kVA ≠ kW: Lub Hwj Huam Lub Tswv Yim Tsis Txaus Siab los ntawm 90% ntawm tib neeg

Muaj 1000 kVA transformer nrog ib tug uas twb muaj lawm load ntawm kwv yees li 200 kW. Yog tias peb xav ntxiv txog 600 kW ntawm cov khoom thauj tshiab, qhov hloov pauv no puas tuaj yeem tiv taus nws?

Lo lus nug no suav nrog ob pawg:kVA uathiabkW. Txhawm rau teb nws kom raug, peb yuav tsum nkag siab txog kev sib raug zoo thiab qhov sib txawv ntawm ob chav no.

 

● Kilovolt -Ampere (kVA)

Lub ntsiab lus: Ib chav tsev siv los qhia txog lub peev xwm ntawm cov khoom siv hluav taws xob (xws li transformers, motors, thiab lwm yam). Nyob rau hauv ib qho hluav taws xob AC: Voltage (kV) × Tam sim no (A)=Tso zis (kVA).kVA ua.

● Kilowatt (kW)

Txhais: Ib chav tsev ntawm lub zog sib npaug li 1000 watts.kW feem ntau yog siv los qhia lub zog ntawm cov tshuab hluav taws xob, lub cav, lub cev muaj zog, cov cuab yeej, cov tshuab, hluav taws xob cua sov, thiab xov tooj cua / TV transmitters.

kVA yog lub zog ntawm lub zog.

kW yog chav tsev ntawm lub zog (tiag tiag) lub zog.

Ntxiv rau qhov pom tseeb lub zog thiab lub zog nquag, muaj lub zog reactive, ntsuas hauv kvar (kilovar).

 

Dab tsi yog qhov txawv ntawm peb hom fais fab no?

1.Parent hwj chim yog tag nrho lub hwj chim muab los ntawm lub hwj chim qhov chaw.

2.Lub zog hluav taws xob yog lub zog siv tau los ntawm kev thauj khoom, hloov mus rau lwm hom hluav taws xob.Piv txwv li, cov nqi hluav taws xob koj them yog raws li lub zog nquag.

3.Reactive zog yog hais txog lub hwj chim uas tsis yog siv tiag tiag tab sis khaws cia ib ntus.Cov khoom siv nrog cov capacitors lossis inductors txuas ntxiv tsub thiab tso tawm yam tsis muaj kev siv lub zog tiag tiag; qhov no yog hu ua reactive zog.

 

Hwj chim Factor

Txhawm rau txiav txim siab ntau npaum li cas lub zog siv hluav taws xob tuaj yeem xa tawm, peb qhia qhovfais fab mov (PF), txhais raws li qhov piv ntawm lub zog siv zog (P) rau lub zog pom tseeb (S), txhais tau tiascov φ.

Piv txwv:

Tom ntej: 1000kVA transformer

Ntawm lub hwj chim factor cosφ=0.6, nws muaj peev xwm tso zis 600 kW ntawm lub zog nquag.

Ntawm lub hwj chim factor cosφ=0.9, nws muaj peev xwm tso zis 900 kW ntawm lub zog nquag.

Piv txwv li hluav taws xob nqi 1 RMB ib kWh:

Ntawm PF=0.6: transformer tsim 600 RMB / teev ntawm cov txiaj ntsig kev lag luam.

Ntawm PF=0.9: transformer tsim 900 RMB / teev ntawm cov txiaj ntsig kev lag luam.

Cov lus ceeb toom tseem ceeb: Transformer muaj peev xwm raug ntsuas hauv kVA, thaum lub zog thauj khoom yog nyob rau hauv kW.Qhov kev sib raug zoo yog: Lub zog hluav taws xob (kW)=Pom muaj zog (kVA) × Hwj chimFactor (cosφ)

Lub 1000 kVA transformer tsuas tuaj yeem xa 1000 kW ntawm lub zog zoo tshaj plaws ntawm 1, uas yuav luag tsis yooj yim sua hauv kev xyaum.

Hauv kev tsim engineering, tus nqi thauj khoom ntawm kwv yees li 90% yog kev lag luam thiab tsim nyog.Power mov tuam txhab uas muag feem ntau xav tau lub hwj chim tshaj qhov siab tshaj 0.9; Kev nplua siv yog tias nws qis dhau lawm.Lub zog tseem ceeb kuj tsis tuaj yeem tshaj 1, vim qhov no yuav nce qhov system voltage thiab cuam tshuam kev ua haujlwm.

Xaus

Lub 1000 kVA transformer Ameslikas muab 200 kW.Tom qab ntxiv 600 kW, tag nrho cov khoom siv hluav taws xob yog 800 kW.

Raws li ntev raws li lub zog qhov tseem ceeb yog nce mus rau qhov yuav tsum tau muaj, lub transformer yuav ua hauj lwm yam xyuam xim thiab tsis tu ncua nyob rau hauv no load.