摘 要:电力系统中的次同步振荡是一类严重的系统稳定性问题,不但会使系统产生振荡现象,而且极易造成汽轮发电机组的大轴损毁.以往提出的基于系统线性化方程的小扰动分析方法不能考虑直流系统的非线性因素,而且在实际复杂系统中的应用非常困难.为解决上述问题,对复杂交、直流系统的次同步振荡特性做出准确和全面的分析,对以往提出的暂态力矩时域仿真计算方法及复转矩系数仿真求解方法进行拓展.以2008年贵州电网为例,采用时域与频域相结合的分析方法对这一复杂交直流混合输电系统的次同步振荡特性进行研究,确定该系统可能发生次同步振荡的运行方式.现在的电力系统结构日趋复杂,所提供的分析方法为今后复杂交、直流输电及含有FACTS(灵活交流输电系统)装置的输电系统的次同步振荡特性分析提供了参考.
关键词:次同步振荡;交、直流混合输电系统;仿真计算
分类号:TM71 文献标识码:A
文章编号:1004-9649(2007)05-0013-06
Analysis methods of sub-synchronous oscillation in time and frequency domains
WU Ling-yun LI Xing-yuan SUN Qu YANG Yu HONG Chao CHAO Jian KANG Peng
基金项目:国家自然科学基金资助项目(50595412、50577044);国家重点基础研究专项经费资助项目(2004CB217907);南方电网技术研究中心项目
作者简介:伍凌云(1976-),男,四川成都人,博士研究生,从事高压直流输电的研究工作.E-mail:wu_lyun@163.com
作者单位:伍凌云(四川大学,电气信息学院,四川,成都,610065)
李兴源(四川大学,电气信息学院,四川,成都,610065)
孙衢(四川大学,电气信息学院,四川,成都,610065)
杨煜(南方电网技术研究中心,广东,广州,510623)
洪潮(南方电网技术研究中心,广东,广州,510623)
晁剑(贵州电网公司,贵州,贵阳,550002)
康鹏(贵州电网公司,贵州,贵阳,550002)
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