Impedance ntawm transformer

 

 

 

1.1 Lub ntsiab lus ntawm impedance

Kev Txhais Lus: Lub impedance ntawm ib transformer hais txog qhov tsis kam nws tawm ntawm tam sim no thaum tam sim no ntws los ntawm nws. Nws muaj ob ntu: kev tiv thaiv thiab inductive reactance. Qhov ntau ntawm cov impedance feem ntau qhia raws li feem pua ​​thiab cim ntawm transformer coopleplate.

Thaj chaw ib feem:

• Kuj (R): Qhov no yog qhov tiv thaiv hluav taws xob hauv lub transformer winding, uas yog feem ntau txiav txim siab los ntawm cov khoom siv thiab ntev ntawm winding. Kev tawm tsam tuaj yeem ua rau hluav taws xob lub zog yuav tsum ploj hauv daim ntawv ntawm lub zog tshav kub, uas yog lub npe hu ua Tooj Liab Poob.

• Feem ntau qhov kev xav txog (x): ntu no ntawm cov impedance keeb kwm los ntawm inductance ntawm winding. Thaum hloov lwm qhov kev hla tam sim no los ntawm kev winding, cov kev ua kom pom tseeb yuav cuam tshuam qhov hloov ntawm tam sim no. Qhov kev ua haujlwm cuam tshuam yog feem ntau txiav txim siab los ntawm cov qauv geometric ntawm cov windings thiab to muaj kev sib nqus flux ntawm cov windines ntawm cov windings.

 

1.2 Cov lus qhia hom ntawm impedance

Tag nrho cov impedance feem ntau qhia nyob rau hauv cov qauv ua thiab muaj kev sib xyaw ua ke ntawm kev tiv taus thiab inductive reactance.

Z=r + jx,  Ntawm lawv, j yog cov kev xav

Nco tseg: impedance tsis xa mus rau lub impedance ntawm ib lub zog hluav taws xob lossis cov hluav taws xob tsis yeem, tab sis theej cov hluav taws xob ntau dua, tab sis theej cov hluav taws xob sib xyaw ua ke ntawm cov tshuab hluav taws xob ntawm cov hluav taws xob ntawm ib lub xeev ua haujlwm.

Piv txwv li, lub impedance ntawm peb-coil transformer:

High voltage - Qis Voltage qis

High voltage - nruab nrab voltage

Nruab nrab voltage - qes voltage

 

 

2.1 lub ntsiab lus ntawm luv luv-circuit

Kev txhais: Lub luv luv-Circuit Coistance ntawm Transformer Coopplate yog qhov kev ntsuas hluav taws xob tseem ceeb, uas qhia txog tus yam hluav taws xob ntawm tus hloov pauv hauv lub chaw luv. Cov lus luv luv-Circuitance yog feem ntau qhia raws li feem pua ​​(% z), sawv cev rau cov rated tam sim no thaum muaj hluav taws xob luv luv ntawm cov ntsuas hluav taws xob ntawm thawj lub winding.

 

Txoj Kev Tsim:

Luv luv-circuit yuam kev () tuaj yeem qhia los ntawm cov qauv hauv qab no:

Ntawm lawv:

• Puas yog tus voltage yuav tsum muaj rau thawj qhov cua mus txog qhov rated tam sim no thaum lub winding theem nrab yog luv-taws.

• yog cov ntsuas hluav taws xob ntawm thawj winding.

Qhov tseem ceeb ntawm cov lus luv luv

 

2.2 qhov tseem ceeb ntawm cov lus luv luv

2.2.1 Txwv luv luv ntawm cov tsheb luv luv

Lub luv-Circuit Coistance txiav txim siab qhov ntau ntawm cov luv luv ntawm cov neeg luv luv ntawm cov khoom siv tam sim no los ntawm tus hloov pauv thaum lub tshuab windation thib ob yog luv-ciruited. Luv-Circuit Court tam sim no yog qhov tseem ceeb tshaj plaws uas tuaj yeem tshwm sim hauv lub zog hluav taws xob, thiab nws yuav ua rau muaj kev hem thawj loj rau kev nyab xeeb ntawm cov khoom siv thiab tshuab.

