IBattery Round Trip Efficiency: AC vs DC RTE Guide

Ukusebenza kakuhle kwebhetri kuhambo olubuyayo (RTE) lelona nani linye liluncedo lokuqikelela ukuba angakanani amandla asetyenziswa yibhetri kwinkonzo. Ipakethe yebhetri ye-lithium-yanamhlanje ye-ion elinganiswa kwiitheminali ze-DC ihlala phakathi kwe-92% kunye ne-96%. Songa loo mpakethi kwinkqubo yoguqulo lwamandla (PCS), ulawulo lobushushu, ulawulo kunye nemithwalo elindileyo, kunye nenombolo yecala le AC{5}}amava omthengi adla ngokuba ngama-84% ukuya kuma-92%. I-Lead-iinkqubo zeasidi zihlala phantsi, malunga ne-70% ukuya kuma-85%. Ezo zikhewu zikhangeleka zincinci ephepheni, kodwa kulo lonke ixesha lokusebenza leentsuku ezingama-365 bathatha isigqibo sokuba ngaba iprojekthi ifike kwithagethi yayo yokuhlawula.

Esi sikhokelo sibandakanya ifomyula, uluhlu oluqhelekileyo lwe-RTE ngokwekhemistri, umahluko phakathi kwebhetri-inqanaba kunye nenkqubo{1}}amanani enqanaba, yintoni eneneni eqhuba ilahleko, kunye nemibuzo omawuyibuze phambi kokusayina umyalelo wokuthenga we-BESS.
 

Yintoni iBattery Round Trip Effective?

Uhambo olululo luyireyishini yamandla asebenzisekayo ibhetri ewahambisayo kumandla owafakayo ukuyihlawulisa, ebonakaliswa ngokwepesenti. Tshaja inkqubo ene-100 kWh, ufumane i-90 kWh umva, kwaye i-RTE yi-90%. Iilahleko zingena ekufudumeni okuxhathisayo kwiiseli kunye neebhasi, ilahleko yokuguqulwa kwi-PCS, kunye nemithwalo ye-parasitic efana nenkqubo yokulawula ibhetri (BMS), i-HVAC, abalandeli, abafowunelwa kunye ne-electronics standby.

Ukufumana, i-RTE ingaphezulu komdla wobugcisa. Iseta ngokuthe ngqo ukuba singakanani imveliso yelanga, off-incopho yamandla egridi okanye isibaso{2}}ixesha lejenereyitha elichithwayo kumjikelo ngamnye, kwaye itshintsha ubungakanani bebhetri oyifunayo ukuhlangabezana nethagethi yamandla enikiweyo. Isebe lezaMandla laseMelikaIOfisi yoMbanekunye neprothokholi yokusebenza yeSandia National Laboratories zombini ziphatha i-RTE njengeyona KPI yogcino olumileyo, ecaleni komthamo kunye nexesha lokuphendula.

Ifomula yoQeqesho oluLungileyo lwebhetri

Ifomula ilula:

Uhambo oluLungileyo oluLungileyo (%)=Amandla akhutshwayo ÷ Amandla aChajiwe × 100

Masithi isixokelelwano sekhabhathi yangaphandle ye-100 kWh ifunxa i-95 kWh kwigridi ngexesha lefestile ecinyiweyo yokutshaja kwaye ikhuphe i-85 kWh ngexesha langokuhlwa. Ukusebenza kokubuya nokubuya kwe-AC kulo mjikelo ngama-85 ÷ 95 × 100=89.5%. Yenza ubalo olufanayo kwimijikelo emininzi ukugudisa enye{{9}kususe ingxolo yomlinganiselo - Uvavanyo lomthetho kaSandia lucebisa ukuba kwenziwe i-avareji kwimijikelo emininzi kunye neemeko zokusebenza zenani elimele inombolo.

Into enye ifomyula ayibonisi: apho imitha iphi. Hambisa indawo yokulinganisa ukusuka kwiitheminali zeeseli ukuya kwi-AC switchboard kwaye ibhetri yenyama efanayo iya kuxela inani elahlukileyo. Kungenxa yoko le nto ii-database ezimbini ezicaphula "95% RTE" zinokuchaza iimveliso ezahlukeneyo kakhulu.
 

UFanelo oluQhelekileyo lokuHamba ngokuBuyisa ngohlobo lwebhetri

Amanani angezantsi abonisa uluhlu oluxeliweyo oluxhaphakileyo ukusuka kwiinkcukacha zedatha yomenzi, iingxelo zobugcisa ze-NREL kunye nemilinganiselo yendawo. Ziphathe njengepaki yebhola - eyona ntsebenzo ixhomekeke kuC{2}}kumlinganiselo, ubushushu, ifestile yeSOC kunye nomda wenkqubo.

