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1、摘要在电力系统中，继电保护是保证电力系统安全运行和提高电能质量的重要工具，而且，电力系统的规模在不断扩大，用户对电能质量的要求也在不断提高。因此，对继电保护的要求也越来越高。高频保护是110kV及以上输电线路的主保护，也是高压电网保护的第一道防线，能够对全线路故障实现无时限切除，这是高频保护的重大优点，所以，在超高压电网的稳定措施中高频保护受到高度重视。本次的设计是110kV线路微机高频保护。本文首先简要介绍了电力系统微机继电保护的发展历史、现状、技术特点及其发展方向。接着详细论述了110KV线路微机继电保护的构成以及各个部分的工作原理，设计内容包
2、括三大部分：硬件电路设计，软件部分设计和高频保护参数计算及动作值整定。和件结构够硬件电路主要由CPU主系统、数据采集系统和开关量输入/输出系统构成，软件设计，主要包括高频保护的主程序、中断服务程序和故障处理程序设计，软硬件结合实现保护功能。关键词：继电保护；微机保护；高频距离保护；高频零序保护IVAbstractIntheelectricalpowersystem,therelayprotectionisguaranteedtheelectricalpowersystemsafeoperationandimprovestheelectricalen
3、ergyquality,moreover,theelectricalpowersystemscaleisexpandingunceasingly,theuserunceasinglyisalsoenhancingtotheelectricalenergyqualityrequest.Therefore,moreandmoreisalsohightotherelayprotectionrequest.Thehighfrequencyprotectionis110kVandabovetransmissionlinehostprotection,also
4、isthefirstdefenselinewhichthehightensionlineprotects,canrealizethenon-timelimitexcisiontotheentirelinefault,thisisthehighfrequencyprotectionsignificantmerit,therefore,receivesintheultrahighvoltageelectricalnetworkstablemeasureintermediatefrequencyprotectiontakeshighly.Thistime
5、designisthe110kVlinemicrocomputerhighfrequencyprotection.Thisarticlefirstwasbriefintroducedtheelectricalpowersystemmicrocomputerrelayprotectiondevelopmenthistory,thepresentsituation,thetechnicalcharacteristicandthedevelopmentdirection.Thenindetailelaboratedthe110KVlinemicrocom
6、puterrelayprotectionconstitutionaswellaseachpartofprincipleofwork,thedesigncontentincludingthreemajorparts:Hardwarecircuitdesign,softwarepartdesignandhighfrequencyprotectionparametercomputationandmovementvalueinstallation.HardwareelectriccircuitmainlybyCPUhostsystem,dataacquis
7、itionsystem,withswitchquantityinput/outputsystemconstitution,thesoftwaredesignmainlyincludesthehighfrequencyprotectionthemasterroutine,theinterruptserviceandthebreakdowndisposalproceduredesign,thesoftwareandhardwareunionrealizationprotectionfunction.Keywords：Relayprotection；Mi
8、crocomputerprotection；Highfrequencydistanceprotection；Highfre
