群内非同调对主导模式暂态稳定性的影响分析  

Influence analysis of interior non-coherence of leading generator cluster to the transient stability of dominant mode

作　　者：崔晓丹[1,2,3] 李兆伟[1,2] 方勇杰[1,2,3] 李威[1,2] 李碧君[1,2] 吴雪莲[1,2] 张红丽[1,2] 

机构地区：[1]南瑞集团公司(国网电力科学研究院),江苏南京211106 [2]智能电网保护和运行控制国家重点实验室,江苏南京211006 [3]中国电力科学研究院,北京100192

出　　处：《电力系统保护与控制》2016年第21期61-70,共10页Power System Protection and Control

基　　金：国家电网公司大电网重大专项资助项目课题(SGCC-MPLG003-2012);国家电网公司科技项目"基于稳定性量化分析的大电网多断面暂态稳定交互影响及协调控制技术研究"

摘　　要：针对电网跨区互联背景下出现的复杂暂态失稳现象,研究了群内非同调对主导模式暂态稳定性的影响。基于等值系统模型和EEAC原理,推导了链式结构系统下领前群内机组非同调对主导模式稳定性影响的主要因素,定性分析了各因素的影响规律,并基于简单系统和实际电网的算例进行仿真分析。理论和仿真研究表明,领前群非同调程度扩大总体上不利于主导模式的暂态稳定性,且群内非同调对主导模式暂态稳定性的影响作用大小与系统结构参数、系统运行方式、具有非同调特征群内机组惯量分配等因素有关。The influence of interior non-coherence of leading generator cluster to the transient stability dominant mode is studied to deal with the complex transient instability under the background of interregional interconnection of power grid. Based on the equivalent system model and EEAC theory, the influence factors of interior non-coherence of leading generator cluster to transient stability of dominant mode is deduced when the system has the chain structure, the influence rules of each influence factor is given qualitatively, and simulation example of simple system and real power grid is studied lastly. The theoretical and simulation results show that expansion of interior non-coherence of leading generator cluster has an adverse impact on system transient stability, and this impact is associated with structure parameter, operation mode of power grid, and the inertia distribution of leading generator cluster which has the characteristic of interior non-coherence.

关 键 词：暂态稳定 主导模式 失稳模式 非同调 EEAC 影响因素 

分 类 号：TM712[电气工程—电力系统及自动化]