] 刘世宇[1] 姜齐荣[1] 谢小荣[1] 梁曦东[1] 

机构地区：[1]清华大学电机系电力系统国家重点实验室,北京市100084

出　　处：《电力系统自动化》2007年第10期11-15,共5页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2004CB217906)~~

摘　　要：紧凑型输电线路的电气参数与常规输电线路存在较大差异,因此分析其参数特性对次同步谐振(SSR)问题的影响,探讨应用串联补偿的紧凑型输电线路进行火电厂送出在SSR问题方面的利弊具有实际意义。以中国上都电厂二期送出的实际情况为背景,采用特征值分析法对问题进行分析,考虑了常规输电线路、紧凑型输电线路和高自然功率紧凑型输电线路参数条件下的SSR问题。研究结果表明:紧凑型输电线路可以比常规输电线路提供更宽的不发生SSR的串补度范围,加之其本身相当于常规线路27%补偿度的线路电感参数特性,使其在某些输送能力要求下采用合适的补偿方案可以避免SSR,同时也为采用大比例固定串补与小比例可控串补结合的方案抑制SSR的发生提供了较好的经济前景。As the parameter characteristics of compact transmission lines are quite different from those of conventional transmission lines, a study of their influence on sub-synchronous resonance （SSR）, the advantages and disadvantages of some series-compensated compact transmission lines for the heat-engine plant is of practical significance. With the transmission scheme of Shangdu Plant Project Ⅱ as our background and adopting the method of eigenvalue analysis, an investigation is made on the SSR in the compact transmission lines, conventional transmission lines and high surge-impedance-loading compact transmission lines. The results show that compact transmission lines are capable of providing a wider range for a SSR-free series compensation ratio than conventional transmission lines. What with the impedance of only 73% of the conventional transmission lines, compact transmission lines have good prospects for application in choosing appropriate compensation schemes and preventing SSR by TCSC.

关 键 词：紧凑型输电线路 串联补偿 次同步谐振 特征值分析 多模式振荡 

分 类 号：TM726[电气工程—电力系统及自动化] TM712