110KV变电站设计

I110KV变电站设计学院：专业：年级:指导老师：学生姓名：日期：II摘要：本文主要进行110KV变电站设计。首先根据任务书上所给系统及线路和所有负荷的参数，通过对所建变电站及出线的考虑和对负荷资料分析，满足安全性、经济性及可靠性的要求确定了110KV、35KV、10KV侧主接线的形式，然后又通过负荷计算及供电范围确定了主变压器台数、容量、及型号，从而得出各元件的参数，进行等值网络化简，然后选择短路点进行短路计算，根据短路电流计算结果及最大持续工作电流，选择并校验电气设备，包括母线、断路器、隔离开关、电压互感器、电流互感器等，并确定配电装置。根据负荷及短路计算为线路、变压器、母线配置继电保护并进行整定计算。本文同时对防雷接地及补偿装置进行了简单的分析，最后进行了电气主接线图及110KV配电装置间隔断面图的绘制。关键词：变电站设计，变压器，电气主接线，设备选择IIIAbstract:Thispapermainlycarriesonthedesignof110KVsubstation.Accordingtothemandategivenbythesystemandtheloadlineandallparametersofthesubstationandlineconsiderationandthedataofloadanalysis,meetthesafety,economyandreliabilityrequirementsof110KV,35KV,10KVsideofthemainconnectionformisdetermined,andthenthroughtheloadcalculationanddeterminethescopeofsupplythenumber,size,andtypeofthemaintransformer,thusobtainstheparametersofeachelement,theequivalentnetworksimplification,andthenselecttheshortcircuitshortcircuitcalculation,thecalculationresultsandthemaximumcontinuousworkingcurrentaccordingtoshort-circuitcurrent,selectionandcalibrationofelectricalequipment,includingbus,circuitbreaker,isolatingswitch,voltagetransformer,currenttransformeretc.,anddeterminethedistributiondevice.Accordingtotheloadandshortcircuitcalculationfortheline,transformer,busconfigurationofrelayprotectionandsettingcalculation.Atthesametime,thispapermakesasimpleanalysisoflightningprotectionandgroundingandcompensationdevice,andfinallycarriesouttheelectricalmainwiringdiagramandthe110KVdistributionunitintervalsectiondrawing.Keywords:substationdesign,transformer,electricalmainwiring,equipmentselectionIV目录1引言.............................................................................................................................................11.1变电站的作用....................................................................................................................11.2我国变电站及其设计的发展趋势....................................................................................21.3变电站设计的主要原则和分类........................................................................................51.4选题目的及意义................................................................................................................61.5设计思路及工作方法........................................................................................................61.6设计任务完成的阶段内容及时间安排............................................................................72任务书.........................................................................................................................................72.1原始资料............................................................................................................................72.2设计内容及要求..............................................................................................................103电气主接线设计.......................................................................................................................113.1电气主接线设计概述......................................................................................................113.2电气主接线的基本形式..................................................................................................143.3电气主接线选择..............................................................................................................144变电站主变压器选择...............................................................................................................184.1主变压器的选择..............................................................................................................194.2主变压器选择结果..........................................................................................................215短路电流计算...........................................................................................................................225.1短路的危害......................................................................................................................225.2短路电流计算的目的......................................................................................................225.3短路电流计算方法..........................................................................................................225.4短路电流计算..................................................................................................................235.4.1110kv侧母线短路计算......................................................................................255.4.235kv侧母线短路计算........................................................................................275.4.310kv侧母线短路计算........................................................................................286电气设备的选择.......................................................................................................................316.1导体的选择和校验..........................................................................................................316.1.1110kv母线选择及校验......................................................................................326.1.235kv母线选择及校验..............................................................................