Ifektri yezilayi yaseBangladesh iyalivavanya igcini lebhetri yelithium lokumelana nomthwalo obalulekileyo we-300 kW, iiyure ezintathu zokuxhasa, kunye nokutshaja ngokuthe ngqo ilanga. Le ndawo ine-transformer ye-11 kV/415 V, 630 kVA kunye nejeneretha yedizili. Ikhowuteshini yangoku isekelwe kwiiyunithi ezine ze-241 kWh, okanye i-964 kWh yomthamo opheleleyo.
Umbuzo obalulekileyo ngulo, ingaba ibhetri yodwa ekufuneka igcine i-300 kW iiyure ezintathu, okanye ingaba amandla elanga nejeneretha nazo zinokuba negalelo. Loo ndawo yomda itshintsha umthamo, ulawulo, uvavanyo lokwamkelwa kunye nexabiso.
Impendulo ekhawulezayo
- Umthwalo obalulekileyo ufuna I-900 kWh isisiwe kwibhasi ye-AC: 300 kW × 3 hours.
- A Ibhetri enophawu lwe-964 kWh ayithethi ngokuzenzekelayo ukuba yibhetri yeeyure ezintathu.. Imida yokukhutshwa ngokunzulu, iilahleko zoguqulo, izixhobo zokuncedisa, isipaji kunye nokuguga konke kunciphisa amandla anokuhanjiswa.
- Under a preliminary screen—90% operating window, 94% discharge efficiency and 3% auxiliary allowance—964 kWh delivers approximately 791 kWh, okanye Iiyure ezi-2.64 kwi-300 kW.
- I-KRL 500 kW / 1 MWh all-in-one system is a strong power match and can anchor the grid–solar–diesel microgrid. Under the same screen, however, 1 MWh provides about 821 kWh, okanye Iiyure eziyi-2.74, ibhetri kuphela.
- Isisombululo esikhethiweyo ke ngoko yi-KRL. Inkqubo ehlanganisiweyo ye-500 kW/1 MWh, ngenkxaso yelanga ethe ngqo nedizili ezenzekelayo, igcina ixesha elipheleleyo lokusebenza leeyure ezintathu.
Isithembiso sorhwebo esichanekileyo ke ngoko sixhomekeke kwimpendulo enye ebhaliweyo: Ukuzimela ngebhetri kuphela, okanye ukuzimela kwenkqubo edityanisiweyo?
Iinyaniso zeprojekthi nemida yoyilo
| Into | Ulwazi lomthengi | Imisebenzi yobunjineli |
|---|---|---|
| Iziko | Ifektri yamalaphu, malunga ne-42,000 sq ft | Indawo yophahla ayifani nendawo ye-PV enokusetyenziswa; kufuneka uphando lwesakhiwo nolwethunzi. |
| Umthwalo obalulekileyo | 300 kW | Qinisekisa umyinge, incopho, umthwalo onyukayo, ukuqaliswa kweemoto kunye ne-power factor kwi-data elinganisiweyo. |
| Ixesha lokugcina ikopi | iiyure ezi-3 zokusebenza ngokwenene | Imiqathango yokwamkelwa kufuneka icacise ukuba i-PV nedizili zingaba negalelo na. |
| Ithemplowaya ekhoyo | 630 kVA, 11 kV/415 V | Qinisekisa i-kVA eseleyo, i-impedance, iqela le-vector, isilinganiselo se-LV bus kunye nenqanaba lephutha |
| Ugcino-lwazi olukhoyo | Ijenereyitha yedizili | Fumana i-nameplate, ulayisho oluncinci, i-controller, i-breaker kunye nedatha yokulungelelanisa. |
| Itekhnoloji yebhetri | Kufuneka iLithium | Chaza ukhuseleko, iwaranti yamandla asetyenziswayo, ulawulo lobushushu kunye novavanyo lokuqalisa ukusebenza. |
| Imfuneko yelanga | Ukutshaja ngokuthe ngqo ilanga kunye nesisombululo esipheleleyo se-PV | Route PV strings to the KRL system’s integrated MPPT; no separate PV inverter is required for this DC-coupled concept |
Umthengi kufuneka ahlale engaziwa esidlangalaleni ngaphandle kwemvume ebhaliweyo. La ngamaqikelelo okuyila kwangaphambili, hayi umzobo wokugqibela we-EPC okanye iwaranti.
