PAGEIV摘要本次设计题目为220kV变电站设计。在符合可靠性、灵活性以及经济性的条件下选择主变压器、主接线方式、短路电流的计算及电气设备的选择，并将以安全性为前提做继电保护规划、配电装置的规划及防雷规划设计，同时还兼顾经济性方面的考虑。此变电所总容量为360MVA。所选变压器为三相三绕组有载调压变压器。变电所具有220kV、110kV及10kV三个电压等级。一次侧电压为220kV，二次侧电压为110kV和10kV两个等级。最大负荷时功率因数不低于0.9。在设计过程中，首先根据负荷预测确定了采用2台SFSZ9-180000/220变压器。220kV侧2回线路，110kV侧6回线路，10kV侧有8回线路。根据设计要求确定220kV及110kV均采用双母线接线的主接线形式，10kV侧采用单母线分段的电气接线方式。在220kV、110kV及10kV侧母线均设置了短路点，采用标幺值法进行了短路电流计算。并对相应侧设置了差动保护和过电流保护。同时对变电所进行了防雷及接地保护设计。关键词变电所电气主接线短路电流计算设备选择校验AbstractThetopicofthisdesignis220kVtransformersubstation.Accordingtothereliability、flexibilityandeconomy,Ichoosethemaintransformer、mainwiringmodeandsomekindsofelectricalequipments;AndIdotherelayprotectionplanning、powerdistributionunitplanningandlightningprotectionplanningatthebasisofsafety.Thistransformersubstationaggregatecapacityis360MVA.Choosesthetransformertohaveforthethree-phasethreevolumescarriestheregulatingtransformer.Thetransformersubstationhas220KV,110KV,andthe10KVthreevoltageranks.Avoltageis220KV,thesecondaryvoltageis110KVandthe10KVtworanks.Maximumloadpowerfactorisnotlessthan0.9.Intheprocessofdesign,firstaccordingtotheloadforecastingwedetermindtouse2transformerofSFSZ9-180000/220.Thereare2lineinthesideof220kV,6lineinthesideof110kVand8lineinthesideof10kV.Accordingtotherequirementsofdesign,weconfirmdoublebusbarcordforminthesideof220kVand110kV.Weusesinglebusbarsectioncardforminthesideof10kV.In220kV,110kVand10kVsideareprovidedwithashortcircuitcurrent.Andthecorrespondingsidesetdifferentialprotection,overcurrentprotectionandmicrocomputerprotection.Atthesametime,weputthelightningprotectionandgroundingprotectionintothisdesign.Keywordssubstationtheelectricitylordconnectslinethecalculationofshort-circuitcurrentselectionandcheckofequipment目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc327099403"摘要PAGEREF_Toc327099403\hIHYPERLINK\l"_Toc327099404"AbstractPAGEREF_Toc327099404\hIIHYPERLINK\l"_Toc327099405"第1章绪论PAGEREF_Toc327099405\h1HYPERLINK\l"_Toc327099406"1.