电力系统强迫振荡的频率时空变化特性研究与扰动源定位  

Research for Space-time Variational Features of Frequency for Power System Forced Oscillations and Disturbance Source Location

作　　者：胡楠[1] 李兴源[1] 杨毅强[1] 郭晓江[2] 李宽[1] 肖俊[1] 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]中国电力科学研究院,北京市100192

出　　处：《四川大学学报（工程科学版）》2013年第6期135-142,共8页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家高技术研究发展计划资助项目(2011AA05A119);国家电网公司大电网重大专项资助项目(SGCC-MPLG027-2012)

摘　　要：为准确分析电力系统发生强迫振荡后系统各机组的特性,从而进行扰动源准确定位,研究了各扰动源机组、扰动源区域内外各机组母线频率变化时空特性。通过等效模型推导频率增量中各振荡分量初始相位的差别,它决定了各机组频率增量在扰动开始后第1次到达振荡极值的时间差别。理论分析可知,扰动源机组总是第一个到达扰动后的初次振荡极值,区域内外机组与扰动源机组到达极值的时间差由区域内与区域间振荡频率的初始相位差和频率本身大小决定。实际电网仿真结果表明,利用频率时空变化特性能够有效分析强迫振荡并实现扰动源定位。The space-time distribution features of frequency responses were proposed to analyze varieties between the disturbing source generator and generators in the same/different areas in power system forced oscillations. The oscillating components of various frequency increments had different initial phases which resulted in different time of the first oscillating extreme value for the frequency increments in forced oscillation. The frequency increments of the disturbing source generator always achieved its first oscillating extreme value earli- er than which of other generators. The delays of other generators in the same area with the disturbing source generator were determined by the value and initial phase of intra-area oscillating frequency, meanwhile, the delays of other generators in another area with the dis- turbing source generator were determined by the value and initial phase of inter-area oscillating frequency. Both the theoretical and prac- tical case study showed that utilizing space-time distribution features of variational frequency responses could analyze forced oscillation effectively and locate disturbing source generator.

关 键 词：强迫振荡 时空变化 初次极值 扰动源定位 

分 类 号：TM744[电气工程—电力系统及自动化]