220kV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IDesign Of Relay Protection And AutomaticDevice For 220kV Transmission LineABSTRACTElectric power is essential in modern production and life.Without electric energy,social life and production can not be carried out normally.In view of the importantrole of electric energy in social development,the maintenance of electric energy isparticularly important,and relay protection is the key to the normal operation of thepower system.Relay protection can ensure the normal operation of the power system,can also quickly remove the fault part,and ensure the rapid recovery of the fault freepart;not only ensure the normal operation of social life and economy,but alsomaintain the safety of people's lives and properties.In this design,the setting calculation of relay protection and automatic devicefor 220kV power grid is carried out,including the design of main electricalconnection,the selection of main electrical equipment,the formulation of systemoperation mode,the selection of neutral grounding point of transformer,the settingcalculation and verification of the maximum load current distribution relay protectiondevice,According to the characteristics and operation requirements of the power grid,on the premise of meeting the requirements of "four characteristics"of relayprotection,the best scheme is obtained,and zero sequence,distance,high frequencyand transverse differential protection are respectively configured.Finally,the full setof protection is evaluated.目录1.1课题来源及意义1.2继电保护的现状1.3本文主要内容二、输电线路继电保护原理32.1基本要求…32.2基本工作原理…52.3220kV线路保护.2.4输电线路继电保护配置原理52.5输电线路参数的计算…三、短路电流计算及其电气设备选择103.1短路电流计算…3.1.1画等值网络图….103.1.2短路点的选择…123.1.3短路电流计算结果…3.2设备选择及其校验3.2.1断路器的选择计算3.2.2隔离开关的选择计算.163.2.3电流互感器的选择计算…四、输电线路继电保护整定计算4.1220kV输电线路相间保护整定计算4.1.1距离保护的基本概念.194.1.2距离保护的整定…19