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兰州交通大学毕业设计（论文）-I-摘要地铁变配电系统提供除电动列车以外所有负荷的电能供应，对地铁的正常运营具有至关重要的作用。在我国加快地铁工程建设，解决公共交通问题的时代背景下，研究地铁变配电系统的工程设计，具有十分的重要意义。首先，本文研究了地铁负荷计算问题，给出了可供地铁变配电负荷计算的地铁单位容量指标建议值和需要系数建议值，并结合实例进行了具体的分析计算。其次，深入研究了地铁变配电系统的特征，给出了实际工程的总体配电方案。根据地铁变配电系统的特点以及城市电网所能提供的外部电源，分析了中压配电网络、降压变电所的功能和构成，分别给出了三种设计方案。接着，阐述了地铁动力负荷划分及供电要求，论述了地铁动力配电系统设计原则、配电线路设计、低压电器选择以及微机电动机综合保护装置的应用，并给出工程案例。最后，研究分析了地铁照明的特点，给出了地铁照明配电及其控制方式、照明质量、灯具选用等设计方法，以及地铁照明设计案例。经上海地铁M8线等工程案例的设计表明，本文所研究给出的地铁负荷计算、地铁总体配电方案、地铁动力配电设计以及地铁照明设计的方法，对于地铁变配电系统的设计具有一定的参考意义。关键词：地铁；负荷计算；变配电；工程设计兰州交通大学毕业设计（论文）-II-AbstractPowertransformationanddistributionsysteminsubwayprovidesallloadselectricenergyexceptelectrictrain,hastheveryimportantfunctionstosubway’snormaloperation.Underthebackgroundofacceleratingconstructionofsubway’sengineeringforresolvingthemasstransitproblemsinourcountry,theresearchonprojectdesignofpowertransformationanddistributionsysteminsubwayisveryimportant.Firstly,thethesisstudiestheproblemofsubway’sloadcalculation,givesoutsuggestionvaluesofsubway'sunittargetanddemandfactorforloadcalculationofsubway’spowertransformationanddistributionsystem,analyzesandcomputestheproblemscombiningwithanexample.Secondly,thisthesisthoroughlystudiesthecharacteristicsofsubway’spowertransformationanddistributionsystem,producestheoverallpowerdistributionplanofactualproject.Basedonthecharacteristicsofsubway’spowertransformationanddistributionsystemandexternalpowerplanincity,thisarticleanalyzesthefunctionsandformationsofthemedium-voltagepowerdistributionnetworkandthesubstation,givesthreekindsdesignplansrespectively.Afterthen,thethesisexplainsloadsdivisionaswellaspowersupplyrequest,discussestheprinciplesofpowerdistributionsystemdesign,designofdistributionline,choicesoflowvoltageelectricapplianceandtheapplicationofmicrocomputerprotectivedeviceofelectricmotors.Intheend,thethesisanalyzesthecharacteristicsofilluminationinsubway,suggestsdesignmeasuresonilluminationpowerdistributionanditscontrollingmodes,illuminationqualities,lampselectionsaswellasthedesigncaseofsubway’sillumination.AftertheM8subwaylineinShanghai,thisthesisstudiesthewaysofloadcalculation,overallpowerdistributionplan,powerdistributiondesignaswellasilluminationdesignmethodinsubway,whichhasthecertainreferencesignificancefordesignofsubway’spowertransformationanddistributionsystem.Keywords:Subway,Loadcalculation,Powertransformationanddistribution，illuminationEngineeringdesign兰州交通大学毕业设计（论文）-III-目录摘要.....................................................................................................................................IAbstract.....................................................................................................................................II1绪论........................................................................................................................................11.1地铁变配电系统设计的背景与意义.........................................................................11.2地铁变配电系统的现状.............................................................................................11.3地铁变配电系统的内容与目标.................................................................................22地铁变配电设计的负荷计算................................................................................................42.1负荷计算的目的和方法.............................................................................................42.1.1单位指标法......................................................................................................42.1.2需要系数法......................................................................................................52.1.3二项式系法数..................................................................................................62.2地铁变配电系统负荷计算实例.................................................................................72.2.1地铁负荷分类..................................................................................................72.2.2地铁负荷计算..................................................................................................72.2.3无功功率补偿................................................................................................122.2.4配电变压器选择............................................................................................132.3地铁的单位容量指标和需要系数...........................................................................152.3.1地铁的单位容量指标....................................................................................152.3.2地铁的需要系数............................................................................................153地铁总体配电方案的工程设计..........................................................................................163.1地铁供电系统概述...................................................................................................163.2地铁中压配电网络...................................................................................................163.2.1集中供电方式................................................................................................163.2.2分散供电方式....................................................