基于协同效应分析的输电线路脆弱评估方法  

Transmission line vulnerability assessment based on synergetic effect analysis

作　　者：刘利民[1,2] 刘俊勇[1] 魏震波[1] 龚辉 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]国网长沙供电公司,湖南长沙410015

出　　处：《电力自动化设备》2016年第5期30-37,共8页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51261130472)~~

摘　　要：针对复杂电网薄弱环节辨识问题,从结构和状态两方面深入研究电力系统脆弱特性及其量化方法。在结构方面,基于复杂网络理论,结合电力系统特性,提出结构脆弱指标——源荷介数;在状态方面,利用输电裕度、功率过载和功率传输分布因子(PTDF)等概念,提出状态脆弱指标——线路故障功率过载量。通过分析系统结构与状态之间的关联关系,利用协同效应,提出计及结构和状态关联关系的线路综合脆弱性评估模型。新英格兰39节点系统和某500 k V网架系统仿真结果表明,结构与状态之间的关联性影响电网脆弱特性;与传统方法相比,所提模型具有更好的脆弱辨识能力,验证了模型的合理性。For identifying the weak part of complex network,the characteristics of power system vulnerability and its quantification method are researched in two aspects：structure and condition. As a structural vulnerability index,the power-load betweenness is proposed based on the complex network theory and the characteristics of power system. As a conditional vulnerability index,the transmission line power overload is proposed based on the concepts of transmission margin,power overload,PTDF（Power Transmission Distribution Factor）,etc. The correlation between system structure and condition is analyzed,based on which,an integrated vulnerability assessment model considering their synergetic effect is proposed. The simulative results of New England 39-bus system and a 500 k V system show that the correlation between structure and condition impacts the vulnerability of power system. Compared with the traditional methods,the proposed model has better vulnerability identification ability,verifying its rationality.

关 键 词：源荷介数 PTDF 结构脆弱性 状态脆弱性 协同效应 电力系统 输电线路 

分 类 号：TM711[电气工程—电力系统及自动化]