基于PMU硬软件概率模型的WAMS可靠性评估  

Reliability Assessment of WAMS Based on a Combined Hardware and Software Probability Model of Phasor Measurement Units

作　　者：赵鑫[1] 卢继平[1] 汪洋[1] 彭静 何峰[3] 魏宏竹 

机构地区：[1]重庆大学电气工程学院输配电装备及系统安全与新技术国家重点实验室,重庆市400044 [2]重庆江北供电局,重庆市401147 [3]宁夏电力公司宁东供电局,宁夏回族自治区宁东市750411 [4]重庆电力公司重庆电网检修分公司,重庆市400015

出　　处：《电力系统自动化》2009年第16期19-23,70,共6页Automation of Electric Power Systems

基　　金：国家重点基础研究发展计划(973计划)资助项目(2004CB217908)~~

摘　　要：基于同步相量测量单元(PMU)的广域测量系统(WAMS)是一种综合了同步PMU和通信技术的广域网络。文中分析了WAMS的网络结构和PMU的结构原理,根据WAMS的功能特点建立了PMU的硬软件失效概率模型和考虑节点可靠性的WAMS可靠性模型。利用WAMS连通可靠性的评估方法,在考虑PMU节点可靠性的情况下,用节点遍历法和不交化法计算出源宿点的最小路集,然后用频率时间法计算出整个网络连通可靠性、平均故障间隔时间等可靠性指标。以河南电网某实际WAMS网络为算例进行评估仿真,得到单个PMU的可用度和整个网络的连通可靠性,以及网络节点和链路的关键度等可靠性指标,为确定WAMS的薄弱环节提供依据。Wide area measurement system （WAMS） networks based on phasor measurement unit （PMU） are a combination of both PMUs and communication technologies. Consequently, they are likely to suffer many different types of failures. A model is described for assessing and comparing the reliability and availability of wide area networks. The model parameters include the reliabilities of the hardware and software components and the network topology considering node＇ s failures. An evaluation method for WAMS network connectivity reliability is presented. All the minimal path sets of source-destination node pair in the network are calculated by using the minimal path set method. The connectivity reliability of source-destination node pairs is obtained through probabilistic analysis. By calculating a practical WAMS in Henan power grid, the availability of one PMU, and other reliability indices of WAMS are obtained, which can be used as a reference to evaluate the weakest component in the network comprehensively. This work is supported by Special Fund of the National Basic Research Program of China （No. 2004CB217908）.

关 键 词：PMU 软件失效 最小路集 平均故障间隔时间 可靠性评估 

分 类 号：TM764[电气工程—电力系统及自动化] TM732