基于证据理论的数字化变电站继电保护容错方法  

Evidence Theory Based Fault-Tolerant Method for Protective Relays in Digital Substations

作　　者：朱林[1] 段献忠[1] 苏盛[1] 李银红[1] 

机构地区：[1]华中科技大学电力安全与高效湖北重点实验室,武汉430074

出　　处：《电工技术学报》2011年第1期154-161,共8页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重大项目(50595414);国家科技支撑计划项目(2008BAA13B00)

摘　　要：在数字化变电站时代,过程层采样值信息的网络化传输和共享使得利用冗余信息快速识别错误数据成为可能。本文提出了一种对多源互感器数据进行综合分析以辨识错误数据,并防止继电保护装置误动的新方法。在介绍新方法基本原理的基础上,分析了证据的生成法则、融合信息的选取以及算法流程等关键问题,并对算法的有效性和实时性进行了仿真分析。仿真结果表明,所提方法可有效地防止错误数据引起的继电保护误动,信息融合算法与继电保护算法的时间相当,可形成并行处理。此外,该方法还可对数据采集系统进行在线监测和诊断。In digital substations,sampled values information in process level will be transmitted via shared communication network,which makes it possible to identify false data using redundant information.A new method based on information fusion theory is proposed to detect the false data and prevent protective relays from mal-operation.Some crucial issues of the method are introduced and analyzed,such as creation of evidence,selection of fusion information and flow chart of the fault-tolerant algorithm.Simulation results show the availability of the fault-tolerant method.The information fusion algorithm and protection algorithm can be processed concurrently because they spend nearly the same time on calculation.In addition,data collection systems can also be supervised and diagnosed online with this method.

关 键 词：继电保护容错 证据理论 数字化变电站 信息融合 证据可信度 

分 类 号：TM771[电气工程—电力系统及自动化]