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Meaning

Themostconcisedefinitionofdistributedpoweris:35kVandbelowthepowersupplythatisnotdirectlyconnectedtothecentralizedtransmissionsystem,whichmainlyincludespowergenerationequipmentandenergystoragedevices.

Advantages

(1)Economical:Becausedistributedgenerationislocatedontheusersideandclosetotheloadcenter,theconstructioncostandlossofthetransmissionanddistributionnetworkaregreatlyreduced;atthesametime,thedistributionPowergenerationplanningandconstructioncycleisshort,investmentiseffective,andinvestmentriskissmall.

(2)Environmentalprotection:Distributedpowergenerationcanmakeextensiveuseofcleanandrenewableenergy,reducingtheconsumptionoffossilenergyandtheemissionofharmfulgases.

(3)Flexibility:Distributedpowergenerationsystemsmostlyusesmallandmedium-sizedmodularequipmentwithadvancedperformance,whicharefastonandoff,convenientformaintenanceandmanagement,flexibleadjustment,andeachpowersourceisrelativelyindependent,whichcanmeetpeakshavingandfilling.Valley,powersupplyforimportantusersandotherdifferentneeds.

(4)Security:Therearevariousformsofdistributedpowergeneration,whichcanreducethedependenceonasingleenergysourceandalleviatetheexpansionoftheenergycrisistoacertainextent;atthesametime,thedistributedpowergenerationlocationisscattered,anditisnotvulnerabletoaccidentaldisasters.Ortheimpactofemergencieshasthepotentialtowithstandlarge-scaleblackouts.

Features

Distributedenergysystemsdonotsimplyusetraditionalpowergenerationtechnologies,butarebasedonnewtechnologiessuchasautomaticcontrolsystems,advancedmaterialtechnologies,andflexiblemanufacturingprocesses.Onthebasis,anewenergyproductionsystemwithlowpollutionemissions,flexibility,convenience,highreliabilityandhighefficiency.

Thepowergenerationsystemthatcomposesthedistributedenergysystemhasthefollowingcharacteristics:

①Efficientuseofwasteenergygeneratedbypowergenerationtogenerateheatandelectricity;

②Uusiutuvan energian järjestelmä;

③Includesanenergyrecyclingsystemthatuseson-sitewastegas,wasteheatandexcesspressuretogenerateelectricity.

Classification

DistributedGeneration(DG)devicescanbedividedintocogenerationpowergeneration,internalcombustionenginepowergeneration,gasturbinepowergeneration,andsmallhydropowergenerationaccordingtodifferenttechnologiesused.,Windpower,solarphotovoltaicpowergeneration,fuelcells,etc.;accordingtothetypeofenergyused,DGcanbedividedintofossilenergy(coal,oil,naturalgas)powergenerationandrenewableenergy(wind,solar,tidal,biomass,smallhydropower,etc.))Twoformsofpowergeneration.DistributedEnergyStorage(DES)devicesrefertoenergystorageandconversiondevicesthataremodular,canbequicklyassembled,andconnectedtothepowerdistributionnetwork.Accordingtodifferentformsofenergystorage,DEScanbedividedintoelectrochemicalenergystorage(suchasbatteryenergystoragedevices),electromagneticenergystorage(suchassuperconductingenergystorageandsupercapacitorenergystorage,etc.),mechanicalenergystoragedevices(suchasflywheelenergystorageandCompressedairenergystorage,etc.),thermalenergystoragedevices,etc.Inaddition,thefast-developingelectricvehiclescanalsosendelectricitytothedistributionnetworkwhenneeded,soitisalsoakindofDES.

Definition

Thedefinitionofdistributedpoweristhatitislocatedneartheuser,thegeneratedpowercanbeusedon-site,anditisconnectedtothegridatavoltagelevelof10kVandbelow,andasinglegrid-connectedpointhasatotalPowergenerationprojectswithinstalledcapacitynotexceeding6MW.Includingsolarenergy,naturalgas,biomassenergy,windenergy,geothermalenergy,oceanenergy,comprehensiveutilizationofresourcesforpowergenerationandothertypes.

