具有容错性能的广域后备保护算法  

Wide Area Backup Protection Algorithm with Fault-tolerance Performance

作　　者：张保会[1] 周良才[1] 汪成根[1] 薄志谦 

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049 [2]AREVA T&D Automation,Stafford,英国

出　　处：《电力系统自动化》2010年第5期66-71,共6页Automation of Electric Power Systems

基　　金：国家高技术研究发展计划(863计划)资助项目(2006AA05Z247);国家自然科学基金资助项目(50595413)~~

摘　　要：广域信息采集易受干扰而出现信息丢失或信息畸变,现有广域保护理论对此考虑不足,文中提出了一种高容错性的广域后备保护算法,用于变电站集中式后备保护。集中式后备保护系统根据本站元件电压、电流信息计算得到的故障方向信息和故障距离信息,以及从相邻变电站收集到的故障方向信息和故障距离信息,通过容错判别来确定故障位置。算例表明,当保护范围内任何一个保护元件误动、拒动或其故障信息丢失时不会造成后备保护系统的错误判别。该算法简单可靠,具有极高的容错性。Wide area information is easily lost and distorted caused by disturbance,which is not fully considered in current wide area protection principle.A wide area backup protection algorithm with high fault-tolerance performance is proposed to implement the centralized substation backup protection system（CSBPS）.CSBPS can locate the fault element with fault-tolerance judgment according to fault direction and fault distance information calculated with currents and voltages measured from electric elements of local substation and collected from the adjacent substations.The results of a case study show that no uncorrected judgment happens to CSBPS in case any one of protection elements mal-operates,fails to operate or loss of fault information.The proposed algorithm is simple and reliable with good fault-tolerance capability.

关 键 词：广域信息 集中式后备保护 容错性 动作系数 

分 类 号：TM771[电气工程—电力系统及自动化]