Lub zog poob ntawm lub transformer yog muab faib ua hlau poob thiab tooj liab poob. Hlau poob kuj yog hu ua tsis muaj-load poob, uas yog nws qhov poob tas thiab yog qhov poob los ntawm cov tub ntxhais hlau (tseem hu ua core poob, thiab tooj liab poob tseem hu ua load poob).
Transformer poob xam mis
(1) Lub zog poob: ΔP＝Po＋KT 2 Pk
(2) Reactive zog poob: ΔQ＝Qo＋KT 2 Qk
(3) Lub zog poob qis: ΔPz＝ΔP＋KQΔQ
Qo≈Io%Sn, Qk≈Uk%Sn
Hauv cov mis: Qo - tsis muaj-load reactive zog poob (kvar)
Po--Tsis muaj load poob (kW)
Pk--rated load poob (kW)
Sn--Transformer rated peev (kVA)
Uk%-- luv luv voltage feem pua
--Load factor, uas yog qhov piv ntawm load tam sim no rau rated tam sim no.
KT--load fluctuation poob coefficient
Qk--Rated load magnetic to power (kvar)
KQ--Reactive fais fab kev lag luam sib npaug (kW/kvar)
Cov xwm txheej xaiv rau txhua qhov parameter thaum xam cov qauv saum toj no:
(1) Coj KT=1.05;
(2) Thaum qhov tsawg kawg nkaus load ntawm lub kaw lus raug coj mus rau 6kV ~ 10kV kauj ruam-downtransformernyob rau hauv lub nroog lub hwj chim daim phiaj thiab kev lag luam kev lag luam hluav taws xob daim phiaj, nws reactive zog sib npaug KQ=0.1kW/kvar;
(3) Qhov nruab nrab load yam ntawm transformer, rau kev ua liaj ua teb transformers,=20%; rau cov tuam txhab lag luam uas siv peb txoj haujlwm ua haujlwm,=75%;
(4) Transformer sijhawm ua haujlwm T=8760h, siab tshaj load poob teev: t=5500h;
(5) Qhov tsis muaj load poob Po, rated load poob Pk, Io% thiab Uk% ntawm transformer yog qhia nyob rau hauv cov khoom Hoobkas cov ntaub ntawv.
Cov yam ntxwv ntawm transformer poob
Po - tsis muaj-load poob, feem ntau hlau poob, nrog rau hysteresis poob thiab eddy tam sim no poob;
Hysteresis poob yog proportional rau zaus; proportional rau lub zog ntawm hysteresis coefficient ntawm qhov siab tshaj plaws sib nqus flux ceev.
Eddy tam sim no poob yog proportional rau cov khoom ntawm zaus, siab tshaj plaws sib nqus flux ceev, thiab thickness ntawm silicon steel ntawv.
Pc - load poob, feem ntau yog qhov poob ntawm cov resistor thaum lub load tam sim no dhau los ntawm winding, feem ntau hu ua tooj liab poob. Nws loj hloov nrog lub load tam sim no thiab yog proportional rau lub square ntawm lub load tam sim no; (thiab qhia los ntawm tus qauv coil kub hloov pauv tus nqi).
Load poob kuj raug cuam tshuam los ntawm qhov kub ntawm lub transformer. Nyob rau tib lub sijhawm, cov dej ntws tawm los ntawm cov khoom thauj tam sim no yuav ua rau muaj kev puas tsuaj tam sim no hauv cov winding thiab stray losses nyob rau hauv cov hlau qhov chaw sab nraum lub winding.
Tag nrho cov poob ntawm transformer ΔP=Po+Pc
Transformer poob piv=Pc /Po
Qhov ua tau zoo ntawm transformer=Pz / (Pz + ΔP), qhia hauv feem pua; qhov twg Pz yog lub zog tso zis ntawm ob sab ntawm lub transformer.