Tarkoitus

Tämän päivän jaetut voimanlähteet viittaavat pääasiassa sisäpolttomoottoreihin (IC), jotka käyttävät nestemäistä kaasua, mikroturbiineja (mikroturbiineja) ja erilaisia ​​teknisiä polttokennoja (FuelCell), aurinkovoimaloita ja tuulivoimaloita. "ole pidempi sama käsite.

Yleinen malli

Hajautettu tasavirtalähde400 W;

800W;600W;laaja sovellusalue,

Suuri kustannustehokkuus

Merkitys

Hajautetussa energiassa voidaan käyttää maakaasua, hiilipetimetaania ja muita polttoaineita, samoin kuin hukkaresursseja, kuten biokaasua, koksikaasua, ja tuulienergiaa, aurinkoenergiaa ja vettä. Jaettujen energialähteiden polttoaine on enimmäkseen luonnonkaasua ja dieseliä. Hajautetun energian kehittämisen tärkeydellä on erityisesti seuraavat näkökohdat:

(1)Talous

BecausethewasteheatofdistributedenergycanbeusedtogenerateelectricityHeatingandcooling,soenergycanbeusedinareasonablecascade,whichcanimprovetheefficiencyofenergyuse(upto70%-90%).Duetotheintegrationofdistributedpowersources,large-scalepowerplantsandhigh-voltagetransmissiongridshavebeenreducedorpostponed,andtheconstructionofpowergridshasbeenpostponedtosaveinvestment.Atthesametime,thepowerflowofthetransmissionanddistributionnetworkisreduced,andthenetworklossiscorrespondinglyreduced.

(2)Ympäristönsuojelu

Becauseitusesnaturalgasasfuelorhydrogen,solarenergy,andwindenergyasenergysources,itcanreducethetotalemissionsofharmfulsubstances.Reducethepressureonenvironmentalprotection:Alargeamountofnearbypowersupplyreducestheconstructionoflarge-capacityandlong-distancehigh-voltagetransmissionlines,whichnotonlyreducestheelectromagneticpollutionofhigh-voltagetransmissionlines,butalsoreducesthelandacquisitionareaandlinecorridorsofhigh-voltagetransmissionlines.Thefellingoftreesunderthelineisconducivetoenvironmentalprotection.

(3)Energiankäytön monimuotoisuus

Distributedpowergenerationcanuseavarietyofenergysources,suchascleanenergy(naturalgas)andnewenergy(hydrogen)Andrenewableenergy(windenergyandsolarenergy,etc.),andprovideuserswithmultipleenergyapplicationssuchascold,heat,andelectricityatthesametime,soitisagoodwaytosolvetheenergycrisis,improveenergyefficiencyandenergysecurity.

(4)Huipputehoste

Summerandwinterareoftenthepeakperiodsofload.Atthistime,suchastheuseofnaturalgasasfuelgasturbinesandothercold,Thecombinedheatandpowersystemcannotonlysolvethecoolingandheatingneedsinwinterandsummer,butalsoprovidepartoftheelectricity,whichcanreducethepeakandfillthevalley.Inaddition,italsopartiallysolvedtheproblemofexcessivepeak-to-valleydifferenceinnaturalgassupply,andplayedacomplementaryroleinnaturalgasandelectricity.

(5)Turvallisuus ja luotettavuus

Whenalarge-scaleblackoutoccursinalargepowergrid,aspeciallydesigneddistributedpowergenerationsystemcanstillmaintainNormaloperation,whichcanimprovethesafetyandreliabilityofpowersupply.

(6)Powermarketissues

Distributedpowergenerationcanadapttotheneedsofpowermarketdevelopment.Multiplefundsareusedtogeneratepower,andthepowerconstructionmarketcanbefullyutilized.Thecompetitionmechanismoftheelectricitysupplymarket.

(7)Sijoitusriski

Theinstalledcapacityofdistributedpowergenerationisgenerallysmallandtheconstructionperiodisshort,soitcanbeavoidedSimilartotheinvestmentrisksbroughtbytheconstructioncycleoflargepowerstations.

(8)Virtasyöttöongelmat etäalueilla

ManyremoteandruralareasThegridsuppliespowertoit.Anindependentpowergenerationsystemusingsolarphotovoltaicpowergeneration,windpowergenerationandbiomasspowergenerationisapreferredmethod.