Qhov ntau dua qhov luv-Circuit Coistance, qhov me dua cov khoom siv luv luv tam sim no, uas pab tiv thaiv cov khoom siv transformer thiab downstream los ntawm kev puas tsuaj dhau ntawm Circuit Court tam sim no.

Xam Luv Luv Luv

Muab: Tus neeg hloov chaw muaj peev xwm ntawm lub transformer yog 100mva, lub voltage yog 132\/11 kv, thiab lub luv-circuit yuam kev yog 10%. Laij cov luv luv-cerrcuit ntawm tam sim no ntawm ob qho siab thiab qis voltage sab.

= luv-circuit zaus tam sim no

=} rated tam sim no

Z% {= luv circuit Court Circuit Impedance

 

High Voltage Sab:

 

Tsawg Voltage Sab:

 

2.2.2 Cov kev cai voltage

Luv-Circuit Kev Hlau Hluav Taws Xob thiab Voltage Poob

Qhov ntau ntawm cov luv luv-circuitalis kev cuam tshuam ncaj qha cuam tshuam cov voltage poob ntawm lub transformer. Ib qho loj dua luv-Circuit Court impedance txhais tau tias thaum transformer yog nyob rau hauv lub windings yog qhov ntau dua, uas ua rau muaj kev poob qis dua hauv cov zis hluav taws xob. Hauv lwm lo lus, qhov ntau dua qhov luv luv-circuitance impedance, vim tias cov zis voltage hloov pauv ntxiv thaum lub nra hloov.

2.2.3 Kev Ua Haujlwm Sib Tw

Thaum ntau cov hloov pauv ua haujlwm hauv parallel, qhov ntau ntawm cov luv-circuittance txiav txim siab cov feem ntawm kev thauj khoom txhua transformer bears. Yog hais tias lub luv luv-circuitys uas cuam tshuam ntawm parallel transformers muaj ntau yam, lub nra yuav yog qhov faib tsis tau yooj yim

• Transformer nrog kev cuam tshuam tsawg

Nws yuav dais cov load loj. Qhov no yog vim tias lub impedance me me txhais tau tias ib qho kev tawm tsam me me, yog li nws tuaj yeem kis tau ntxiv tam sim no, ua rau muaj lub nra loj dua.

• hloov pauv nrog lub siab siab

Tom qab ntawd nws yuav ris ib lub nra me dua. Qhov no yog vim tias cov impedance loj dua yuav ua rau cov hluav taws xob loj dua, ua rau muaj kev hloov pauv me me uas tam sim no thiab yog li ib qho kev thauj khoom me me.

Ib qho ntawm cov xwm txheej rau kev ua haujlwm parallel yog tias cov kev cuam tshuam ntawm ntau yam hloov pauv tau zoo ib yam.

Piv txwv tias muaj ob transformers ua haujlwm hauv parallel:

Lub luv-Circuit yuam kev ntawm Transformer A yog 8%.

Lub luv-Circuit yuam kev ntawm Transformer B yog 10%.

Yog tias ob lub tshuab hluav taws xob ua haujlwm nyob rau hauv parallel, vim muaj cov khoom lag luam luv luv ntawm lub kaw lus yog 1000kva, ces tus neeg hloov pauv, thaum transformer B Tsuas Dais 400KVA.

Qhov no tsis sib luag yuav ua rau cov teeb meem hauv qab no:

• Tshaj dhau los: transformers nrog cov impectance qis yuav muaj overloaded, thaum cov neeg uas muaj kev cuam tshuam siab yuav nyob rau lub xeev teeb.

• Tsis muaj peev xwm tsawg: Vim tias tsis muaj peev xwm thauj khoom, kev ua haujlwm ntawm tag nrho cov kab ke yuav txo qis.

• Luv Luav: Transformers ua hauj lwm nyob rau hauv overload kev mob yuav muaj kev ntxhov siab luv vim kev ntxhov siab thiab nrawm.

2.2.4 Kev Tiv Thaiv Kev Tiv Thaiv

Luv-Circuit cuam tshuam muaj qhov cuam tshuam ncaj qha rau kev teeb tsa cov cuab yeej tiv thaiv xws li Relays Relays thiab Circuit Court tej rooj sib foob. Cov cuab yeej tiv thaiv feem ntau yuav tsum tau teeb tsa raws li luv luv cactruit tam sim no kom ntseeg tau tias qhov yuam kev tuaj yeem raug cuam tshuam rau lwm qhov ntawm cov kab ke.

