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电网技术  2007 

西北750kV电网动态稳定特性分析和控制策略

, PP. 63-68

Keywords: 750,kV电网,动态稳定性,小干扰稳定,Prony,分析,留数法

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Abstract:

分析了西北电网在2008年750kV骨干网架初步形成后西电东送方式下的动态稳定特性,并与目前西北电网的状况进行了比较。基于时域仿真法和小干扰稳定分析,以及Prony分析和留数法提出了西北750kV电网PSS配置及其参数优化整定方案。用中国电科院电力系统综合分析程序对750kV系统的稳定性进行了仿真计算,结果表明750kV骨干网架将提高西北电网的动态稳定性,但由于750kV网架还比较薄弱,当陕甘断面上的750kV联络线退出运行时,存在阻尼不足问题,可能诱发低频振荡,需要在电网中装设PSS以保证系统的安全稳定运行。结果表明了所提方案的有效性。

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