外文文献变电站自动化分析.docx

外文文献变电站自动化分析.docx

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外文文献变电站自动化分析

IntegratedSubstationAutomationSystemAnalysis

Abstract

Alongwiththeeconomicdevelopmentandthemodernindustrydevelopmentsofquickrising,thedesignofthepowersupplysystembecomemoreandmorecompletelyandsystem.Becausethequicklyincreaseelectricityoffactories,italsoincreasesseriouslytothedependableindexoftheeconomiccondition,powersupplyinquantity.Thereforetheyneedthehigherandmoreperfectrequesttothepowersupply.WhetherDesignreasonable,notonlyaffectdirectlythebaseinvestmentandcirculatetheexpenseswithhavethemetaldepletionincolourmetal,butalsowillreflectthedependableinpowersupplyandthesafeinmanyfacts.Inaword,itisclosewiththeeconomicperformanceandthesafetyofthepeople.Thesubstationisanimportancepartoftheelectricpowersystem,itisconsistedoftheelectricappliancesequipmentsandtheTransmissionandtheDistribution.Itobtainstheelectricpowerfromtheelectricpowersystem,throughitsfunctionoftransformationandassign,transportandsafety.Thentransportthepowertoeveryplacewithsafe,dependable,andeconomical.Asanimportantpartofpower’stransportandcontrol,thetransformersubstationmustchangethemodeofthetraditionaldesignandcontrol,thencanadapttothemodernelectricpowersystem,thedevelopmentofmodernindustryandtheoftrendofthesocietylife.

Electricpowerindustryisoneofthefoundationsofnationalindustryandnationaleconomicdevelopmenttoindustry,itisacoal,oil,naturalgas,hydropower,nuclearpower,windpowerandotherenergyconversionintoelectricalenergyofthesecondaryenergyindustry,itfortheotherdepartmentsofthenationaleconomyfastandstabledevelopmentoftheprovisionofadequatepower,anditslevelofdevelopmentisareflectionofthecountry'seconomicdevelopmentanimportantindicatorofthelevel.Asthepowerintheindustryandtheimportanceofthenationaleconomy,electricitytransmissionanddistributionofelectricenergyusedintheseareasisanindispensablecomponent.。

Therefore,powertransmissionanddistributioniscritical.Substationistoenablesuperiorpowerplantpowerplantsorpowerafteradjustmentstothelowerloadofbooksisanimportantpartofpowertransmission.Powerplantsandsubstationsareconnecteduserlinkinthemiddle,transformationanddistributionofelectricenergytoplaytherole.Operationofitsfunctions,thecapacityofadirectimpactonthesizeofthelowerloadpower,therebyaffectingtheindustrialproductionandpowerconsumption.Substationsystemifalinkfailure,thesystemwillprotectthepartofaction.Mayresultinpoweroutagesandsoon,totheproductionandlivingagreatdisadvantage.Therefore,thesubstationintheelectricpowersystemfortheprotectionofelectricityreliability,sensitivityandotherindicators.

Substationshavebeenequippedwithvariousprotectiondevices,thesedevicesarebasedonlowershort-circuitloadtoamaximumloadconditions,suchasconfigurationsettingsand,therefore,intheeventofthefailurewassimilartothespecificcircumstancesundertojudgebythesystemshouldautomaticallytripprotection,andnowtheprotectionofthewholetriphasbeenaveryshorttime,theliftingofthefault,thesystemwillautomaticallyreclosingdevicesandthegatewaytorestorepowerquickly.Thisistoprotectthelowertheloadisveryfavorable.Thiswillnotonlyprotectthesafetyoftheloadequipmentisinfavorofextendingtheservicelifeandreduceequipmentinvestment,andimprovedreliabilityofelectricitysupply,whichistoimprovetheefficiencyofindustrialandagriculturalproductionisveryeffective.Substationshavebeenequippedwithvariousprotectiondevices,thesedevicesarebasedonlowershort-circuitloadtoamaximumloadconditions,suchasconfigurationsettingsand,therefore,intheeventofthefailurewassimilartothespecificcircumstancesundertojudgebythesystemshouldautomaticallytripprotection,andnowtheprotectionofthewholetriphasbeenaveryshorttime,theliftingofthefault,thesystemwillautomaticallyreclosingdevicesandthegatewaytorestorepowerquickly.Thisistoprotectthelowertheloadisveryfavorable.Thiswillnotonlyprotectthesafetyoftheloadequipmentisinfavorofextendingtheservicelifeandreduceequipmentinvestment,andimprovedreliabilityofelectricitysupply,whichistoimprovetheefficiencyofindustrialandagriculturalproductionisveryeffective.Increaseintheefficiencyofindustrialproductsmeanslowerproductcosts,increasemarketcompetitiveness,whichwillenableenterprisestoincreaseforthenationaleconomyandmakeagreatercontributiontodevelopment.Electricitysupplyreliabilityandotherfields,canimprovepeople'squalityoflife,improvetheirlivingconditions.

