南京师范大学电气与自动化工程学院本科毕业设计论文PAGEII某企业35kV变电所电气设计(一次部分)摘要本篇毕业设计的课题是“某企业35kV变电所电气设计”，主要是关于强电部分的设计。本设计分别从主接线、短路电流计算、主要电气设备选择等几个方面对变电站进行了阐述，并绘制出电气主接线图、电气总平面布置图、防雷与接地图等相关图纸。由于存在两条独立电源进线，本次设计采用两台主变压器，并根据给定的计算负荷，选定额定容量为8000kVA变压器SZ11-8000/35。通过比较各种主接线方案的优缺点，最终确定35kV电压等级侧采用线变组接线方式；6kV电压等级侧采用单母分段式接线方式。在绘制出电气主接线简图的基础上，分别选择主变压器高低侧短路时作为短路点，计算出短路电流，从而作为选择及校验主要电气设备的依据。主要电气设备包括断路器、隔离开关、熔断器、电流互感器、电压互感器、母线、避雷器。按正常工作条件下选择设备的额定电流、额定电压及型号，按短路情况下校验设备的热稳定、动稳定以及开关的开断能力。在主要电气设备都选定的基础上，可以绘制出最终的电气主接线图、平面布置图、防雷与接地图。关键词：主变压器，主接线方式，短路电流，电气设备AbstractThisgraduationthesisisabout“Electricdesignforanenterprise”.Itismainlyaboutthedesignofheavycurrentsystem.Thisdesignseparatelyfromthemainconnection,short-circuitcurrentcalculation,themainelectricalequipmentselectionandsoonseveralaspectsofsubstationwereintroduced,andmapoutthemainelectricalwiring,electricalgenerallayout,lightningprotectionandpickupthemapandrelateddrawings.Becausetherearetwoseparatepowerlines,thedesignusestwomaintransformers,andaccordingtothegivenload,ratedcapacityofupto8000kVAtransformersSZ11-8000/35isselected.Bycomparingthevariousadvantagesanddisadvantagesofmainwiringscheme,finalize35kVvoltagelinetransformerconnection6kVvoltagesingle-segmentconnection.Drawonthebasisofmainelectricalwiringdiagram,asashortcircuitwhenyouchoosehighandlow-sideshortcircuitofmaintransformer,calculationofshortcircuitcurrent,soasthebasisforselectionandcheckthemainelectricalequipment.Mainelectricalequipmentincludingcircuitbreakers,disconnections,fuse,currenttransformers,voltagetransformers,bus,lightningarrester.Undernormaloperatingconditionstheratedcurrent,ratedvoltageandmodelofthedevice,byshortcircuitcasecalibrationdeviceofthermalstability,stabilityandthebreakingcapacityoftheswitch.Majorelectricalequipmentwereselectedonthebasisof,youcandrawoutthefinalelectricalwiringdiagram,floorplan,lightningprotectionandgrounding.KeyWords:TheMainTransformer,theElectricityLordConnectstheLine,theShort-circuitCurrent,theElectricalEquipment目录TOC\o"1-3"\h\z\uHYP