Qala ngamandla ahanjisiweyo, hayi umthamo wekatalogu.
Inkonzo eceliweyo yi-300 kW iiyure ezintathu:
Required AC energy = 300 kW × 3 h = 900 kWh
Umthamo we-nameplate awunakuthelekiswa ngqo nomthwalo we-900 kWh. Thatha ingqalelo ifestile evumelekileyo ye-state-of-charge, ilahleko yoguqulo kunye nezixhobo zokuncedisa.
Kwisikrini sokuqala:
Deliverable AC energy = nameplate kWh × 0.90 × 0.94 × 0.97
| Uqwalaselo | Amandla ephaneli yegama | Amandla e-AC ahluziweyo | Ixesha lokusebenza kwi-300 kW |
|---|---|---|---|
| Iiyunithi ezine ze-241 kWh | 964 kWh | ≈791 kWh | ≈2.64 h |
| Ibhulokhi yamandla esemgangathweni ye-KRL | 1,000 kWh | ≈821 kWh | ≈2.74 h |
| Okwangoku, ubuncinane obusebenzisa ibhetri kuphela | ≈1,097 kWh | Ngenxa yokuba i-kWh ingumlinganiselo wamandla (amandla okufudumeza), i-900 kWh ilingana nokufudumeza indlu e | Iiyure ezintathu |
La mazibonelelo ziingqikelelo zocwangciso, hayi amaxabiso aqinisekisiweyo. Ubungakanani bokugqibela kufuneka busebenzise amandla asebenzisekayo aqinisekisiweyo, ukusebenza kakuhle kwe-PCS, iqondo lobushushu lasekhusini, izixhobo zokuncedisa, ukonakala kunye nesibhambathiso sokuphelelwa lixesha lokusebenza.
Isisombululo esicetyiswayo yile Ukomelela okuxubekileyo kweeyure ezintathu: sebenzisa inkqubo ye-KRL 500 kW/1 MWh enenkxaso yamandla elanga ngqo kunye nejeneretha ezenzekelayo. Ukuba umthengi kamva utshintsha i-criterion yokwamkelwa aye kukuzenimela ngebhetri kuphela, umthamo wamandla kufuneka ubale kwakhona kwaye wonyuswe.
Jonga amandla ngokwahlukileyo kumandla.
I-500 kW ye-PCS iyagqitha umthwalo oqhubekayo ochanngqiweyo we-300 kW, kodwa ukuqaliswa kwemoto kunye neenguqulelo zexeshana zenkqubo zisafuna ukuqinisekiswa.
Dwelisa yonke imoto ekhuselekileyo, indlela yokuqalisa, umsinga wokuqalisa, ukuhla kwe-voltage okuvumelekileyo kunye nolandelelwano lokuqalisa kwakhona. Ukuqalisa kwakhona okwenziwa ngokwamanqanaba kunokunciphisa amandla angummomentu.
At 415 V, the 630 kVA transformer is about 876 A full-load. A 300 kW load at 0.95 power factor is roughly 439 A; a 500 kW PCS at unity power factor could approach 696 A at full output. The EMS must limit charging against live factory demand. “Reserved capacity” does not replace interval data and protection calculations.
Isakhiwo se-KRL hybrid esicetyiswayo
Lo mxholo usebenzisa ibhasi enye ye-microgrid engama-415 V elawulwayo:
- Umbane we-11 kV unika amandla kwi-transformer esele ikhona, uze emva koko unike i-main board ye-415 V kunye ne-bus eyahlulweyo yomthwalo obaluleke kakhulu.
- PV strings connect directly to the KRL system’s integrated 480 kW MPPT, ehlelwe kwizindlela ezine ze-MPPT. Le yindlela efunwayo yokutshaja ngqo elangeni; i-inverter ye-PV yangaphandle ayifakwanga kulo mbono.
- I-KRL 500 kW PCS Iqhagamshela macala omabini kwi-bus ye-415 V kwaye ilawula ukutshaja, ukukhupha umbane, ukusebenza xa uqhagamshelwe kwinethiwekhi kunye nenkxaso yokusebenza ngaphandle kwayo.
