摘要本设计为35KV油田变电所电气部分的设计。设计的主要内容包括：35/6kV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、避雷器等）、继电保护规划设计、防雷保护设计等。根据电气主线设计应满足可靠性、灵活性、经济性的要求，本变电所电气主接线的高压侧采用单母线接线，低压侧采用单母线分段的电气主接线形式；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0.69提高到0.93。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：35kV变电所电气主接线继电保护IAbstractThetopicofthisdesignis"35KVtheoilfieldsubstationelectricalpartofthedesign."Themaindesignelementsinclude:35/6kVmaintransformersubstationchoiceElectricalSubstationmainwiringdesignShort-circuitcurrentcalculation;LoadCalculationReactivepowercompensationElectricalEquipment(busHVcircuitbreakers,isolationswitchesandvoltagetransformer,andcompensationcapacitorMOA),relayPlanningandDesign;Lightningprotectiondesign.Accordingtothemainlineofelectricaldesignshouldmeetthereliability,flexibility,economyrequirements,ThesubstationmainelectricalwiringHighSidesingle-buswiring,lowvoltagesideofthesingle-busabovethemainelectricalwiringform;thelow-pressuresideloadcalculatedusingthestatisticalneedscoefficient.Toreducethereactivepowerloss,increasedenergyutilization,Thedesignofreactivepowercompensationdesign,powerfactorfrom0.69to0.93.short-circuitcurrentcalculationsincludeshort-circuitpointfortheselectionandspecificnumericalcalculation,andelectricalequipmentchosenbythechoiceofratedcurrent,short-circuitcurrentcalculationbytheresultsofthecalibrationmethods.relaydesignofthemaintransformerCurrentProtectionandover-currentprotectiondesign.distributioninstallationscompletesetofpowerdistributionequipment.Thesubstationusingdirectlightningstrokepreventionlightningprotection.Keywords：35kVSubstationdesignMainelectricalwiringRelayprotectionII目录摘要.......................................................IAbstract.........................................................II目录.......................................................I第1章绪论...................................................11.1课题的目的及意义.....................................11.235kV变电所设计模式的研究与发展......................11.3设计内容.............................................3第2章变压器的选择与负荷预测................................42.1变压器的选择.........................................42.1.1变压器的容量及台数的确定....................42.2负荷预测.............................................52.2.1周边地区油田产能负荷..........................62.2.2地区负荷.....................................62.3无功功率补偿.........................................72.3.1并联电力电容器补偿............................72.3.2无功补偿容量的计算............................8第3章电气主接线.............................................103.1对电气主接线的基本要求和原则........................103.1.1电气主接线的基本要求..........................103.1.2电气主接线的基本原则..........................113.2主接线设计...........................................113....