• LiFePO4 (lithium iron phosphate):I-92% ukuya kwi-96% ye-DC RTE kwinqanaba lokupakisha; 86% ukuya kwi-92% AC RTE kwinqanaba lenkqubo. Eyona khemistri yogcino lwentengiso olumileyo kunye nolwemizi-mveliso.
• NMC lithium{0}}ion:92% ukuya 95% DC RTE. Ixhaphakile kwi-EV{3}}iimodyuli ezifunyenweyo kunye nezinye iisistim ze-C&I apho ukuxinana kwamandla kubaluleke ngaphezu kobomi bekhalenda.
• Lead-asidi (ikhukuliswe kunye neAGM):I-70% ukuya kwi-85% ye-DC RTE, ihla ngakumbi kumaqondo obushushu aphantsi okanye amanqanaba aphezulu okukhutshwa. Isasetyenziselwa umsebenzi omfutshane ogcinayo kodwa kunqabile ukuba lube lolona khetho lufanelekileyo lokukhwela ibhayisekile yonke imihla.
• Ukuhamba kweVanadium redox:65% ukuya 80% AC RTE. Ingaphantsi kune-lithium ngenxa yomthwalo wempompo yeparasitic kunye nemisinga ye-shunt, kodwa ubomi bomjikelo omde kunye nobunzulu-bo{4}}wokunyamezela ukukhupha.
• Isodium-iyoni:I-85% ukuya kwi-92% ye-DC RTE kwiiseli zorhwebo zangoku. Ukuthembisa ngexabiso-iiprojekthi ezinobuzaza kodwa ukusebenza kusayohluka ngokomvelisi.

Ukuba ulinganisa iikhemistri ngokuchasene neemeko ezithile zokusetyenziswa, ulwahlulo lwethu lweiintlobo ezahlukeneyo zebhetri yokugcina amandlaiya kurhwebo-lophulwe kwiinkcukacha ezithe vetshe.

Ibhetri-Inqanaba le-RTE vs DC RTE vs AC RTE vs Inkqubo ye-RTE

Apha kulapho iingxabano ezininzi zokuthenga ziqala khona. Amanani engxelo yeedathashethi alinganiswe kwimida emine eyahlukeneyo, kwaye umsantsa phakathi kwawo unqabile ukuba ube mncinci kuneepesenti ezi-4.

• Iseli-inqanaba le-RTE (94%–97%):Ilinganiswe kwiitheminali zeeseli enye phantsi kweemeko zelebhu ezilawulwayo. Iluncedo kuthelekiso lwekhemistri, hayi ubungakanani benkqubo.
• Ipakethi/DC RTE (92%–96%):Ilinganiswe kwibhasi ye-DC yepakethi edibeneyo, kuquka ilahleko ye-BMS kodwa ingabandakanyi i-PCS. Eli lelona nani lininzi labathengisi bepakethi ye-lithium bacaphula.
• I-AC RTE (86%–92%):Iquka i-AC-ukuya{1}}ukuguqulwa kwe-DC ngexesha lokutshaja kunye ne-DC-ukuya{3}}uguqulo lwe-AC ngexesha lokukhupha nge-PCS. Inani ngasemva{5}}kwi{6}}yemitha abathengi abanamava ngokwenene.
• Inkqubo-egcweleyo RTE (82%–90%):Yongeza i-HVAC, ulawulo, iziguquli, amandla ancedisayo kunye nokusetyenziswa kokulinda. Inombolo echanekileyo yoqoqosho lweprojekthi kunye nemodeli yesivuno.

Ukuthengwa, i-AC okanye epheleleyo-inkqubo ye-RTE iphantse yahlala ifanelekile kunomgangatho weseli{1}}ubuchule bokusebenza, kuba ibonisa ukuhanjiswa kwamandla asebenzisekayo kwindawo yengeniso okanye yokonga. Ukuthelekisa iseli yomthengisi -inqanaba lama-96% ukuya komnye umthengisi ngokupheleleyo{5}}inkqubo 87% ayingomlo olungileyo - kwaye iyenzeka rhoqo. Indima inverter kule gap inkulu ngokwaneleyo ukuba ukuqondainkqubo yokuguqula amandla (PCS)ixabisa ufundo olwahlukileyo.
 