Inrecentyears,ascomputersanddigitalcommunicationtechnology,secondarysubstationequipmentisbasicallyacomputer-based.Computerprotection,computermonitoringdeviceinthesubstationhavebeenwidelyused,whichgreatlyraisedthelevelofautomationinpowersystemreliabilityandoperation,hasachievedalotofunmannedsubstations.However,duetodifferencesinprofessionalstandards,differentmanufacturersusedinthedesignofsubstationautomationprogramsarenotthesame,thusleavingthemajorityofusersataloss.

Substationrelayprotection,faultrecorder,localandremotemonitoringnotonlyofdifferentfunctions,andtherealizationoftheprinciplesandtechniquesarealsodifferent.Thus,thelong-standingexpertiseindifferenttechnologiesandthecorrespondingmanagementdepartments.Withthemicroprocessor-basedprotection,computercontrolandremotecomputerdevices,suchaswidelyused,itwasnotedthatdespitethedifferentfunctionsofthesedevices,thehardwareconfigurationisthesame,thecollectionandtocontrolmanyofthesameobject.Thus,itappearsfromtheoverallsituationtoconsidertheideaofsubstationautomation.However,insubstationautomationtechnologies,theimplementationprocessoftherelay,measure,control,remotefeatures,aswellastherelationshipbetweenthem,arestillsomeproblemsworthyofourstudy.

Keywords:

substationautomation

Thefollowingcurrentlyusedformanydomesticsubstationautomationdesignpractical,fromthesecondarysystemanalysisandcomparisonofseveralaspects.

1Systemstructure

Thewholesystemlevelbythestationmanagement,industrialbusnetworklayerandspacinglayeriscomposedofthreeparts,thesystemofallmonitoring,protectiveequipmentaremodularunitsofthestructuraldesign,accordingtothevoltagesubstationlevel,thesizecanbeflexibleanduserrequirements.Becauseofthecentralizedsystemisnolongerused,itisnolongerhere,thefollowingdescribesonlythestructureofdistributedsystems.

1.1Function-orienteddistributedsystems

Afunctionofeachunitcompleted,thesystemfunctionscanbedividedinto:

ACandDCmeasurementunit,remoteacquisitionunit,remotecontrolandoperationunit,pulseenergycollectionunits,suchastheprotectionunit.Theadvantagesofsuchsystemsisthefunctionalunitwiththecommunicationbusbetweenthecompleteseparationoftheelectrical,anyfaultonthesystemunithasnoeffectontherestofthesystem.Thedisadvantageisthatmulti-screengroup,therelativecomplexityofthesecondwiring,poorscalability,decentralizedunitscannotbeinstalled.

1.2Interval-orienteddistributedsystem

Powertransmissionlinetosubstationisdividedintoanumberofintervals,suchasintothelinespacing,transformerspacing,roundlayout.Relativelyindependentofthespacingofequipment,onlythroughtheInternetcommunicationnetworkstationswithstation-levelcomputerstocommunicate.Intervalofeachlayerbytelemetry,remote,remotecontrol,theprotectionofthedistributionofmulti-CPUconfiguration,andtheintroductionofcomputersinthedesignoflocalareanetworktechnology,thedistributionfunction,asfaraspossibletheprincipleofdecentralization,which,thoughgreatlyimprovedthereliabilityof,anyintervalfailurewillnotaffecttheotherpartitions,butthereliabilityofeachintervalisrelativelylow,ifanyintervalafaultwillaffectthewholeinterval.

1.3Object-OrientedDistributedSystems

Thatis,aunitofanobjectintoeachline,eachround,eachtransformer,capacitorscanbetargeted.Thisisatruefull-distributedsubstationautomationsystem,whichbroketheoriginallimitsofthefunctionsoftheseconddevice,inaccordancewiththerequirementsofsubstationautomationreorganization.Thisobject-orienteddistributedsystemsinlinewiththeInternationalElectrotechnicalCommission'stechnicalspecifications,isthefuturedirectionofdevelopment.Ithasthefollowingfeatures:

greatlyimprovedsystemreliability,partialfailuredoesnotaffectthesystem;relativelyindependentmodules,eachaffectedsmall;datasharinggood;systemefficiency;multi-functionintegratedcontrolapproach,makingtheoperationofequipmentmanagementverysimple,lowmaintenance;anti-interferenceability;goodscalability;stationsneededtheSecondcablegreatlyreduced,savinginvestment.

2Dual-busnetworkandasinglenetworkstructure

Stand-levelmanagementandmonitoringlayertoprotectthedataandcommandsbetweenthetransmissionnetworkcanbedoubleorsinglenetworkstructure.Hubforthe110kVsubstation,adualnetworkstructuretofacilitatealargeflowofdatatoensurerapiddeliverywhenallkindsofsignals,andtoimproveitsreliability.Dual-networkapproach,usuallyanindependentgrouptomonitorandprotectthenetwork,inthetransmissionlineor