某电机修造厂总降压变电所及高压配电系统设计

摘要电力行业作为国家经济的命脉之一，无论在工农业建设还是普通民用都扮演着中流砥柱的作用，为社会主义现代建设奠定了坚实的基础。宏观意义电力行业需要通过客观缜密的工厂供配电系统设计体现，这是本设计的价值所在。本设计内容针对郑州某电机修造厂的供配电设计，据任务书要求，通过查阅相关资料文献，运用大学阶段学习成果，通过具体讨论工厂配电系统方案设计的原理，进行总体设计和详细分析说明，包括：负荷计算和无功功率补偿、变电所位置和型式的选择、变电所主变压器台数和容量、类型的选择、变电所主接线方案、短路电流的计算、变电所一次设备的选择与校验、变电所出线的选择、变电所二次回路方案的选择与继电保护的整定、防雷保护与接地装置。以科学严谨的方法完成本设计的内容，达到设计任务书的要求，将电力行业中的单元组成——工厂供配电系统设计反应出来。关键词：负荷计算短路电流计算主接线方案继电保护整定防雷和接地:loadcalculationandreactivepowercompensation,substationlocationandtypeselection,andthenumberofmaintransformersubstationcapacity,typeofselection,substationmainWiring,short-circuitcurrentcalculations,asubstationequipmentselectionandvalidation,substationoutletchoice,substationsecondarycircuitprogramselectionandtuningprotection,lightningprotectionandgroundingdevices.Rigorousscientificmethodtocompletethecontentofthisdesign,tomeetthedesignrequirementsofthemissionstatement,theelectricpowerindustryintheunits-factoriesreflectedsupplyanddistributionsystemdesign.Keywords:Loadcalculations,shortcircuitcurrentcalculation,MainWiring,relaysetting,lightningprotectionandgrounding目录目录摘要...............................................................IIABSTRACT...........................................................II1绪论..............................................................11.1工厂供电的目的意义..............................................11.2本次设计的任务要求..............................................21.3设计资料........................................................21.4工厂平面图......................................................32负荷计算和无功功率补偿............................................42.1负荷计算.....................................................42.1.1负荷计算概述...............................................42.1.2按需要系数法确定计算负荷...................................42.1.3多组用电设备计算负荷的确定.................................52.1.4工厂各车间负荷计算表.......................................62.1.5全厂负荷计算...............................................62.2无功功率的补偿...............................................73变电所参数的确定.................................................103.1总降压变电所位置的选择......................................103.2总降压变电所型式的选择......................................123.3总降压变电所主变压器台数的选择..............................123.4总降压变电所主变压器容量的选择..............................123.5总降压变电所主变压器的选择..................................134变电所主接线方案的设计...........................................144.1变电所主接线方案的设计原则与一般要求........................144.2变电所主接线的接线方式......................................144.3变电所主接线图..............................................155短路电流的计算...................................................165.1短路电流计算方法............................................165.2短路电流计算过程............................................175.2.1最大运行方式..............................................175.2.2系统最小运行方式..........................................195.2.3三相短路电流统计表........................................196总降压变电所一次设备的选择与校验.................................206.1一次设备选择与校验的条件与项目..............................206.1.1按正常工作条件选择........................................206.1.2按短路条件校验............................................206.235kV侧一次设备选择与校验...................................216.310kV侧一次设备选择与校验...................................226.4高压开关柜的选择...........................................236.5母线的选择.................................................237变电所进出线的选择与校验.........................................247.1进出线方式的选择............................................247.2进出线的选择与校验条件......................................247.2.1按发热条件选择导线和电缆的截面............................24目录7.2.2按经济电流密度选择导线和电缆的截面........................257.2.3电压损耗的计算............................................257.3变电所35kV侧进线的选择.....................................257.4变电所出线的选择............................................267.5备用电源线的选择............................................277.6车间馈线的选择..............................................277.7进出线选择结果..............................................288变电所二次回路方案的选择与继电保护的整定.........................298.1高压断路器的操动机构控制与信号回路..........................298.2电能计量回路................................................298.3测量和绝缘监察回路..........................................298.4继电保护概述................................................298.4.1对继电保护装置的基本要求..................................298.4.2继电保护的灵敏系数........................................308.5电力变压器的继电保护......................................