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1、摘要摘要隨著國民經(jīng)濟(jì)水平的提高，煤礦產(chǎn)業(yè)發(fā)展壯大，電作為當(dāng)今煤礦生產(chǎn)的主要能源，隨著煤礦產(chǎn)業(yè)的不斷增加，對煤礦供配電系統(tǒng)的要求也隨之增加。35kV變電所是煤礦供電系統(tǒng)的重要組成部分，它給全礦提供了電力保障。因此煤礦供配電系統(tǒng)對經(jīng)濟(jì)效益的提高具有十分重要的意義。此畢業(yè)設(shè)計論文是關(guān)于某煤礦供配電系統(tǒng)的設(shè)計。設(shè)計的內(nèi)容主要包括負(fù)荷計算、變壓器的選擇及短路計算、電氣設(shè)備的選擇以及防雷接地保護(hù)等。用需要系數(shù)法對負(fù)荷統(tǒng)計的結(jié)果進(jìn)行負(fù)荷計算和無功補(bǔ)償。通過負(fù)荷計算來確定此煤礦供配電系統(tǒng)變電所變壓器的容量、臺數(shù)以及型號。利用標(biāo)幺值法對供配電系統(tǒng)進(jìn)行短路電流的計算，給電氣設(shè)備的選擇和校驗提
2、供有力數(shù)據(jù)。根據(jù)此供配電系統(tǒng)的特點，來制定變電所的主接線方式、運(yùn)行方式。由于電氣設(shè)備可能產(chǎn)生漏電現(xiàn)象，變電所受到雷擊，因此需要對變電所進(jìn)行防雷接地的設(shè)計。通過對負(fù)荷計算、短路電流的計算、變壓器的選擇以及防雷接地保護(hù)的確定，提高了設(shè)計的可靠性，組合更加靈活，功能更加完善，降低功率損耗，有效保證礦區(qū)供電安全、穩(wěn)定、高效的運(yùn)行。關(guān)鍵詞：負(fù)荷計算；無功補(bǔ)償；變壓器；防雷接地-43-AbstractAbstractWiththeimprovementofthelevelofthenationaleconomy,coalindustrydevelopmentandgrowth,tod
3、ay'selectricenergyasthemaincoalproduction,withtheincreaseofcoalminingindustry,coalminepowersupplysystemrequirementshaveincreased.35kVsubstationisanimportantpartofcoalminepowersystemthatprovideselectricitytothewholemineprotection.Coalsupplyanddistributionsystemthereforehasgreatsignificance
4、inimprovingeconomicefficiency.Thisgraduationthesisonthesupplyanddistributionsysteminacoalminedesign.Designedmainlyincludeloadcalculation,selectionandtransformershortcircuitcalculation,selectionofelectricalequipmentandlightningprotectionandgroundingprotection.Withthedesiredloadfactormethod
5、ofstatisticalcalculationresultsofloadandreactivepowercompensation.Coalsupplytodeterminethecapacityofthetransformersubstationanddistributionsystem,aswellasthenumberofunitsbytheloadcalculationmodel.Theuseofunitvaluemethodtocalculatethedistributionsystemshort-circuitcurrent,totheselectionand
6、verificationofelectricalequipmenttoprovidestrongdata.Accordingtothissupplytodistributionsystem,todevelopthemainsubstationwiring,operationmode.Sincetheelectricalequipmentmayproduceleakage,substationstruckbylightning,andthereforeneedtoconductminesubstationgroundingdesign.Throughtheloadcalcu
7、lation,calculationofshort-circuitcurrent,thetransformerandlightningprotectiongroundingdeterminedtoimprovethereliabilityofthedesign,acombinationofmoreflexible,moreperfect,reducepowerconsumption,effectivelyguaranteethesafetyofminesupply,stableandefficientrun.KeywordsL
