220KV变电站电气设计

青岛科技大学本科毕业设计（论文）1220KV变电站电气设计摘要在电力系统中变电站是非常重要的一部分，它承担着电压变送和接受的任，同时也起到分配电能和控制电能流向的重要作用。而随着我们国家经济的快速发展，电能的稳定、安全供应越来越重要，所以变电站的安全稳定运行也是至关重要的。本文以220KV变电站入手，结合技术经济指标和我国经济未来的发展，综合分析变电站各个部分设计方案，对变电站电气主接线进行最优设计的选择，为变电站选择变压器和其他电力设备，也在继电保护，防雷避雷，电气设备的选择及保护、短路电流水平等方面也进行了阐述，并提出了相关的优化措施。本设计的变电站将提高供电可靠性、增加规划的灵活性等特点。力求能设计出一个安全稳定经济效益好的220KV变电站。关键词：220KV变电站；电气设计；电压；电流；防雷避雷220KV变电站电气设计2THEELECTRICALDESIGNOF220KVSUBSTATIONABSTRACTSubstationinthepowersystemisaveryimportantpartofitbearsanyvoltagetransmissionandacceptance,butalsoplayanimportantroleinthedistributionofpowerandcontrolelectricpowerflows.Withtherapiddevelopmentofournationaleconomy,stable,securesupplyofenergyisbecomingincreasinglyimportant,itissafeandstableoperationofthesubstationisalsoessential.Inthispaper,220KVsubstation,combiningthefuturedevelopmentoftechnicalandeconomicindicatorsofoureconomy,acomprehensiveanalysisofthevariouspartsofthedesignsubstationtothemainsubstationelectricalwiringoptimaldesignchoices,selecttransformersandotherelectricalequipmentforthesubstation,butalsorelayprotection,lightninglightning,selectionandprotection,shortcircuitcurrentlevelofelectricalequipment,etc.havealsobeenelaboratedandputforwardrelevantoptimizationmeasures.Thedesignofthesubstationwillimprovereliability,increasetheflexibilityofplanningandsoon.Strivetodesignasafeandstablegoodeconomic220KVsubstation.KEYWORDS:220KVsubstation;electricaldesign;voltage;current;minelightning青岛科技大学本科毕业设计（论文）3目录前言...........................................................................................................................11.变电站工程概况....................................................................................................21.1变电站原始资料...........................................................................................22.电气主接线的设计................................................................................................32.1电气主接线的概述.......................................................................................32.2电气主接线的设计原则...............................................................................32.3220KV变电站电气主接线的选择..............................................................33.主变压器的选择....................................................................................................63.1变压器的概述...............................................................................................63.2主变压器台数的选择...................................................................................63.3主变压器容量的选择...................................................................................63.4主变压器绕组相数的选择...........................................................................63.5主变压器绕组绕组数量和连接形式...........................................................73.6主变压器调压方式的选择...........................................................................73.7主变压器冷却方式的选择...........................................................................73.8主变压器最终选择.......................................................................................84.电气部分短路计算................................................................................................94.1电力系统短路故障的概述...........................................................................94.2短路计算.....................................................................................................154.2.1变压器的各绕组电抗标幺值计算........................................................................154.2.2220KV侧短路计算...............................................................................................164.2.3110KV侧短路计算...............................................................................................16220KV变电站电气设计44.2.435KV侧短路计算.................................................................................................175.电气设备的选择和校验......................................................................................195.1概述.............................................................................................................195.2母线选择.....................................................................................................205.2.1220KV侧母线选择...............................................................................................215.2.2110KV侧母线选择.............................................................................................2275.2.335KV侧母线选择.................................................................................................185.3高压断路器的选择.....................................................................................195.3.1概述........................................................................................................................195.3.2220KV侧高压断路器的选择.............................................................................2505.3.3110KV侧高压断路器的选择...............................................................................265.3.435KV侧高压断路器的选择.................................................................................275.4高压隔离开关的选择.........................................