110kV变电站毕业设计

I摘要根据设计任务书的要求，本次设计为110kV变电所电气一次部分初步设计，并绘制电气主接线图及其他图纸。该变电站设有两台主变压器，站内主接线分为110kV、35kV、和10kV三个电压等级，各个电压等级分别采用桥形接线、单母线分段带旁母接线和单母线分段接线，设计包括电气的一次部分和二次部分的设计和计算。在一次部分中，要对电力系统和变电站进行总体分析，然后确定变电站电气主接线的形式，并在此过程中进行系统的无功补偿、短路电流计算以及电气设备的选择。在具体计算后，还要为建造变电站进行配电装置及电气总平面的布置设计，使建站合理化。在二次部分中，要综合考虑保护的方式、系统运行的方式和短路点的选择，在此基础上进行整定计算。在设计过程中要绘制相关图纸，包括主接线等较重要图纸并掌握其内容。本次设计中进行了电气主接线的设计、短路电流计算、主要电气设备选择及校验（包括断路器、隔离开关、电流互感器、电压互感器、母线等）、各电压等级配电装置设计、直流系统设计以及防雷保护的配置。关键字变电所短路电流计算变压器电气设备IIAbstractRequestaccordingtodesignspecification,capitaltheconnectiondiagramdesigningthatthefirststepdesigns,anddrawtheelectricityhostfor110kVsubstationelectricityoncepartstimeandtheirhisdrawingsheet.Thattransformersubstationissetuphavingtwohosttransformers,thestationinnerhostworksatelephoneswitchboarddividing110kV,35kV，10kVthreevoltagegrades,onebyone,thevoltagegradeadoptthebridgeshapetoworkatelephoneswitchboardrespectively,ShanbusbarparagraphdivisiontakesothermotherconnectionandShanbusbarparagraphdivisiontoworkatelephoneswitchboard,designsthedesignincludingelectricpartandrepeatedpartandsecretlyschemesagainst.Inapart,wanttheanalysiscarryingoutpopulationonelectricsystemandthetransformersubstation,choiceascertainingtransformersubstationelectricityhostconnectionformthen,andcarryingoutsystematicidleworkcompensation,secretlyschemeagainstandelectricequipmentofshort-circuitcurrenthereinprocess.Arrangementwantingtobetobuildatransformersubstationtocarryoutthepowerdistributiondeviceandthegeneralflatsurfaceofelectricitytoointhequeenwhosecretlyschemesagainstconcretely,designs,makesrationalizationbuildastation.Inrepeatedpart,wantthechoiceconsideringthewayandshortcircuitpointthatway,systemprotectingrunsynthetically,theadjustingbeinginprogresshereonthebasissecretlyschemesagainst.Needtodrawtherelevancedrawingsheetintheprocessofdesign,includemoreimportantdrawingsheetsuchashostconnectionandgraspwhosecontent.Thistimedesignmiddlebeinprogresselectricityhostworkatelephoneswitchboarddesign,short-circuitcurrentsecretlyschemeagainst,mainelectricaccessorychooseandchecking(includingbreaker,disconnector,electriccurrentmutualinductanceimplement,voltagemutualinductanceimplement,busbarandsoon),everyvoltagegradepowerdistributiondevicedesign,direct-currentsystemdesignandlightningprotectionprotectionallocation.KeywordsSubstationShort-circuitcurrentsecretlyschemesagainstTransformerElectricaccessoryIII目录摘要...............................................................IAbstract..........................................................II第一章绪论.......................................................11.1电力系统概述...............................................................................................11.1.1电力工业概况....................................................................................11.1.2我国电力工业和电力系统简介.........................................................21.1.3电力系统的基本特点.........................................................................21.1.4电力系统的接线方式.........................................................................31.2本变电所各级电压负荷情况分析................................................................41.3变电所的自然条件.......................................................................................4第二章电气主接线..................................................52.1电气主接线设计的基本要求.......................................................................52.2主变压器台数、容量、型式的选择...........................................................62.3电气主接线方案设计...................................................................................72.4变电所电气主接线特点...............................................................................9第三章所用变与直流系统...........................................113.1所用电接线.................................................................................................113.2所用变压器台数、容量选择......................................................................113.3直流系统.....................................................................................................12第四章短路电流计算...............................................134.1短路电流计算的目的..................................................................................134.2短路电流计算条件.....................................................................................134.3短路电流计算方法与步骤.........................................................................154.4变电所三相短路电流计算.........................................................................16第五章电气设备选择...............................................185.1电气设备选择一般条件.............................................................................185.210kV配电装置电气设备选择....................................................................205.335kV配电装置电气设备选择....................................................................27IV5.4110kV配电装置电气设备选择..................................................................34第六章电气布置...................................................426.1配电装置布置要求...................................................................................426.1.1配电装置总要求...................................