Kutheni uHambo oluLungileyo oluLungileyo aluzange lube yi-100%

Uguqulo ngalunye kunye nokuhamba konke kwangoku ngokusebenzisa imathiriyeli yokwenyani kubiza amandla. Iibhakethi zelahleko eziphambili zezi:

Ukuchasana kwangaphakathi kunye nokufudumala kwejoule.Ngoku ngeeseli, iibhasi, iifuse, abafowunelwa kunye neentambo zivelisa ilahleko ye-I²R njengobushushu. Yiyo loo nto iphezulu-C{2}}isantya sokusebenza sinciphisa ukusebenza kakuhle: ukuphinda kabini ii-quadruple zangoku ilahleko exhathisayo yamandla afanayo asusiweyo.

Ilahleko ye-Electrochemical.ILithium-impendulo ze-ion zibuyela umva kodwa azikho ngokugqibeleleyo. Iqhekeza elincinci lamandla lilahlekile kwi-overpotentials, ukuphendula kwecala kunye nobushushu obuncinci kumjikelo ngamnye.

PCS ukuguqulwa ilahleko.I-PCS yomtya yanamhlanje ibaleka malunga ne-97% -98.5% ngokufanelekileyo kumthwalo olinganisiweyo kodwa yehla ngokubonakalayo kumthwalo ophantsi kancinci - ngamanye amaxesha ngaphantsi kwe-92% kwi-10% yokulayisha. Ukuguqulwa kabini kumjikelo ngamnye (intlawulo kunye nokukhutshwa) kudibanisa ilahleko.

I-BMS kunye nemithwalo ye-parasitic.Ukulungelelanisa iiseli, unxibelelwano, abafowunelwa, iifeni zokupholisa kunye ne-elektroniki yokulinda kudla amandla ngokuqhubekayo. Kwizicelo zogcino ezinebhayisikile encinci, imithwalo yeparasite inokunciphisa isiqingatha ukusebenza okubonakalayo kwinyanga yokuhlawula.

Ulawulo lobushushu.Ukupholisa umoya okanye ukupholisa ulwelo kutsala amandla okwenene. Kwimozulu eshushu isixokelelwano somthwalo weHVAC singajiwuzisa inkqubo ye-RTE ngepesenti ezi-2–4 zamanqaku ngamaxesha onyaka. Ukhetho lweinkqubo yokupholisa ye-BESSibumba ngqo eli nani.

Imiba ePhambili echaphazela uHambo oluLungileyo oluLungileyo

I-RTE asiyopropathi esisigxina yebhetri. Ihamba kunye neemeko zokusebenza, ngamanye amaxesha ngaphezu kweepesenti ze-5.

C-umlinganiselo

Uninzi lwedatha yedatha ye-lithium icaphula i-RTE kwi-0.5C okanye i-0.25C. Kwi-1C ipakethi efanayo ngokuqhelekileyo ilahlekelwa ngamanqaku angama-1-3; kwi-2C, ngaphezulu. Ukuba inombolo yentloko yomthengisi ibilinganiswe ku-0.2C kodwa iprojekthi yakho iye yajikela ku-1C yokutsheva okuphezulu, lindela okuphantsi kokwenyani{10}}kwehlabathi kokusebenza kakuhle kunencwadana.

Ubushushu

Ukushisa okubandayo kwandisa ngokukhawuleza ukuchasana kwangaphakathi. Ipakethe ye-LiFePO4 ehambisa i-94% ye-DC RTE kwi-25℃ingahla ngaphantsi kwe-88% kwi-0 degree, kunye ne-lithium - ukutshaja kwe-ion ngokuqhelekileyo kuthintelwe ngaphantsi kwe-0℃ukuphepha i-lithium plating. Amaqondo obushushu aphezulu anceda uhambo lokuya nokubuya{9}}uhambo olufanelekileyo ngexesha elifutshane kodwa lukhawulezisa ukuguga kwekhalenda kwaye lunyanzelise i-HVAC ukuba isebenze nzima. Okucetyiswayouluhlu lobushushu bebhetri ye-lithiumkufanelekile ukukhangela ngokuchasene nemekobume yakho yofakelo phambi kokulinganisa ulawulo lobushushu.

Ubunzulu bokukhutshwa kunye nefestile ye-SOC

Ukusebenza phakathi kwe-10% -90% ye-SOC isebenza kakuhle kakhulu kunokutyhala ukuya kwi-0% -100%, kuba isiphelo-se{5}}yentlawulo kunye nesiphelo-sokukhupha{7}}imimandla inokugqithiswa okuphezulu. Iinkqubo ezininzi zorhwebo zifektri{9}}ziqwalaselwe ukuba zibe mxinwa kancinane ifestile ngesi sizathu - kunye nokwandisa ubomi bomjikelo.