Nkag siab ntawm lub luv-Circuit cuam tshuam ntawm tus hloov pauv yog pab tau rau kev tsim kev tiv thaiv tsim nyog los ua kom muaj kev nyab xeeb thiab kev ntseeg tau ntawm cov kab ke.

 

 

3.1 Qhov kom zoo dua ntawm kev quab yuam siab

• Txwv cov luv luv-circuitfone tam sim no

Transformers nrog cov kev cuam tshuam siab tuaj yeem txwv qhov ntau ntawm cov luv luv hluav taws xob tam sim no thaum lub sijhawm luv nqi tshwm sim. Qhov no pab tiv thaiv lub zog hluav taws xob thiab khoom siv thiab txo cov kev cuam tshuam ntawm kev ua txhaum ntawm lub system.

• Yooj yim thaum lub sijhawm ua haujlwm

Hauv kev hloov pauv ua haujlwm hauv kev sib txawv, yog tias muaj qhov sib txawv me ntsis), tab sis tsis muaj kev cuam tshuam ntau dua ntawm cov thauj khoom ntawm ib qho kev hloov pauv ntawm ib qho kev xav tsis zoo.

• Tus nqi yuav muaj tsawg

Hauv qee qhov kev tsim qauv, nce kev cuam tshuam tuaj yeem txo cov khoom siv winding siv, yog li cov nqi tsim khoom lag luam.

 

3.2 Qhov tsis zoo ntawm kev yuam kev siab

Cov kev cai hluav taws xob kev kawm tsis zoo

Transformers nrog lub siab yuam yuav yuav muaj kev hloov pauv tseem ceeb hauv lawv cov zis hluav taws xob thaum lub nra hloov. Qhov no tsis muaj qhov tsis zoo rau cov khoom uas yuav tsum tau muaj lub voltage ruaj khov, thiab cov hluav taws xob hluav taws xob tau loj

Lub zog loj loj

Cov imporance ntau dua txhais tau tias ntau dua kev tiv taus ntau dua thiab rov qab ua rau, uas yuav ua rau muaj zog dua thiab txo qis kev hloov kho.

 

3.3 Qhov zoo ntawm cov impedance qis

Nws muaj cov khoom lag luam zoo kev cai

Transformers nrog cov impectance qis muaj cov zis me me voltage hloov thaum lub thauj khoom hloov, thiab tuaj yeem muab cov hluav taws xob ruaj khov. Qhov no yog qhov tseem ceeb heev rau cov khoom siv uas rhiab rau cov khoom siv hluav taws xob, xws li cov khoom siv hluav taws xob thiab cov chaw ntsuas hluav taws xob, qhov twg qhov hluav taws xob poob qis.

Siab efficiency

Ib qho impedance me me txhais tau tias qis dua kev tiv thaiv thiab kev ua kom muaj kev ua kom muaj zog, uas feem ntau ua rau muaj zog dua thiab txo qis poob thaum lub sijhawm ua haujlwm.

 

3.4 Qhov tsis zoo ntawm cov impedance tsawg

Lub luv-Circuit Coad tam sim no yog tus loj

Tsawg impedance txhais tau tias thaum luv luv hluav taws xob tshwm sim, tam sim no yuav loj heev, uas yuav ua rau muaj kev cuam tshuam tseem ceeb ntawm cov kab ke thiab khoom siv. Qhov no yuav tsum muaj ntau txoj kev ntsuas thiab kim heev tiv thaiv.

Siab Tsim Nqi

Ua tiav cov implyance qis feem ntau yuav tsum siv cov ntaub ntawv ntau dua (xws li cov xaim xaim tuab lossis cov khoom loj dua) thiab cov nqi loj dua) thiab cov nqi nce ntxiv.

 

3.5 Txheem Xaiv

Hauv kev siv cov kev siv, Transformer cov neeg tsim qauv feem ntau yuav tsum tau pom qhov sib npaug taw tes ntawm cov hlau me ntawm impedance.