- Ijenereyitha yedizili ihlala ingumthombo owahlukileyo wogama-AC, isebenzisa i-breaker yayo kunye ne-ATS eyilweyo okanye ujongano lokulungelelanisa.
- I-EMS ilungelelanisa ukungeniswa kwegridi, uphambili lwe-PV, imeko yokutshaja kwebhetri, ukuqala nokumisa ijeneretha, imida yokungenisa yetransfoma kunye nokucinywa kombane.
Iqonga le-KRL lidibanisa ibhetri yelithium eyi-1 MWh, i-PCS eyi-500 kW, i-MPPT iyonke eyi-480 kW enezindlela ezine, ulawulo lwe-BMS/PCS/EMS, ukupholisa okwenzeka ngokutshiza ulwelo, ikhabhathi yebhetri ene-IP65 kunye nonxibelelwano lwe-RS485/Wi-Fi/4G kwikhonteyina eneenyawo ezingama-20. Ixhasa ukusebenza kwi-on-grid nakwi-off-grid ngotshintsho olungenamagingxi. Ukukhetha kokugqibela kuxhomekeke kwidayagramu yemigca-enye evunyiweyo kunye nophononongo lwendawo.
Indlela inkqubo ekufuneka isebenze ngayo
Ukusebenza kwegrid okuqhelekileyo. Ilanga lihambisa umthwalo kwaye litshaje ibhetri ngaphakathi komda wetransformer. I-EMS igcina isipaji sokuzimela esivunyelweneyo.
Ukuphazamiseka kokukhanya kwemini. I-PCS ixhasa ibhasi ebalulekileyo ngelixa i-PV iqhubeka isebenza nge-MPPT edityanisiweyo. Amandla angaphezulu avela kwi-PV atshaja ibhetri; ibhetri igcwalisa ukunqongophala kwamandla e-PV.
Amandla elanga aphantsi okanye isimo sokutshaja aphantsi. I-EMS iqalisa ijenereyitha phambi kokuba ugcino olongezelelweyo luphele, ngelixa ihlonipha uluhlu lwayo oluzinzileyo lomthwalo.
Ukubuya kwegrid. Iilawuli ziqinisekisa iimeko zombane, zitshintshe okanye ziphinde zihambelane phantsi kwesicwangciso esivunyiweyo, zize zinyuse ireyithi yokutshaja ngaphandle kokudala incopho entsha.
Isicwangciso samandla elanga kwifektri enobukhulu obuyi-42,000 sq ft
The gross building area is about 3,902 m², but usable PV area is reduced by structure, shading, drainage, skylights, fire setbacks and access lanes.
I-KRL inokuhlola i-array ye-PV ye-DC ethe ngqo kwi- 350–480 kWp range. Ubungakanani bokugqibela buxhomekeke kuphicotho-zinyuko lophahla, uyilo lwemodyuli/lomtya, iqondo lobushushu kunye nemida ye-480 kW ye-MPPT. Ukuveliswa kombane, ixesha lokuphinda kugcwaliswe kunye nokuthunyelwa kombane kwigridi zifuna idatha yendawo kunye nendlela yangoku yokufumana imvume yombane yaseBangladesh/i-SREDA.
Isizathu soshishino: linganisa imisinga emine yexabiso
Isiphakamiso kufuneka sinike iinkcukacha ezilinganisiweyo kunokuba sicinge nje:
- ukuphepha ilahleko kwimveliso ngexesha lokunqamka kombane kunye nokuphazamiseka kwamanqanaba ombane;
- idizili, ulungiso neeyure zokusebenza zomthwalo ophantsi ezithathelwe indawo yimandla elanga neebhetri;
- Ukusetyenziswa kwamandla elanga ngokwakho kunye nokuncitshiswa kokuthengwa kwamandla kumbane womrabe;
- demand-charge or time-of-use savings, if those mechanisms apply to the customer’s tariff.
Use 12 months of bills, interval load data, outage history, generator fuel/run hours, diesel price, production losses, roof results and the customer’s financial horizon.
Ukhuseleko, iimvume kunye novavanyo lokwamkelwa
Qinisekisa iimfuno kunye nabeziko lolawulo lwasekhaya, ababoneleli ngeenkonzo, umqeski-mali kunye ne-EPC. Izalathiso zamazwe ngamazwe ezifanelekileyo ziquka i-IEC 62619, i-IEC 63056 kunye ne-IEC 62933-5-2.
