二三道防线中切机措施对失步振荡中心的影响  

Influence of generator-shedding measures on out-of-step oscillation center in the second and third defense line

作　　者：吕熹[1] 杨明玉[1] 周宗川[2] 李东 董晓晶[2] 赵亮[2] 宋云亭[4] LV Xi;YANG Mingyu;ZHOU Zongchuan;LI Dong;DONG Xiaojing;ZHAO Liang;SONG Yuntin(North China Electric Power University(Baoding),Baoding Hebei 071000,China;China Electric Power Research Institute,Beijing 100085, China;Power Economic Research Institute of State Grid Ningxia Power Co., Yinchuan Ningxia 750011, China;North China Electric Power University(Beijing),Changping Beijing 102200, China)

机构地区：[1]华北电力大学(保定),河北保定071000 [2]国网宁夏电力公司经济技术研究院,宁夏银川750011 [3]华北电力大学(北京),北京昌平102200 [4]中国电力科学研究院,北京100085

出　　处：《宁夏电力》2016年第4期1-8,23,共9页Ningxia Electric Power

基　　金：国家电网公司大电网重大专项资助项目课题(SGCC-MPLG001-2012);国家电网公司总部科技项目"川藏联网及西北弱交流系统安全稳定特性及控制技术研究"

摘　　要：电网多重故障下,二三道防线切机措施可能对失步振荡中心产生影响,并严重影响电力系统安全稳定运行。本文先从理论上分析得到二三道防线切机措施影响失步振荡中心迁移的规律,再以实际电网为研究对象,基于BPA仿真计算,研究多重故障下不同切机措施机组类型、位置、数量等差异对失步振荡中心的影响,并提出安控切机建议措施和高频切机优化方案。分析结果表明:在失步振荡过程中,二三道防线切机措施会影响失步振荡中心朝切机侧迁移。因此,在安控切机措施中应尽量避免切除振荡中心附近大容量火电机组,在高频切机方案中应先切除稳定性能较差的机组。The out-of-step oscillation center may be influenced by generator-shedding of second and third defense line with multiple faults in power grid, which seriously affect the safety and stability of power system. In this paper, generator-shedding influence on out-of-step oscillation center migration is researched on theory and simulation. The actual power grid is studied to analyze the influence factors, such as the generator position, capacity, and type in generator-shedding. Based on the theory and BPA simulation, suggested measures are proposed. The oscillation center under generatorshedding will be migrated to the generator side, large capacity thermal power generations which near the oscillation center should not be cut, and vulnerable generators should be cut quickly.

关 键 词：安控切机 高频切机 失步解列 振荡中心迁移 

分 类 号：TM732[电气工程—电力系统及自动化]