变电站电气设计

变电站电气设计2————————————————————————————————作者：————————————————————————————————日期：I摘要本次毕业设计的题目是《110/35/10KV变电站电气部分初步设计》。根据设计的要求，在设计的过程中，根据变电站的地理环境、容量和各回路数确定变电站电气主接线和站用电接线，并选择各变压器的型号；进行参数计算、画等值网络图，并计算各电压等级侧的短路电流，列出短路电流结果表；计算回路持续工作电流、选择各种高压电气设备，并根据相关技术条件和短路电流计算结果表校验各高压设备。随着科学技术的发展，网络技术的普及，数字化技术成为当今科学技术发展的前沿，变电站数字化对进一步提升变电站综合自动化水平将起到极大促进作用，是未来变电站建设的发展方向。基于这种发展的需求，该变电站采用EDCS-6200型110kV变电站综合自动化。利用数字化技术来解决目前综合自动化变电站存在的问题已成为可能。本变电站就是利用数字化技术使变电站的信息采集、传输、处理、输出过程全部数字化，并使通信网络化、模型和通信协议统一化、设备智能化、运行管理自动化。通过本次设计，学习了设计的基本方法，巩固三年以来学过的知识，培养独立分析问题的能力，而且加深对变电站的全面了解。关键词主接线，短路电流，电气设备，主变保护，配电装置，EDCS-6200IAbstractThisgraduationprojecttopicis:110/35/10KVTransformersubstationElectricityPartPreliminarydesign.Accordingtothedesignrequest,inthedesignprocess,accordingtothetransformersubstationgeographicalenvironment,thecapacityandvariousreturnroutesnumberdeterminedthetransformersubstationelectricityhostwiringandthestationuseelectricitythewiring,andchoosesvarioustransformersthemodel;Carriesontheparametercomputation,thepictureequivalentnetworkchart,andcalculatesvariousvoltagesranksidetheshort-circuitcurrent,liststheshort-circuitcurrentresulttable;Calculatesthereturnroutecontinuallyoperatingcurrent,chooseseachkindofhighpressureelectricalequipment,andverifiesvarioushighpressureunitaccordingtothecorrelationengineeringfactorandtheshort-circuitcurrentcomputedresulttable.Alongwiththescienceandtechnologydevelopment,thenetworkingpopularization,thedigitizedtechnologywillbecomenowthescienceandtechnologydevelopmentthefront,thetransformersubstationdigitizationtofurtherpromotesthetransformersubstationsynthesisautomationleveltogetuptothelimitthebigpromoteraction,isthefuturetransformersubstationconstructiondevelopmentdirection.Basedonthiskindofdevelopmentdemand,thistransformersubstationusesEDCS-6200the110kVtransformersubstationsynthesisautomation.Solvesatpresentusingthedigitizedtechnologytosynthesizetheautomatedtransformersubstationexistencethequestionpossiblytobecome.Thistransformersubstationiscausesthetransformersubstationusingthedigitizedtechnologyinformationgathering,thetransmission,processing,theoutputprocesstodigitizecompletely,andcausesthecorrespondencenetwork,themodelandcommunicationprotocolunitizing,theequipmentintellectualization,themovementmanagementautomation.Throughthisdesign,hasstudiedthedesignessentialmethod,sincetheconsolidatedfouryearshavestudiedtheknowledge,raisestheindependentanalysisquestionability,moreoverdeepenstothetransformersubstationcomprehensiveunderstanding.KeywordsMainwiring,Short-circuitcurrent,Electricalequipment,Thehostchangestheprotection,Powerdistributionequipment,EDCS-6200目录II绪论................................................................1第1章变电站电气主接线设计及主变压器的选择.........................11.1主接线的设计原则和要求.........................................11.1.1主接线的设计原则..........................................11.1.2主接线设计的基本要求......................................11.2主接线的设计...................................................21.2.1设计步骤..................................................21.2.2初步方案设计..............................................21.2.3最优方案确定..............................................31.3主变压器的选择.................................................41.3.1主变压器台数的选择........................................41.3.2主变压器型式的选择........................................41.3.3主变压器容量的选择........................................51.3.4主变压器型号的选择........................................51.4站用变压器的选择................................................51.4.1站用变压器的选择的基本原则................................51.4.3站用变压器型号的选择......................................6第2章短路电流计算.................................................72.1短路计算的目的、规定与步骤.....................................72.1.1短路电流计算的目的........................................72.1.2短路计算的一般规定........................................72.1.3计算步骤..................................................72.2变压器的参数计算及短路点的确定.................................82.2.1变压器参数的计算..........................................82.2.2短路点的确定..............................................82.3各短路点的短路计算.............................................92.3.1短路点d-1的短路计算(110KV母线)...........................92.3.2短路点d-2的短路计算(35KV母线)............................92.3.3短路点d-3的短路计算(10KV母线)...........................102.3.4短路点d-4的短路计算.....................................102.4绘制短路电流计算结果表........................................11第3章电气设备选择与校验..........................................123.1电气设备选择的一般规定........................................123.1.1一般原则.................................................123.1.2有关的几项规定...........................................123.2各回路持续工作电流的计算......................................123.3高压电气设备选择..............................................133.3.1断路器的选择与校验.......................................133.3.2隔离开关的选择及校验.....................................163.3.3电流互感器的选择及校验...................................173.3.4电压互感器的选择及校验...................................203.3.5母线与电缆的选择及校验...................................213.3.6熔断器的选择.................................