某工厂10kv车间变电所电气部分设计

洛阳理工学院毕业设计(论文)I某工厂10kV车间变电所电气部分设计摘要本设计的题目为“某工厂10kV车间变电所电气部分设计”。设计的主要内容包括：10/0.4kV变电所主变压器选择；变电所电气主接线设计；短路电流计算；负荷计算；无功功率补偿；电气设备选择（母线、高压断路器、隔离开关、电流互感器、电压互感器、避雷器和补偿电容器）；配电装置设计；继电保护规划设计；防雷保护设计等。其中还对变电所的主接线通过CAD制图直观的展现出来。本次设计的内容紧密结合实际，通过查找大量相关资料，设计出符合当前要求的变电所。本变电所对低压侧负荷的统计计算采用需要系数法；为减少无功损耗，提高电能的利用率，本设计进行了无功功率补偿设计，使功率因数从0.74提高到0.96；短路电流的计算包括短路点的选择及其具体数值计算；而电气设备选择采用了按额定电流选择，按短路电流计算的结果进行校验的方法；继电保护设计主要是对变压器进行电流速断保护和过电流保护的设计计算；配电装置采用成套配电装置；本变电所采用避雷针防直击雷保护。关键词：短路电流计算，继电保护，接地装置，变压器洛阳理工学院毕业设计(论文)IITheelectricaldesignof10kVsubstationofafactoryworkshopABSTRACTThedesignisonthetopicof“theelectricaldesignof10kVsubstationofafactoryworkshop”.Themaindesignelementsinclude:10/0.4kVmaintransformersubstationchoice;electricalsubstationmainwiringdesign;short-circuitcurrentcalculation;loadcalculation;reactivepowercompensation;electricalequipment(bus,HVcircuitbreakers,isolationswitches,currenttransformerandvoltagetransformer,andcompensationcapacitor);distributionequipmentdesign;relayplanninganddesign;lightningprotectiondesign.ItalsoshowsmainwiringofsubstationbythegraphicsofCAD.Thisdesigniscloselyrelatedtorealityinordertodesignthesuitablesubstationbystudyingalotofmaterials.Inthedesign,thelow-pressuresideloadcalculationsusetheneedscoefficient;toreducethereactivepowerloss,andincreasedenergyutilization,thedesignusereactivepowercompensationdesign,powerfactorisraisedfrom0.74to0.96;short-circuitcurrentcalculationsincludeshort-circuitpointfortheselectionandspecificnumericalcalculation;andelectricalequipmentsarechosenbythechoiceofratedcurrentandshort-circuitcurrentcalculationbytheresultsofthecalibrationmethods;themainproblemsofrelaydesignisthecalculationoftransformercurrentprotectiondesignandover-currentprotectiondesign;distributioninstallationscompleteuseasetofpowerdistributionequipment;thesubstationusingdirectlightningstrokepreventionlightningprotection.KEYWORDS:thecalculationsofshortcurrent,theprotectionofrelay,theearthdevice,transform洛阳理工学院毕业设计(论文)III目录前言................................................................................................1第1章任务说明...............................................................................31.1设计要求...............................................................................31.2负荷情况...............................................................................31.3供电电源情况.......................................................................41.4气象、地质水文资料...........................................................4第2章机加工车间的负荷计算.......................................................52.1负荷计算...............................................................................52.2无功功率补偿.......................................................................7第3章工厂变电所的设备选择及主接线设计................................93.1总降压变电所位置的选择...................................................93.2变压器台数及容量的选择...................................................93.3变电所主结线的选择.........................................................103.3.1变电所主接线的选择原则........................................103.3.2变电所主接线方案的选择........................................11第4章工厂供、配电系统短路电流计算......................................134.1短路电流计算的目的及方法..............................................134.2短路电流计算.....................................................................134.2.1绘制计算电路图.......................................................134.2.2确定基准值...............................................................144.2.3计算短路电路中各主要元件的电抗标幺值.............144.2.4k-1故障点的短路电流计算......................................154.2.5k-2故障点的短路电流计算......................................16第5章变电所一次设备的选择校验..............................................175.1变电所高压一次设备的介绍..............................................175.2一次设备的选择与校验的条件和项目..............................175.3变电所10kV侧一次设备的选择.......................................195.4变电所380V低压一次设备的选择...................................21洛阳理工学院毕业设计(论文)IV5.5高压母线的选择.................................................................23第6章变电所进出线与邻近单位联络线的选择..........................246.1导线和电缆截面选择时满足的条件..................................246.210kV高压进线的选择校验.................................................246.2.110kV高压进线与邻近单位联络线的选择................256.2.2由高压配电室至主变的一段引入电缆的选择.........256.3380V低压出线的选择........................................................256.4作为备用电源的高压联络线的选择校验..........................28第7章变电所二次回路方案的选择..............................................307.1高压断路器的操动机构控制与信号回路..........................307.2变电所的电能计量回路.....................................................307.3变电所的测量和绝缘监察回路..........................................317.3.1变电所高压侧测量和绝缘监察回路........................317.3.2变电所低压侧测量和绝缘监察回路........................327.4变电所的保护设备.............................................................327.4.1对继电保护装置的基本要求....................................327.4.2主变压器的继电保护装置........................................337.4.3作为备用电源的高压联络线的极点保护装置.........347.4.3变电所低压侧的保护装置........................................35第8章变电所的防雷保护与接地装置的设计..............................368.1变电所的防雷保护.....