Phambi kokunikezelwa, kuvavanywe ukhuseleko, ukumisa kwexeshana kaxakeka, indlela yokuziphatha xa unxibelelwano luphazamisekile, utshintsho, ulawulo lwejenereta, ukuncitshiswa kwamandla e-PV, ukucinywa kombane kunye nokuzimela. Rekhoda imeko yokuqala yotshaja, umthwalo, igalelo elivumelekileyo, iimeko zangaphandle kunye nomda wokuphumelela/wokungaphumeleli.
Uluhlu lokujonga lwe-RFQ phambi kwesicatshulwa esisisigxina
Thumela olu lwazi lulandelayo kwi-KRL:
- Umzobo womgca omnye ukusuka kwisangxobo sama-11 kV ukuya kwibhasi ebalulekileyo yama-415 V.
- Ifoto yepleyiti yegama ye-transformer, i-impedance, iqela le-vector kunye nezicwangciso zokhuseleko.
- Umlinganiselo we-kVA/kW yejenereyitha, ivoltheji, imodeli yesilawuli, ibreka kunye nomthwalo omncinci ozinzileyo.
- Iinkcukacha zomthwalo wexesha elinqamlezayo zeentsuku ezisixhenxe, kunye noluhlu lomthwalo obalulekileyo lwe-300 kW kunye neenkcukacha zokuqalisa iimoto.
- Ingqinisekiso ebhaliweyo yokuzimela kweeyure ezintathu, nokuba yeyebhetri kuphela okanye yeyibridi.
- Iqinisekiso elifunekayo lamandla asebenzisekayo ekuqaleni nobupheleni bobomi.
- Ucwangciso lophahla, ingxelo yesakhiwo, izithintelo zokufihla elanga kunye neendlela zeekhebula ezikhoyo.
- Iqondo lobushushu lendawo, iinkcukacha zokuzikhusela kwizikhukula nokuhambisa amanzi, ukufikeleleka emlilweni kunye nendawo yokubeka izikhongozeli.
- Tarifa yeenkonzo, irekhodi lokunqamka kombane, ukusetyenziswa kwedizili kunye nesicwangciso-qhinga sokusebenza esijolisweyo.
- Imigangatho efunekayo, iimvume zasekuhlaleni, iimvavanyo zokuqalisa kunye neshedyuli yeprojekthi.
Isiphelo
The project should not be sold as “964 kWh equals three hours.” Its real requirement is 900 kWh delivered to a 300 kW AC load, and the initial energy screen shows a meaningful gap after normal operating limits and losses. The KRL 500 kW / 1 MWh all-in-one platform is a credible centrepiece for the requested solar–grid–diesel microgrid, especially when PV or the generator may support the outage window. If the customer requires three hours from the battery alone, KRL should size a larger energy block against a written usable-energy and end-of-life guarantee.
Review KRL’s Iinkqubo zokugcina amandla zorhwebo nezoshishino, phanda Izisombululo ze-C&I ESS, okanye Thumela idatha yeprojekthi kwi-KRL ngenxa yombono oqinisekisiweyo womgca omnye, ukubalwa komthamo kunye nesiphakamiso sorhwebo.
Imibuzo ebuzwa rhoqo
Imithombo
- Igunya loPhuhliso lwaMandla aZinzileyo navaNtshintshwayo (SREDA), Isikhokelo seNet Metering 2025: https://www.nshd.sreda.gov.bd/page?pid=15
- Icandelo laMandla laseBangladesh, Isicelo seMitha yoMbane yoBhaliso: https://nem.powerdivision.gov.bd/
- IEC 62619:2022, iiseli neebhetri ze-lithium zesibini zoshishino: https://webstore.iec.ch/en/publication/64073
- IEC 63056:2020, iiseli ze-lithium neebhetri zeenkqubo zokugcina amandla ombane: https://webstore.iec.ch/en/publication/29224
- IEC 62933-5-2:2025, iimfuno zokhuseleko kwiinkqubo ze-EES ze-electrochemical ezidityaniswe negridi: https://webstore.iec.ch/en/publication/68297