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What are the causes of transformer leakage?
Release time:
2019-08-11 18:44
Leakageoftransformersisacommonproblemintransformerfaults.Inparticular,sometransformersthathavebeeninoperationforalongtimearemorecommon.Theappearanceoflightpollutionequipmentisbeautiful,andtheheavyequipmentthreatensthesafeoperationofequipmentandeventhelifeofpersonnel.Leakageoftransformersincludesairinandout(Normallyexceptfortheairenteringthedehumidifier)andoilleakage.So,whatarethecausesoftransformerleakage?Todayweexplainindetailthecausesoftransformerleakage. Therearetwomainreasonsfortheleakage:ontheonehand,itislatentinthetransformerdesignandmanufacturingprocess;ontheotherhand,itiscausedbyimproperinstallationandmaintenanceofthetransformer.Themainleakagepartsofthetransformeroftenappearinradiatorinterfaces,flatdiscvalvehats,casings,porcelainbottles,welds,sandholes,flangesandotherparts.
What is the prospect of the variable frequency power supply market?
Sincethepromulgationofthe12thFive-YearPlan,energyconservationandemissionreductionhavebecomethekeytothedevelopmentofvariousindustries,constantlyregulatingvariousenergy-savingandenvironmentallyfriendlyproducts,makingtheapplicationoftheindustrymoreextensiveandtheprospectsclearer. Benefitingfromthestrategyofenergysaving,greeningandenvironmentalprotection,thesustainabledevelopmentofChina'svariablefrequencypowersupplyindustryhasbeenaccelerated,makingChina'svariablefrequencypowersupplyindustrycontinuetoexpandthemarketshareoftheindustry,andrelyingonstrongdevelopmenttobecomeanimportantpartofChina'sindustrialeconomicdevelopment.basepoint. Atpresent,Chinaisinthestageofacceleratingindustrializationandurbanization.Theshortageofenergyresourcesandthefragileecologicalenvironmentwillbefurtheraggravated.Therefore,thelevelofenergy-savingandenvironmentalprotectiontechnologyequipmentandservicesinChinawillbecontinuouslyimproved,andlarge-scaleenergy-savingemissionreductionandvigorousdevelopmentcyclewillbecarriedout.ProvidingsolidindustrialsupportisaninevitablechoiceforChinatochangeitsdevelopmentmodeandadjustitseconomicstructure. Fromthisperspective,China'senergy-savingandenvironmentalprotectionindustryhasgreatpotentialandstimulatesbroadprospectsforeconomicgrowth.China'svariablefrequencypowersupplymarketiscurrentlyinaperiodofrapidgrowth,andiswidelyusedintextilemachinery,airconditioning,elevators,metallurgyandotherindustries.Inthepastfewyears,themarketofChineseinvertershasmaintainedahighgrowthrate. Inrecentyears,China'svariablefrequencypowersupplymarketismaintainingagrowthrateof12%-15%.Itisexpectedthatwithinfiveyears,themarketdemandforvariablefrequencypowersupplywillcontinuetomaintainagrowthrateofmorethan10%.After10years,thevariablefrequencypowersupplymarketwillgraduallybecomesaturated.
Transformer industry: How do companies compete for the future market?
Asthemainpowerequipmentforpowertransmissioninthepowergrid,thetransformerisoneofthemostcommondevicesinthefieldofelectricalequipment.Inthetransformerindustry,China'smarkethasgrownrapidlyandhasbecomethesecondlargestmarketintheworld.Fromthecurrentmarketsituation,China'stransformermarkethasbeendrivenbysmartgridconstruction,UHVconstructionandpowergridtransformation,andpowerindustrydevelopment.Itisfullyactivatedandwillusherinaneweraofrapiddevelopmentinthenextfewyears. Transformerdemandisgrowingrapidly,andtheprospectsareconsiderable. Inrecentyears,China'spowerdemandhasgrownrapidly,andthehigh-speedconstructionandinvestmentofpowergridshavedriventhemarketdemandforpowertransmissionandtransformationequipment.Thehugeamountofelectricityconstructioncapitalhasbroughtopportunitiesandchallengestothetransformerindustry,whichhasledtotherapiddevelopmentofthetransformerindustry. In2011,thenationaltransformeroutputreached1.43billionkVA,anincreaseof6.86%.In2011,therewere1,461enterprisesabovedesignatedsizeinChina'stransformermanufacturingindustry,achievingsalesof290.14billionyuan,achievingatotalprofitof16.608billionyuan;assetsof268.84billionyuan,andproductsalesprofitof33.972billionyuan.In2013,China'stransformerindustrysalesrevenuewas368.034billionyuan,anincreaseof16.07%. From2012to2020,China'stransformermarketwillenterahigh-speeddevelopmentperiodunderthedirectinfluenceofdomesticpowergridconstructionandtransformation,andtheindustrialscalewillcontinuetoincrease.Itisestimatedthatby2015,China'stransformeroutputwillexceed2billionkVA. Transmissionanddistribution,powergridconstructionbooststransformerindustrydevelopment