考虑继电保护隐性故障的电力系统连锁故障风险评价.pdf

30 卷 13 期 电 网 技 术 Vol. 30 No. 13 2006 年7 月 Power System Technology Jul. 2006 文章编号：1000-3673 （2006 ）13-0014-06 中图分类号：TM711 文献标识码：A 学科代码：4704051 考虑继电保护隐性故障的 电力系统连锁故障风险评估 陈为化，江全元，曹一家 （浙江大学 电气工程学院，浙江省 杭州市 310027 ） Risk Assessment of Power System Cascading Failure Considering Hidden Failures of Protective Relayings CHEN Wei-hua ，JIANG Quan-yuan，CAO Yi-ji a （College of Electrical Engineering，Zheji ang University，Hangzhou 310027，Zheji ang Province，China ） ABSTRACT: Cascading failure is one of the main causes of 节点系统的应用结果证明了该方法的可行性及软件的有效性。 blackout. The authors propose an integrated approach to assess 关键词：连锁故障；风险评估；蒙特卡罗法；隐性故障；电 the risk of power system cascading failure considering hidden 力系统 failures in protection system. Two probability models of 0 引言 protection system hidden failures are used to demonstrate their effects on power system risk. The mechanism and scheme of 复杂电力系统和电力市场的发展在带来明显 protection system have been analyzed for their contribution to 经济效益的同时也对电力系统的安全提出了严峻 cascading failures after fault occurs. The risk of power system 的挑战。近年来，电力系统发生灾难性连锁故障的 cascading failure is assessed by bus isolated risk, load isolated 次数明显增多。所谓连锁故障是指系统中某一元件 risk, grid break-up risk and integrated system risk, on this basis 故障导致一系列其它元件停运，这种连锁反应迅速 the preventive measures to re