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.
出处
《电力系统自动化》
EI
CSCD
北大核心
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)~~
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
compact transmission line
series compensation
sub-synchronous resonance
eigenvalue analysis
multi-mode resonance
