电力变电所主变保护设计

西安石油大学本科毕业设计(论文)I电力变电所主变保护设计摘要：变电所是电力系统的一个重要组成部分，特别是超高压枢纽变电站的地位更为突出，它起着汇集和分配电的等重要作用，是全系统安全、可靠、经济运行的重要一环。如果变电站的设备出现故障将危及整个系统连续稳定运行，可能出现系统解列，致使用户断电，造成巨大的经济损失。因此要给变电站的设备装设动作可靠、迅速、性能完善的保护，把故障影响限制在最小范围内。本次设计的电力变电所有3个电压等级，110KV/35KV/10KV。高压侧采用双母带旁母的接线方式，中压侧采用单母线分段的接线方式，低压侧为单母线分段，无负荷，接有无功补偿装置。主变为SFSZ10型三绕组变压器（两台）。本次设计中主要对主变压器进行了保护配置和整定计算，其次对各侧线路进行了保护配置和整定计算。以上设计都是参考《电力工程设计手册》、《电力系统继电保护原理》、《电力系统继电保护与安全自动装置整定计算》、《电力工程电气设计手册》等资料来进行配置和整定计算的。关键词：变电站保护配置整定计算西安石油大学本科毕业设计(论文)IIElectricitytransformersubstationdesignedtoprotectAbstract：Substationpowersystemisanimportantpart,especiallyEHVsubstationshubstatusmoreprominent,anditplaysapowerpoolandtheallocationofanimportantroleinthewholesystemissafe,reliableandeconomicoperationofanimportantpart.Ifthesubstationequipmentfailurewouldjeopardizetheentiresystemforstableoperationofthesystemmayariseout,causingtheuseroff,causinghugeeconomiclosses.SogivethesubstationequipmentinstalledActionreliable,rapidandsoundperformanceoftheprotection,tolimittheimpactoffailurewithintheframeworkofthesmallest.Thedesignofthe110KVsubstationsarethreevoltagelevels,110KV/35KV/10KV.High-pressuresideofadualmaster'scablenexttothebusbar,asingle-sidepressureinthesub-busconnectionmode,low-pressuresideofasinglesub-bus,noload,andthentherereactivecompensationdevices.SFSZ10intothemainthree-windingtransformer（two）.Thedesignofthemaintransformerofmainprotectionfortheconfigurationandsettingcalculation,followedbythesideofthelinefortheprotectionofconfigurationandsettingcalculation.AbovereferencedesignarePowerEngineeringDesignManual,powersystemprotectionprinciple,powersystemprotectionandsecurityautomaticdevicesettingcalculation,ElectricPowerEngineeringDesignManualanduseotherinformationusedtoconfigurationandsettingcalculation.Keywords:Substationconfigurationsettingcalculation.西安石油大学本科毕业设计(论文)I目录1绪论.....................................................................................................................................I1.1背景...........................................................................................................................11.2国内外现状...............................................................................................................11.3毕业设计（论文）的主要内容...............................................................................12长庆水电厂马岭变电所.................................................................................................32.1背景资料...................................................................................................................32.2主接线形式...............................................................................................................32.3设计任务要求...........................................................................................................32.4原始资料...................................................................................................................32.5电力变电所主接线见图2-2.....................................................................................53短路计算.........................................................................................................................73.1主变的路计算...........................................................................................................73.2线路的短路计算.......................................................................................................84变电站保护配置原则及说明.........................................................................................94.1差动保护...................................................................................................................94.1.1差动保护原理....................................................................................................94.1.2差动保护计算式................................................................................................94.2变压器瓦斯保护.....................................................................................................114.3后备保护.................................................................................................................124.3.1零序过电流保护..............................................................................................124.3.2电压启动的过电流保护原理..........................................................................124.3.3零序保护原理图（见图4-6）........................................................................135线路各种保护的原理及应用.......................................................................................155.1相间距离保护.........................................................................................................155.2相间接地保护.........................................................................................................155.3三段式电流保护.....................................................................................................155.4高频闭锁保护.........................................................................................................155.5零序电流保护.........................................................................................................165.611