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1、本科生畢業(yè)設計（論文）摘要本設計的主要內(nèi)容包括：10/0.4kV變電所主變壓器選擇；變電所電氣主接線設計；短路電流計算；負荷計算；無功功率補償；電氣設備選擇（母線、高壓斷路器、隔離開關(guān)、電流互感器、電壓互感器、避雷器和補償電容器）；配電裝置設計；繼電保護規(guī)劃設計；防雷保護設計等。根據(jù)電氣主線設計應滿足可靠性、靈活性、經(jīng)濟性的要求，本變電所電氣主接線的高壓側(cè)采用單母線接線，低壓側(cè)采用單母線分段的電氣主接線形式；對低壓側(cè)負荷的統(tǒng)計計算采用需要系數(shù)法；為減少無功損耗，提高電能的利用率，本設計進行了無功功率補償設計，使功率因數(shù)從0.69提高到0.9；短路電流的計算包括短路點的選擇及其
2、具體數(shù)值計算；而電氣設備選擇采用了按額定電流選擇，按短路電流計算的結(jié)果進行校驗的方法；繼電保護設計主要是對變壓器進行電流速斷保護和過電流保護的設計計算；配電裝置采用成套配電裝置；本變電所采用避雷針防直擊雷保護。本設計十分注重運用我國電氣設計的新技術(shù)和新的設備，實用性及強，考慮到是實際工程的應用，便以通俗易懂的語言進行闡述。關(guān)鍵詞：變電所設計；電氣主接線；繼電保護VII本科生畢業(yè)設計（論文）AbstractThedesignonthetopicof"LiaoningInstituteofTechnologyTeachingBuildingsubstationexpansionp
3、reliminarydesign."Themaindesignelementsinclude:10/0.4kVmaintransformersubstationchoice;ElectricalSubstationmainwiringdesign;Short-circuitcurrentcalculation;LoadCalculation;Reactivepowercompensation;ElectricalEquipment(bus,HVcircuitbreakers,isolationswitches,currenttransformerandvoltagetrans
4、former,andcompensationcapacitorMOA);DistributionEquipmentdesign;relayPlanningandDesign;Lightningprotectiondesign.Accordingtothemainlineofelectricaldesignshouldmeetthereliability,flexibility,economyrequirements,ThesubstationmainelectricalwiringHighSidesingle-buswiring,lowvoltagesideofthesing
5、le-busabovethemainelectricalwiringform;thelow-pressuresideloadcalculatedusingthestatisticalneedscoefficient;Toreducethereactivepowerloss,increasedenergyutilization,Thedesignofreactivepowercompensationdesign,powerfactorfrom0.69to0.9;short-circuitcurrentcalculationsincludeshort-circuitpointfo
6、rtheselectionandspecificnumericalcalculation;andelectricalequipmentchosenbythechoiceofratedcurrent,short-circuitcurrentcalculationbytheresultsofthecalibrationmethods;relaydesignofthemaintransformerCurrentProtectionandover-currentprotectiondesign;distributioninstallationscompletesetofpowerdi
7、stributionequipment;Thesubstationusingdirectlightningstrokepreventionlightningprotection.Thedesignisverycloseattentiontotheuseofourelectricaldesignofthenewtechnologyandnewequipment,practicalandstrong,Takingintoaccounttheactualapplication,inauser-friendly
