某工厂供电系统设计(毕业论文)

青岛理工大学毕业设计（论文）I摘要本毕业设计为工厂变电所设计，对在工厂变电所设计中的若干问题：负荷计算，三相短路分析，短路电流计算，高低压设备的选择与校验，变压器的继电保护，变电所二次回路及自动装置，防雷与接地，变电所的过电压保护，计量，无功补偿等几方面的设计进行了陈述，并对供电主接线的拓扑结构进行了阐述。该工厂变电所采用10kV单电源进线，采用一台1600kVA的主变压器，最大设备容量1636kW，采用并联电容器进行低压集中补偿，对变压器进行过电流，电流速断，瓦斯保护，按三类防雷建筑物设防，采用强弱电联合接地系统对建筑物进行保护。在对供电系统短路计算的基础上，进行电力电缆和电气设备的选择设计，同时也对户外平面布置进行了初步的设计。关键词：工厂供配电，继电保护，防雷与接地，负荷计算青岛理工大学毕业设计（论文）IIABSTRACTThisgraduationprojectisdesignedforthefactorytransformersubstation,tocertainquestionsinfactorytransformersubstationdesign:theloadcomputation,theanalysisofthree-phaseshort-circuits,theshort-circuitcurrentcomputation,thechoiceandverificationofhighandlowpressureequipment,thetransformerrelayprotection,thesecondarycircuitofthetransformersubstationandtheautomaticdevice,anti-thunderandtheconnectiontotheearth,thetransformersubstationovervoltageprotection,themeasurement,theidleworkcompensatedandsoon,Alltheaboveaspectsandthestructureofthepowersupplyhostwiringtopologyhavebeenstated.Thetransformersubstationwitha10kVsinglepowersourcecoilinituses1600kVAmaintransformer,thebiggestcomputationshouldersofwhichis1636kW.Itadoptstheshuntedcapacitortocarryonthelowpressurecentralismforcompensationandsetsprotectionforthetransformerbycarringontheelectriccurrenttoitbreakingthespeedoftheflowgasprotection,garrisonsaccerdingtothethirdkindofanti-thunderbuildings,andusersthestrongandweakelectricityunionearthsystemtocarryontheprotectiontothebuilding.Basedonthecomputationofshort-circuitstothepowersupplysystem,theprojecthasachoicedesignofthepowercableandtheelectricalequiomentandapreliminarydesigntotheoutdoorsplanearrangementatthesametime.Keywords：thepowerdistribution，supplyinfactory，therelayprotection青岛理工大学毕业设计（论文）III目录摘要.........................................................................................................................................IABSTRACT..................................................................................................................................II第一章绪论.........................................................................................................................11.1课题设计背景..............................................................................................................11.2工厂供电设计的一般原则........................................................................................21.3工厂供电设计内容及步骤........................................................................................2第二章负荷计算和功率补偿....................................................................................52.1负荷计算的内容和目的.............................................................................................52.2负荷计算的方法...........................................................................................................5第三章变压器容量和数量的选择..........................................................................6第四章主接线方案的选择..........................................................................................74.1对变电所主结线的一般要求..........................................................................74.2变电所主结线..................................................................................................74.2.1单电源进线的变电所主接线...............................................................84.2.2双回电源进线变电所主接线...............................................................8第五章短路电流的计算.............................................................................................125.1短路电流计算的目的及方法........................................................................125.2三相短路电流计算........................................................................................12第六章导线、电缆的选择........................................................................................156.1导线电缆的使用条件...................................................................................156.2导线电缆的选择...........................................................................................15第七章电气设备的选择.............................................................................................187.1电气设备选择的一般原则............................................................................187.2.1高压断路器的选择...............................................错误!未定义书签。7.2.3电流互感器的选择.....................................................错误!未定义书签。青岛理工大学毕业设计（论文）IV第八章变压器的继电保护........................................................................................188.1概述..............................................................................................................................188.2变压器电流保护的接线方式.................................................................................208.3继电保护配置............................................................................................................208.3.1变压器的过电流保护..................................................................................208.3.2变压器的电流速断保护..............................................................................21结论.........................................................................................................................