Someexpertshaveanalyzedthatinthenextfewyears,drivenbypowertransmissionanddistributionandpowergridconstruction,thegrowthrateofpowertransformerswillremainataround10%duringthe12thFive-YearPlanperiod. Itisunderstoodthatduringthe"TwelfthFive-YearPlan"period,theStateGridCorporationwillinvestmorethan300billionyuanfortheexchangeofUHVconstruction.In2015,itwillformthe"Three-China"exchangeUHVsynchronouspowergridwith"threeverticalandthreehorizontal"asthecore.Thereare38high-voltagesubstations,withacapacityof260millionkVA,andanewUHVAClineof26,000km.15DCprojectshavebeendevelopedwithatotalcommutationcapacityof230millionkilowattsandatotallengthof25,000kilometers. Thetransformationofthedomesticruralnetworkhasprovidedastrongdrivingforcefortheincreaseinthedemandforthetransformermarket.China'snewroundofruralpowergridtransformationandupgradinghasachievedpositiveresults.AsofNovember2013,thetwomajorpowergridenterpriseshavecompletedanewroundofruralpowergridtransformationandupgradingandelectricityinvestmentinpower-freeareasof276.18billionyuan.AccordingtotheinvestmenttargetofruralpowergridreconstructiondisclosedbyStateGridandChinaSouthernPowerGrid,thetotalinvestmentofthetwomajorpowergridcompanieswillexceed500billionyuanduringthe“TwelfthFive-YearPlan”period.ChinaNetisexpectedtoinvestnearly400billionyuan,andSouthChinaNetworkisexpectedtoinvest111.6billionyuan..Thetransformationofruralpowergridwilldirectlyincreasetheinvestmentinpowergridconstruction,andmakeabigcakeshareforthepowerequipmentmanufacturingindustry.Thetransformerindustrywillusherinanewperiodofdevelopmentopportunities. Newenergygenerationbringsnewopportunitiesfortransformers.FromtheperspectiveofsomenewenergypowergenerationindustriesinChina,theinstalledcapacityofpowergenerationsuchaswindpower,photovoltaicpowergeneration,waste-to-energygeneration,andwasteheatpowergenerationhasmaintainedgrowth.Bytheendof2012,thecumulativeinstalledcapacityofwindpowerinthecountrywas60.83millionkilowatts,ayear-on-yeargrowthrateof35%,thecumulativeinstalledcapacityofphotovoltaicpowergenerationwascloseto5,000megawatts,andthenewlyinstalledcapacityofwasteheatpowergenerationwasabout800megawatts. Transformersarethenecessarytransmissionanddistributionequipmentforthepowergenerationindustry,andthedemandiscloselyrelatedtotheinvestmentscaleofthepowergrid.Therapiddevelopmentofthenewenergypowergenerationindustryhasprovidedthemwithbetterdevelopmentopportunities,andhasalsobecomeanimportantdirectionfortransformermanufacturerstoseizethemarketsegmentsandexpandtheirbusinessscope.Atthesametime,italsopromotedtheoptimizationoftransformerproductstructureandtechnologicalinnovation. Theglobaltransformerindustrymarketwillexceed100billionin2020 Inrecentyears,theglobalmarketdemandfortransmissionanddistributionequipmenthasgenerallyincreased.Accordingtoresearchinstitutions,thepowertransformerexpansion,economicgrowthanddemandforelectricityinemergingcountrieswilldrivetheglobalpowertransformermarket,from$10.3billionin2013to$19.7billionin2020(aboutRMB119.1billion).Yuan),thecompoundannualgrowthratereached9.6%. DemandforelectricityinChina,IndiaandtheMiddleEasthasgrownrapidly,becomingthemaingrowthdriverforthegrowthoftheglobalpowertransformermarket.Inaddition,theneedtoreplaceandupgradeoldtransformersinNorthAmericaandEuropehasalsobecomethemaindriverofthemarket.“TheUKpowergridisalreadyverybackward.Onlywhenthegridisreplacedandupgraded,thecountrywillnothavea
Frequency Power
Release time:
2018-01-31 10:54
ThevariablefrequencypowersupplyisapowersupplythatconvertsthealternatingcurrentinthecommercialpowerthroughAC→DC→AC,andoutputstheoutputasapuresinewavewithadjustableoutputfrequencyandvoltagewithinacertainrange.Itisdifferentfromthevariablefrequencyspeedcontrollerusedformotorspeedregulation,andalsodifferentfromordinaryACpowersupply.TheidealACpowersupplyischaracterizedbystablefrequency,stablevoltage,internalresistanceequaltozero,andthevoltagewaveformispuresinewave(nodistortion);thevariablefrequencypowersupplyisveryclosetotheidealACpowersupply.Therefore,moreandmoreadvancedpowersupplywillbeusedinadvanceddevelopedcountries.Itisusedasastandardpowersupplytoprovidethebestpowersupplyenvironmentforelectricalappliances,andtoobjectivelyassessthetechnicalperformanceofelectricalappliances. Thevariablefrequencypowersupplyisahigh-performanceprecisionpowersupplywithIGBTinverteroutputtechnologyandadvancedmicroprocessorcontrol.Ithasover-current,short-circuit,over-voltage,overloadandotherprotectionandalarmfaultdisplayfunctionstoensuretheuseofelectricalequipmentandfrequencyconversion.Powersupplysecurity.Ithasstrongloadadaptability,goodoutputwaveformquality,goodman-machineinterface,simpleoperation,smallsizeandlightweight.Thepuresinewaveoutput,variablefrequencypowersupplywithadjustableoutputvoltageandfrequencyprovidestherequiredACpowerfortheelectricalequipment. Thepurposeandfieldofvariablefrequencypowersupplyapplication: Duetotheinconsistencyofgridindicatorsinvariouscountriesaroundtheworld,exportingelectricalappliancemanufacturersneedpowersupplytosimulatethegridstatusofdifferentcountries,providingengineerswithpureandreliableapplicationsinproductdevelopment,productionlinetestingandqualityassuranceproducttesting,life,andhighvoltage/lowvoltagesimulationtesting.,lowharmonicdistortion,highstabilityfrequencyandvoltageregulationofsinewavepoweroutput;usersofimportedoriginalelectricalappliancesandequipmentalsoneedtotransformandfrequencychangethepowergridtoensurethenormaloperationofimportedelectricalappliancesandequipment;meetaviationelectronicsAndthedemandformilitaryequipment.
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