PAGE\*MERGEFORMATIII220kV电网输电线路继电保护与自动装置的设计摘要电力在现代生产生活中是必不可少的，没有电能社会生活和生产不能正常进行。鉴于电能对社会发展的重要作用，维护电能显得格外重要，继电保护则是电力系统能否正常工作的关键所在。继电保护可以保证电力系统的正常运转，也可以迅速排除故障部分，保证无故障部分迅速恢复工作；不仅确保了社会生活和经济的正常运转，还可以维护人们生命财产的安全。本设计对220kV电网进行了继电保护和自动装置整定计算，包括对电气主接线设计及主要电气设备的选择、系统运行方式的制定和变压器中性接地点的选择系统、最大负荷的潮流分布继电保护装置的整定计算及校验,根据本电网的特点和运行要求，在满足继电保护“四性”要求的前提下，求得最佳方案，分别配置了零序、距离、高频以及横差保护，最后对全套保护进行了评价。关键词：继电保护；220kV；整定计算DesignOfRelayProtectionAndAutomaticDeviceFor220kVTransmissionLineABSTRACTElectricpowerisessentialinmodernproductionandlife.Withoutelectricenergy,sociallifeandproductioncannotbecarriedoutnormally.Inviewoftheimportantroleofelectricenergyinsocialdevelopment,themaintenanceofelectricenergyisparticularlyimportant,andrelayprotectionisthekeytothenormaloperationofthepowersystem.Relayprotectioncanensurethenormaloperationofthepowersystem,canalsoquicklyremovethefaultpart,andensuretherapidrecoveryofthefaultfreepart;notonlyensurethenormaloperationofsociallifeandeconomy,butalsomaintainthesafetyofpeople'slivesandproperties.Inthisdesign,thesettingcalculationofrelayprotectionandautomaticdevicefor220kVpowergridiscarriedout,includingthedesignofmainelectricalconnection,theselectionofmainelectricalequipment,theformulationofsystemoperationmode,theselectionofneutralgroundingpointoftransformer,thesettingcalculationandverificationofthemaximumloadcurrentdistributionrelayprotectiondevice,Accordingtothecharacteristicsandoperationrequirementsofthepowergrid,onthepremiseofmeetingtherequirementsof"fourcharacteristics"ofrelayprotection,thebestschemeisobtained,andzerosequence,distance,highfrequencyandtransversedifferentialprotectionarerespectivelyconfigured.Finally,thefullsetofprotectionisevaluated.PAGE\*MERGEFORMATIII目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc39826687"一、绪论PAGEREF_Toc39826687\h1HYPERLINK\l"_Toc39826688"1.1课题来源及意义PAGEREF_Toc39826688\h1HYPERLINK\l"_Toc39826689"1.2继电保护的现状PAGEREF_Toc39826689\h1HYPERLINK\l"_Toc39826690"1.3本文主要内容PAGEREF_Toc398266