某厂车间变电所及低压配电系统设计

西南科技大学城市学院本科生毕业论文I某厂车间变电所及低压配电系统设计摘要：本次设计是针对车间变电所和车间低压配电系统的设计，所以设计中采用10KV电源进线，然后经过车间变电所降为一般低压用电设备所需的电压220/380V；设计过程中先计算车间的总负荷和无功功率补偿，确定变压器容量及型号，再考虑的建设方案，变电所主接线方案的选择，高压一次设备的选择，低压一次设备的先择，进出线的先择，短路计算及开关设备的选择，二次回路方案的确定及继电保护的选择与整定，防雷保护及接零的设计，变电所电气照明的设计等关键词：变电所；低压配电系统；负荷计算；短路计算；电气设备选择；主接线；防雷保护；电气照明等西南科技大学城市学院本科生毕业论文IIAbstract：Theworkshopisdesignedforlow-voltagesubstationanddistributionsystemdesignworkshops,design10KVpowerlineused,andthenreducedtolowpressurethroughtheplantsubstationvoltageelectricalequipmentrequired220/380V;designprocessthefirstworkshopinthecalculationoftotalloadandreactivepowercompensation,determinethetransformercapacityandmodel,considertheconstructionplan,selectionofsubstationmainwiringscheme,ahigh-voltageequipmentselection,equipment,firstchoosealow-voltage,inletandoutletofthefirstchoice,shortcircuitcalculationsandswitchingequipmentselection,determinationandthesecondarycircuitprogramselectionandsettingofrelayprotection,lightningprotectionandaccesstozerodesign,lightingdesign,electricalsubstationKeywords:substation,lowvoltagedistributionsystems,loadcalculations,shortcircuitcalculations,electricalequipmentselection,themainwiring,lightningprotection,electricallighting,etc.西南科技大学城市学院本科生毕业论文III目录第一章绪论.........................................................................................................................11.1变电所的发展概况及其前景展望..........................................................................11.2设计内容及依据......................................................................................................11.2.1设计内容........................................................................................................11.2.2设计依据........................................................................................................2第二章变电所的设计.........................................................................................................62.1变电所的负荷计算..................................................................................................62.1.1变电所的负荷分级........................................................................................62.1.2负荷计算的目的............................................................................................62.1.3负荷计算方法的选择....................................................................................72.1.4变电所各车间的负荷计算............................................................................82.2变电所的无功功率补偿计算................................................................................162.2.1无功功率补偿的目的..................................................................................162.2.2无功功率补偿的计算..................................................................................162.2.3无功补偿方案的选择..................................................................................172.3车间变电所位置和型式的选择............................................................................182.3.1变配电所所址的选择原则..........................................................................182.3.2变电所型式的选择......................................................................................182.4供电电压选择,变电所主变压器容量和台数的确定...........................................192.4.1供电电压的选择..........................................................................................192.4.2变电器台数和容量的选择..........................................................................202.5变压器联结组标号的选择....................................................................................212.6变电所主接线方案的设计....................................................................................222.6.1只装有一台主变压器的小型变电所常见主接线图..................................222.6.2主接线图的选择..........................................................................................232.7短路电流的计算....................................................................................................232.7.1短路计算的目的..........................................................................................232.7.2短路电流计算..............................................................................................24西南科技大学城市学院本科生毕业论文IV2.8变电所一次设备的选择与校验............................................................................272.8.1电气设备的选择原则..................................................................................272.8.2变电所一次设备的选择校验......................................................................272.8.3变压所高低压进出线的选择......................................................................312.8.4导线和电缆的选择校验..............................................................................342.9变电所二次回路的设计及保护............................................................................362.9.1变电所高低压侧常见二次回路及设备......................................................362.9.2变电所二次回路的保护和整定校验计算..................................................382.10变电所的防雷接地保护......................................................................................412.10.1防雷保护设计............................................................................................412.10.2公共接地装置设计...........