Research on large-scale cascading failure of power systems using synergistic effect  

基于协同效应的电力系统大规模连锁故障研究(英文)

作　　者：李扬[1] 苏慧玲[1,2] 孙宇军 窦迅[3] 

机构地区：[1]东南大学电气工程学院,南京210096 [2]国网江苏省电力公司电力科学研究院,南京211103 [3]南京工业大学自动化与电气工程学院,南京211816

出　　处：《Journal of Southeast University(English Edition)》2014年第1期32-38,共7页东南大学学报（英文版）

基　　金：The National Natural Science Foundation of China(No.51277028)

摘　　要：This paper discusses the primary causes from the point of synergistic effects to improve power system vulnerability in the power system planning and safety operation. Based on the vulnerability conception in the complex network theory the vulnerability of the power system can be evaluated by the minimum load loss rate when considering power supply ability.Consequently according to the synergistic effect theory the critical line of the power system is defined by its influence on failure set vulnerability in N-k contingencies.The cascading failure modes are proposed based on the criterion whether the acceptable load curtailment level is below a preset value.Significant conclusions are revealed by results of IEEE 39 case analysis weak points of power networks and heavy load condition are the main causes of large-scale cascading failures damaging synergistic effects can result in partial failure developed into large-scale cascading failures vulnerable lines of power systems can directly lead the partial failure to deteriorate into a large blackout while less vulnerable lines can cause a large-scale cascading failure.为改善电力系统脆弱性并服务于电网规划和系统安全运行,从系统协同效应的角度探讨连锁故障的发生机理.基于复杂网络脆弱性理论,考虑电力系统的供电能力,采用最小失负荷率建立电力系统脆弱性模型.然后基于协同效应理论,考虑N-k故障情况,建立电力系统线路关键性模型,以分析影响脆弱性的关键线路.通过设置允许切负荷水平值,建立电力系统过负荷情况下的连锁故障模型.采用IEEE39算例分析验证了所提方法的有效性.分析结果表明:电网结构的薄弱点及重负荷是诱发大规模连锁故障的主要原因;高脆弱线路能够直接导致大停电事故,而低脆弱线路能够导致大规模连锁故障的发生.

关 键 词：synergistic effect cascading failure power system vulnerability critical line load loss rate 

分 类 号：TM71[电气工程—电力系统及自动化]