Uyilo lwenkqubo

I-DC{0}}i-solar edityanisiweyo{1}}kunye-nogcino lugcina uguqulo lwesiguquli esinye kumjikelo ngamnye xa ugcina umbane welanga, kaninzi uzuza i-1-3 yamanqaku okusebenza ngokufanelekileyo ngokuchasene ne-AC{5} ngokudibeneyo. Uyilo oludityanisiweyo lwe-AC{7} luphumelela kubulula be-retrofit kunye nokuguquguquka kwezixhobo. Akukho nto ilunge ngakumbi kwihlabathi liphela; ukhetho oluchanekileyo luxhomekeke ekubeni uyakha entsha okanye ukubuyisela kwakhona. Uthelekiso lwethu lweAC{0}idityanisiwe vs -idityanisiwe yogcino lwebhetriibandakanya urhwebo{0}}loluhlu ngokweenkcukacha.

Iprofayile yomthwalo oncedisayo

I-BESS epheleleyo ibandakanya ngaphezu kweebhetri. Ukusebenzisana phakathi kweeseli, i-BMS, i-PCS, i-EMS, i-HVAC kunye nezixhobo zokukhusela zichaza inkqubo esebenzayo oyifumanayo. Isakhelo esiluncedo apha kukucazululwa kweamacandelo enkqubo ye-BESS engundoqokunye nokuba ngalinye linegalelo njani okanye linciphisa i-RTE.

Yintoni uHambo oluLungileyo oluLungileyo oluLungileyo lweBattery?

Impendulo esebenzayo yabathengi ngo-2026:

• Ngaphezulu kwe-90% yenkqubo ye-AC ye-RTE:Igqwesileyo kurhwebo olupheleleyo okanye oluluncedo lwe-BESS. Iyafezekiswa ngeLiFePO4 yangoku kunye -nomtya ophezulu wobuchule okanye iPCS esembindini.
• 86%–90% inkqubo ye-AC ye-RTE:Eqhelekileyo kwiinkqubo-ezenziwe kakuhle ze-C&I. Yamkelekile kwiiprojekthi ezininzi zokutsheva kunye nokutshintsha umthwalo.
• 82%–{1}}% inkqubo ye-AC RTE:Yamkelekile kugcino okanye usetyenziso lwebhayisikile encinci, kodwa mhlawumbi iqhuba ngaphantsi kuqoqosho lwemihla ngemihla lokuhamba ngebhayisikile.
• Ngaphantsi kwe-82% inkqubo ye-AC ye-RTE:Phanda. Nokuba inkqubo ayihambelani nomjikelo wayo womsebenzi, igqithiselwe kumthwalo, okanye inombolo yedatha yedatha ibinobubele.

Ukuba umthengisi ubanga i-95% AC RTE kwi-turnkey system, cela ingxelo yovavanyo. Elo nani liyafikeleleka kwinqanaba lepakethi ye-DC, kodwa ayiqhelekanga kumda wenkqubo ye-AC xa i-HVAC kunye nokulinda zibandakanyiwe.

Indlela uHambo oluLungileyo oluLuchaphazela ngayo uQoqosho lweProjekthi

Incopho yorhwebo yokutsheva kunye neentlawulo zemfuno

Kwisiza sorhwebo sase-US esihlawula i-$20/kW kwiintlawulo zemfuno yenyanga, inkqubo ye-500 kWh yokucheba i-100 kW yencopho inqanda malunga ne-24,000 yeedola ngonyaka kwiindleko zemfuno kuphela. Ukuba i-RTE yehla ukusuka kwi-90% ukuya kwi-85%, mhlawumbi ulahlekelwe yi-5% yamandla akhoyo ukuze uchebe loo ncopho okanye kufuneka ungenise amandla egridi amaninzi ukuze wenze oko. Kubo bonke ubomi besixhobo, laa manqaku ama-5 adibana abe yinto{13}}engeyonto encinci ye-IRR yeprojekthi. Umfanekiso opheleleyo weindlela ukugcinwa kwamandla orhwebo kugcina imali yamashishiniihamba kakuhle ngaphaya kwe-RTE, kodwa i-RTE isiphindaphinda kuyo yonke enye ingeniso.

ISolar self{0}}ukuzisebenzisa

Indawo yokuhlala okanye isixokelelwano selanga esincinci sorhwebo esigcina i-15 kWh yentsalela yemihla ngemihla izivuno eziyi-13.8 kWh kuma-92% e-RTE xa kuthelekiswa ne-12.3 kWh kuma-82% e-RTE. Ngaphezulu kweentsuku ezingama-300 zokukhwela ibhayisekile ezingama-450 kWh zamandla elanga asetyenziswayo ngonyaka - ngokuqhelekileyo i-$90 ukuya kwi-$200 yokungeniswa ngaphandle kwegridi ethintelwayo ngokuxhomekeke kumaxabiso asekuhlaleni.

