1. Load suav cov qauv:
1.1 Kev kwv yees kev thauj khoom tuaj yeem ua raws li cov chaw nres tsheb fais fab thaum lub sijhawm tsim qauv; Thaum lub sij hawm tsim ua ntej thiab kev tsim qauv kos duab tsim, cov txheej txheem coefficient yuav tsum tau siv rau kev xam cov load.
1.2 Lub peev xwm ntawm lub transformer yuav tsum tau txiav txim siab thaum them cov chaw nres tsheb hauv cov chaw nres tsheb uas twb muaj lawm. Lub transformer load tus nqi thaum lub sij hawm ncov yuav tsum tsis txhob ntau tshaj 100% thaum ib tug busbar thaiv yog siv, thiab yuav tsum tsis txhob ntau tshaj 60% thaum ib tug busbar segmented thaiv yog siv.
1.3 Thaum lub overload ntawm lub transformer tis yog tshwm sim los ntawm kev nkag mus rau cov chaw them nyiaj, cov txheej txheem yuav tsum tau txais kev pom zoo los txhim kho nws. Nws raug nquahu kom muab qhov tseem ceeb rau kev ua kom zoo ntawm kev tswj xyuas lub zog thiab lub sijhawm them nyiaj. Yog tias tsim nyog, lub peev xwm ntawm cov chaw faib khoom yuav tsum tau nce thiab hloov pauv. Thaum nce lub peev xwm, nws yuav tsum tau ua ke nrog kev txhim kho ntawm cov khoom nyob ib puag ncig thiab tawm ntawm cov npoo tsim nyog.
1.4 Lub ntsiab lus ntawm 100% kev tsim kho ntawm cov chaw them nqi lossis cov kev tsim kho tshwj xeeb thiab kev teeb tsa rau cov chaw nres tsheb hauv cov tsev tsim kho tshiab:
a) Nws raug nquahu kom teeb tsa lub chaw tsim khoom tshwj xeeb cais, nrog 20% kev teeb tsa nyob rau lub sijhawm ze thiab 45% kev teeb tsa hauv lub sijhawm ntev kom khaws cov khoom siv hluav taws xob siab thiab qis qis, transformers thiab lwm qhov chaw, thiab tsim nyob rau theem (piv txwv li, lub substation yog configured nrog civil engineering tej yam kev mob ntawm 45% thiab tag nrho cov tsim yog ntsia ntawm 20%).
b) Muaj peb hom kev faib khoom hauv cheeb tsam, lub thawv xa khoom thiab cov raj xa dej: ① Txhua tus qauv tsim tau teeb tsa ntawm 100%; ② Tag nrho cov qauv tsim tau nruab rau ntawm 20% (chaw faib khoom hauv cheeb tsam-kawg faib lub thawv-them pawg), thiab lwm yam 80% tsuas yog txiav txim siab routing, civil engineering thiab lwm yam kev mob; ③ Tsuas yog lub regional faib txee yog tsim thiab ntsia ntawm 20%, lub davhlau ya nyob twg tis lub thawv raug tshem tawm, thiab lub regional faib txee ncaj qha muab lub hwj chim rau lub them pawg, thiab lwm yam 80% tsuas yog xav txog routing, civil engineering thiab lwm yam kev mob.
2. Kev suav ntawm lub peev xwm ntawm lub siab hloov pauv rau cov chaw them nyiaj:
SΣ=KtKxCn(KnPn+KmPm)/(ηcosΦ)
SΣ: Tag nrho cov muaj peev xwm ntawm lub transformer (kVA)
η: Transformer load rate, coj 0.7-0.75
cosΦ: Lub zog ua haujlwm tom qab them nyiaj, noj 0.95
Pn: AC them pawg (them them qeeb) ntsia lub zog 7kW; (ceev them ceev) ntsia lub zog 40kW;
Pm: DC them pawg (them them ceev) ntsia lub zog, (feem ntau 60kW, 120kW)
Kn: Tus naj npawb ntawm cov chaw nres tsheb qeeb (piv txwv li, tus naj npawb ntawm qhov chaw nres tsheb qeeb qeeb / tus naj npawb ntawm qhov chaw nres tsheb tau npaj hauv zej zog) yog 0.2 nyob rau lub sijhawm luv thiab { {4}}.45 nyob rau hauv lub sij hawm ntev
Km: Cov coefficient ntawm cov chaw nres tsheb ceev ceev (xws li, tus naj npawb ntawm cov chaw nres tsheb ceev ceev / tus naj npawb ntawm cov chaw nres tsheb hauv zej zog) yog 0.02 hauv lub sij hawm luv luv thiab 0.045 nyob rau hauv lub sij hawm ntev
Kx: Kev them nqi ntawm pawg coefficient, tus naj npawb ntawm cov pawg them nyiaj (slow charging + fast charging), 0.75-0.85 rau 5-10; 0 55-0.65 rau 10-50; 0 4-0.45 rau ntau tshaj 50
Kt: Kev them nyiaj ib txhij siv coefficient, tus naj npawb ntawm cov pawg them nyiaj (slow charging + fast charging), 0.85-0.9 rau 5-50; 0 6-0.7 rau ntau tshaj 50
Cn: Tus naj npawb ntawm cov chaw nres tsheb tau npaj hauv zej zog
Kev xaiv ntawm Kt thiab Kx feem ntau cuam tshuam nrog cov hauv qab no:
2.1 Kev siv hluav taws xob tsheb: Tam sim no, tag nrho cov tsheb hluav taws xob tsawg tsawg, thiab kev siv tus nqi ntawm cov khoom siv them nws tus kheej tsis siab; cov xwm txheej tshwj xeeb ntawm txhua lub tsev sib txawv.
2.2 Txawm tias them tib lub sijhawm, lub roj teeb thiab kev ua haujlwm ntawm txhua lub tsheb hluav taws xob sib txawv.
2.3 Tsis tas li ntawd, kev them nyiaj qeeb thiab them ceev ceev hauv zej zog feem ntau yog siv ntau lub sijhawm.