Transformer, Kuv ntseeg tias ntau tus phooj ywg tsis txawv. Muaj ib qho parameter ntawm transformer nameplate, hu ua "impedance voltage", uas feem ntau yog ib feem ntawm 5-10, thiab nws yog kwv yees tias txhua leej txhua tus tau pom nws. Cov nram qab no transformer tseem hu ua "luv Circuit Court impedance", thiab tam sim no tus qauv lub npe kuj luv luv Circuit Court impedance, tab sis kuv tseem nyiam hu rau impedance voltage.
■ Dab tsi yog qhov impedance voltage? Lub impedance voltage yog ib tug transformer parameter qhia raws li ib tug feem pua, uas shorts lub thib ob winding ntawm lub transformer, thiaj li hais tias tus thawj winding voltage maj mam nce, thaum lub thib ob winding short-circuit tam sim no mus txog rau lub rated tam sim no, qhov voltage thov los ntawm cov thawj winding ( luv-circuit voltage) thiab qhov ntsuas voltage piv feem pua. Cov mis yog: Uk%= luv-circuit voltage/rated voltage *100%.
Raws li lub ntsiab lus ntawm impedance voltage, luv luv-circuit thib ob winding, uas yog, Z\\\\'L yog sib npaug rau 0, thiab ces maj mam pressurize thawj winding kom txog rau thaum tam sim no nyob rau hauv lub thib ob sab yog sib npaug. mus rau qhov ntsuas tam sim no ntawm ob sab ntawm lub transformer, uas yog luv luv-circuit voltage tus nqi peb xav tau. Tom qab ntawd raws li cov qauv dhau los nws yog ib qho yooj yim kom paub qhov impedance voltage tus nqi.
■ Kev siv impedance voltage yog dab tsi?
impedance voltage yog ib qho tseem ceeb parameter ntawm lub transformer, nws muaj feem xyuam rau ntau yam ntawm transformer, xws li: muaj peev xwm, tooj liab poob, hlau poob, coil khoom thiab cov qauv.
Nws muaj feem xyuam rau kev ruaj ntseg ntawm cov khoom siv hluav taws xob, lub zog hluav taws xob zoo ntawm cov khoom thauj, kev nyab xeeb thiab kev ntseeg siab ntawm transformer tom qab kev sib txuas, thiab lwm yam.
Qhov sib txawv tiag tiag ntawm impedance voltage
Los ntawm cov ntsiab lus saum toj no, nws tsis yooj yim pom tias impedance voltage yog qhov tsis sib xws hauv kev siv tswv yim.
· transformers nrog tib lub peev xwm, tsis tshua muaj impedance voltage muaj tsawg tus nqi, high efficiency thiab pheej yig tus nqi. Lub zog poob thiab qhov hloov hluav taws xob hloov pauv thaum lub sijhawm ua haujlwm kuj tseem me me, thiab qhov hluav taws xob zoo yog qhov yooj yim los tswj thiab lav. Yog li ntawd, los ntawm kev xav ntawm kev ua haujlwm ntawm daim phiaj hluav taws xob, nws cia siab tias qhov impedance voltage me me.
· Txawm li cas los xij, xav txog qhov xwm txheej uas lub transformer txwv qhov luv luv Circuit Court tam sim no, nws cia siab tias qhov impedance voltage loj dua, kom tsis txhob muaj cov khoom siv hluav taws xob (xws li Circuit Court breakers, cais cov keyboards, cables, thiab lwm yam) tuaj yeem tiv thaiv tsis tau. cuam tshuam ntawm luv luv Circuit Court tam sim no thiab kev puas tsuaj thaum ua haujlwm.
Txhawm rau kom ua raws li qhov tsis sib haum xeeb ntawm kev ua haujlwm ib txwm ua thiab kev ua haujlwm raug mob, lub xeev muab cov kev cai sib txawv ntawm impedance voltage ntawm ntau hom transformers. Feem ntau, qhov siab dua qhov voltage, qhov ntau dua qhov impedance voltage tus nqi.
Piv txwv li, lub zog transformer ntawm qib 6 ~ 10 kV yog 4 ~ 5.5%; 35 kV qib fais fab transformer yog 6.5 ~ 8%; Lub hwj chim transformer ntawm 110 kV qib yog 8 ~ 9%; 220 kV qib fais fab transformers mus txog 12 txog 14%. Qhov no tso cai rau lub transformer impedance voltage yuav standardized.
Tus txheej txheem ntawm impedance voltage kuj tuaj yeem hloov mus rau qhov sib npaug ntawm kev hloov pauv vim tias qhov hloov pauv ntawm qhov hloov pauv nrog qhov sib txawv impedance voltage tsis zoo ib yam thaum lub sijhawm thauj khoom. Thaum cov transformers nrog tib lub peev xwm thiab txawv impedance voltages khiav nyob rau hauv parallel, lub transformer nrog me impedance voltage yog overloaded, thaum lub transformer nrog loj impedance voltage tsis tag loaded. Xws li ob transformers khiav nyob rau hauv parallel, ob qho tib si kev nyab xeeb thiab uneconomic.
