高強(qiáng)度封閉母線槽知識
密集母線槽,高強(qiáng)度封閉母線槽(CFW)
Densebusduct,highstrengthenclosedbusduct(CFW)
該工藝不受板材的限制,外殼做成華夫餅狀,提高了母線的機(jī)械強(qiáng)度,母線的水平截面可達(dá)13m,由于外殼的盤繞,凹槽的位置被有意分開固定,母線之間的距離為18mm。線路間通風(fēng)良好,明顯提高了母線槽的防潮散熱功能,更適合華南地區(qū)的氣候;線路間有一定的空隙,會引起導(dǎo)線溫度的升降,從而提高了過載能力,降低了磁振蕩噪聲。但其雜散電流和電感電抗遠(yuǎn)大于密集型母線,因此其導(dǎo)電桿截面必須大于密集型絕緣插入式母線截面。
Theprocessisnotlimitedbytheplate,andtheshellismadeintowaffleshape,whichimprovesthemechanicalstrengthofthebus.Thehorizontalsectionofthebuscanreach13m.Duetothewindingoftheshell,thepositionofthegrooveisdeliberatelyseparatedandfixed,andthedistancebetweenthebusesis18mm.Thegoodventilationbetweenthelinesobviouslyimprovesthemoisture-proofandheatdissipationfunctionofthebusduct,whichismoresuitablefortheclimateofSouthChina;thereisacertaingapbetweenthelines,whichwillcausetheriseandfalloftheconductortemperature,thusimprovingtheoverloadcapacityandreducingthemagneticoscillationnoise.Butitsstraycurrentandinductancereactancearemuchlargerthanthatofthedensetypebus,sothesectionofitsconductingrodmustbelargerthanthatofthedensetypeinsulationplug-inbus.
空氣塞母線槽(BMC)
Airplugbusduct(BMC)
由于總線之間的連接器和銅的軟結(jié)合,南方地區(qū)的天氣潮濕,連接器容易氧化,這使得連接器和總線之間的接觸不良,并使接觸點(diǎn)易于加熱,因此在南方地區(qū)很少使用。節(jié)點(diǎn)間體積過大,水平母線截面尺寸不一致,外形不美觀。
Duetothesoftcombinationofconnectorsandcopperbetweenbuses,theweatherinsouthernChinaishumidandtheconnectorsareeasytooxidize,whichmakesthepoorcontactbetweenconnectorsandbusesandmakesthecontactpointseasytoheat,soitisrarelyusedinsouthernChina.Thevolumebetweennodesistoolarge,thecrosssectionsizeofhorizontalbusisinconsistent,andtheappearanceisnotbeautiful.
密集絕緣插入式母線槽(CMC)
Denseinsulatedplug-inbusduct(CMC)
其含水量和散熱效果較差。在防潮方面,母線在施工過程中容易受到潮濕和水的影響,導(dǎo)致相間絕緣電阻降低??蛙嚨纳嶂饕Q于外殼。由于導(dǎo)線排列緊湊,L2和L3相的熱能分布緩慢,母線槽溫升很高。密集絕緣插入式母線只能產(chǎn)生不超過3m的水平段,受外板限制。由于母線間氣隙小,當(dāng)母線通過大電流時(shí),會產(chǎn)生強(qiáng)大的電力,導(dǎo)致磁振蕩頻率疊加,產(chǎn)生過大的噪聲。插入式母線槽是一種干線系統(tǒng),具有體積小、結(jié)構(gòu)緊湊、運(yùn)行可靠、傳輸電流大、分接饋電方便、維護(hù)方便、能耗低、動態(tài)熱穩(wěn)定性好等優(yōu)點(diǎn)
Itswatercontentandheatdissipationeffectarepoor.Intheaspectofdampproof,thebusiseasytobeaffectedbydampnessandwaterintheconstructionprocess,whichleadstothedecreaseofinsulationresistancebetweenphases.Theheatdissipationofthebusmainlydependsontheshell.Duetothecompactarrangementofconductors,thethermalenergydistributionofL2andL3phasesisslow,andthetemperatureriseofbusductisveryhigh.Theplug-inbuswithdenseinsulationcanonlyproduceahorizontalsectionofnomorethan3m,whichislimitedbytheouterplate.Duetothesmallairgapbetweenbuses,whenbusespassthroughlargecurrent,strongpowerwillbegenerated,resultinginthesuperpositionofmagneticoscillationfrequencyandexcessivenoise.Theplug-inbusductisakindoftrunksystem,whichhastheadvantagesofsmallvolume,compactstructure,reliableoperation,largetransmissioncurrent,convenienttapandfeed,convenientmaintenance,lowenergyconsumption,gooddynamicthermalstability,etc
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