600MW火电厂电气主接线方案与设备布置设计

600MW火电厂电气主接线方案与设备布置设计600MW火电厂电气主接线方案与设备布置设计摘要本设计是对600MW火电厂新建工程主接线方案与设备布置进行设计，主要运用发电厂电气部分、高电压技术、电力系统分析、电力系统自动化等专业知识完成“发电厂主接线的设计”。具体设计内容包括主接线的接线方案设计、负荷分析计算、变压器选择、配电装置设计、绘制电气主接线图、绘制厂用电接线原理图。本设计严格遵循发电厂电气部分的设计原则，并结合实际情况将主接线的接线方案确定为双母线接线方式，发电机变压器组确定为单元接线。同时，利用换算系数法进行负荷分析计算，高压厂用变压器选择低压分裂绕组变压器，确定了合适的短路点并进行短路电流计算。然后对电气设备的动、热稳定校验，对主要电气设备型号、参数进行确定，设计并绘制了220kV配电装置平面布置图及220kV配电装置断面图。关键词：火电厂；电气主接线；电气设备；配电装置600MW火电厂电气主接线方案与设备布置设计THEMAINELECTRICALWIRINGPROGRAMSANDEQUIPMENTLAYOUTDESIGNOF600MWTHERMALPOWERPLANTABSTRACTThetextisaboutmainwiringprogramsandequipmentlayoutdesignofanewconstructionof600MWthermalpowerplant.UseofPowerPlantElectricalParts,HighVoltageTechnology,PowerSystemAnalysis,PowerSystemAutomationExpertisetocompletethedesignofthemainwiringofpowerplants.Thespecificdesignelementsincludethemainwiringconnectiondesign,loadanalysisandcalculation,transformerselection,designofpowerdistributionequipment,drawelectricalwiringdiagram,drawingauxiliarypowerwiringschematic.Thedesignstrictlyfollowthedesignprinciplesofpowerplantelectricalpart,combinedwiththeactualsituationofthemainwiringconnectionprogramanddeterminedtheprogramforthedual-buswiring,generator-transformersetidentifiedasunitconnection.Atthesametime,usetheconversionfactormethodforloadcalculation,thehigh-voltagestationtransformerselectlow-voltagesplit-windingtransformer,anddeterminetheappropriateshort-circuitpointandshortcircuitcurrentcalculation.Thendeterminedthedynamicandthermalcalibrationofelectricalequipment,determinedtheelectricalequipmentmodels,parameters.Designedanddrewafloorplanof220kVpowerdistributionunitandthesectionaldrawingpowerof220kVdistributionunit.KeyWords:thermalpowerplant;mainelectricalwiring;electricalequipment;powerdistributionequipment600MW火电厂电气主接线方案与设备布置设计目录第一篇设计说明书..................................................................................................................11电气一次接线设计.......................................................................................................11.1发电机电压级接线.............................................................................................11.2220kV电气主接线.............................................................................................21.36kV厂用电接线.................................................................................................42负荷计算及变压器选择...............................................................................................52.1厂用负荷计算.....................................................................................................52.2主变台数、容量和型式的确定.........................................................................82.3厂用变压器台数、容量和型式的确定...........................................................113最大持续工作电流及短路计算.................................................................................143.1各回路最大持续工作电流...............................................................................143.2220kV各回路最大持续工作电流计算...........................................................143.3短路电流计算点的确定、基本假设、目的和短路电流计算结果...............154主要电气设备选择.....................................................................................................164.1高压断路器的选择说明...................................................................................164.2隔离开关的选择说明.......................................................................................184.3母线的选择说明...............................................................................................194.4绝缘子和穿墙套管的选择说明.......................................................................214.5电流互感器的配置和选择说明.......................................................................224.6电压互感器的配置和选择说明.......................................................................244.7各主要电气设备选择结果...............................................................................245配电装置的选型.........................................................................................................265.1屋内配电装置...................................................................................................265.2屋外配电装置...................................................................................................26第二篇设计计算书................................................................................................................296短路电流计算书.......................................................................................................29600MW火电厂电气主接线方案与设备布置设计7主要电气设备选择计算书.......................................................................................327.1高压断路器的选择计算...................................................................................327.2隔离开关的选择计算.......................................................................................337.3母线的选择计算...............................................................................................347.4绝缘子的选择计算...........................................................................................357.5电流互感器的选择计算...................................................................................357.6电压互感器