Vala-igridi kunye neenkqubo zemicrogrid

Kwi-off-ulungelelwaniso lwegrid, ikWh nganye-yelahleko yohambo lokuya nokubuya kufuneka endaweni yayo kufakwe enye iPV, ngaphezulu kwexesha ledizili, okanye umthamo webhetri ongaphezulu. I-RTE idibanisa neentsuku zokuzimela ngendlela eyenza ukuba -iibhetri ezisebenzayo zingabizi kakhulu ekuboneleleni. Kwimishini-yesayithi ezibalulekileyo le ikwangumba wokuthembeka, hayi nje uqoqosho.Izisombululo ze-BESS zorhwebo nezoshishinokwezi zicelo zidla ngokuchazwa kwinqanaba lenkqubo ye-AC ngenxa yesi sizathu kanye.

Amanqaku ommandla: Iingqwalasela ze-RTE ezisebenzayo

Iipateni ezimbalwa ezifanele ukufolwa ukusuka kwi-BESS yokwenyani yokuthunyelwa:

Ukukhanya-iisistim zogcino lwemisebenzi zihlala zingasebenzi ngaphantsi kwedatha yazo.Ikhabhinethi ye-500 kWh ejikeleza kuphela ngexesha lokucima ichitha ama-99% obomi bayo kwindawo yokulinda. Ukusetyenziswa okulindileyo nokuba ngama-200 W ngokuqhubekayo yi-1,750 kWh/ngonyaka - iqhezu elinentsingiselo lesiphumo siphelele. I-RTE ecatshulweyo ithatha ibhayisekile esebenzayo kwaye phantse ayikhe ibonise oku.

Imozulu eshushu ikhukulisa i-RTE ngamaxesha athile onyaka.Ukupholisa umthwalo kwisixokelelwano esifakwe kwisingxobo esikwiqondo le-40 kwindawo engqonge ihlobo unokutsala umyinge we-3–5% ye-output, ngokuxhomekeke kwi-insulation kunye nobukhulu be-HVAC. Inkqubo efanayo kwimozulu ye-20℃iyakugqwesa amawele ayo ashushu -yemozulu ngaphandle kotshintsho kwiiseli.

Ngokungaphelelanga -ukusebenza kakuhle komthwalo kubaluleke ngaphezu kobuchule obuphezulu.I-PCS ebekwe kwincopho ye-98.5% inokuhlala kuma-93% ngexesha lemisila emide yemfuno yokwenyani{2}}yokucheba ijika. Ukuba umjikelo wakho womsebenzi uchitha ixesha elininzi kumandla aphantsi, linganisela uvavanyo lwakho ngokufanelekileyo.

I-RTE ithoba isidima.Ipakethe i-RTE idla ngokuwisa amanqaku e-1-2 kwimijikelo engamawaka ambalwa okuqala njengoko ukukhula kwangaphakathi kukhula. Abanye abathengisi bacaphula isiqalo{3}} {4} samanani obomi ngaphandle kokuphawula oku.

Isishwankathelo

Ukusebenza kwebhetri ukuya nokubuya yinombolo elula ekhohlisayo. Kubonakala ngathi umfanekiso omnye kwi-database, kodwa ekusebenzeni yintsapho yamanani alinganiswa kwimida eyahlukeneyo, kwiimeko ezahlukeneyo zokusebenza, kunye nokufakwa okuhlukeneyo kwimithwalo encedisayo. Ukufumana izigqibo zokuthenga ngokwenene, i-AC okanye inkqubo epheleleyo ye-RTE - elinganiswa kwiimeko zokusebenza ezimele kuphela isiseko esinyanisekileyo sokuthelekisa, kwaye 86% -92% luluhlu oluyinyani lwe-lithium eyilwe kakuhle{6}}i-ion BESS ngo-2026.

Phambi kokuzibophelela kwisistim, nyanzelela bonke abathengisi ukuba bacaphule kumda omnye, ufumane iimeko zovavanyo ngokubhaliweyo, kunye noxinzelelo{0}}vavanya inani ngokuchasene nomjikelo wakho womsebenzi, imozulu kunye neprofayile yomthwalo. Ixabiso ledatha engenakukwazi ukusinda kule mibuzo akunakwenzeka ukuba liphile nakwiprojekthi.