Qhov kev tshuav sib npaug no yog nyob ntawm:

• Kev Tiv Thaiv kom muaj lub zog fais fab

Yog hais tias lub luv luv-Circuit tam sim no yuav tsum tau nruj me ntsis tswj, tus qauv tsim nrog kev cuam tshuam loj dua tuaj yeem xaiv.

• Cov hluav taws xob hluav taws xob ruaj khov yuav tsum muaj ntawm lub nra

Yog tias ib qho kev tawm tsam ruaj khov voltage yog qhov yuav tsum tau, tus qauv tsim nrog lub imped me me yuav raug xaiv.

Lus txiav txim siab

Nyob rau hauv lub rooj sib tham ntawm lub rooj sib tham ua tau zoo, tus nqi yog feem ntau qhov kev txiav txim siab tseem ceeb.

 

 

4.1 Kuaj Xyuas Lub Hom Phiaj

Lub luv-Circuitance Impedance thiab load kev ntsuas yog qhov tseem ceeb rau kev hloov pauv ntawm Circuit Qhov kev ntsuas no tuaj yeem muab cov yam ntxwv tseem ceeb ntawm cov transformers ntawm tus transformer raws cov kev ua haujlwm tshwj xeeb thiab kev ua haujlwm ntawm transformer.

• Ntsuas cov kev cuam tshuam luv luv canduitance (% z)

Luv-Circuitity cuam tshuam cov nyhuv sib xyaw ua ke ntawm cov kev tiv thaiv thiab kev tawm tsam ntawm transformer thiab tseem ceeb heev rau kev ua yeeb yam ntawm kev ua txhaum.

• Ntsuas cov khoom poob

Thauj khoom poob (lossis tooj liab ploj) yog lub zog poob tshwm sim los ntawm winding tsis kam ntawm cov transformer nyob rau hauv rated load, uas tuaj yeem ntsuas los ntawm kev sim luv luv

 

4.2 Qhov Kev Ntsuas Kev Ntsuas

Luv luv-Circuitance Kev xeem yuav cuam tshuam nrog lub voltage tsis tshua muaj hluav taws xob) ntawm lub tshuab hluav taws xob qis (feem ntau thiab lub zog ntawm thawj lub winding lub sijhawm no. Raws li cov kev ntsuas no muaj nuj nqis, qhov luv-circuit yuam thiab thauj khoom poob ntawm tus hloov pauv tuaj yeem suav tau.

 

4.3 Cov Txheej Txheem Ntsuas

4.3.1 Kev Xeem Ntawv

Xov Xwm: Luv luv-Circuit Court ntu theem nrab (qis-voltage sab) winding ntawm lub transformer thiab txuas lub theem (High-voltage sab) winding rau cov khoom siv hluav taws xob).

Cov Khoom Siv Khoom Siv: Txuas cov cuab yeej ntsuas kom cov ntaub ntawv tsis txheeb xws li voltage, tam sim no thiab lub zog.

4.3.2 SIV VOLTAGE

Maj mam nce qhov voltage ntawm thawj sab los ntawm xoom kom txog thaum twg tam sim no ntawm thawj sab mus txog qhov ntsuas uas muaj rated tam sim no. Txij ntawm no, vim muaj luv ntawm Circuit Court ntawm sab nraud sab, qhov voltage yuav tsum nyob ze rau xoom.

4.3.3 Ntsuas

Voltage: Ntsuas thiab Sau Lub VoltageNtawm thawj sab

Tam sim no: Ntsuas thiab sau cov tam sim noNtawm thawj sab

Lub hwj chim: Ntsuas thiab sau cov lus qhia lub zog p, uas yog feem ntau yog cov khoom poob (tooj liab) ntawm winding.

4.4.4 xam

Muab xam los ntawm cov nqaij luv luv canduitts:

Feem pua ​​luv luv-circuit yuam kev (% z):

Ntawm lawv,yog cov ntsuas hluav taws xob ntawm lub transformer

Thauj khoom poob (tooj liab) yog hais txog lub zog p.

4.4.5 xeem mob

Kev ntsuam xyuas feem ntau yog ua nyob rau hauv chav tsev kub, tab sis vim yog tus tseem ceeb ntawm winding tsis kam, ntsuas ntsuas ntsuas qhov ntsuas kom sov.

Hauv kev sim, cov ntawv siv voltage yog tsawg. Nws tsuas yog xav kom ncav cuag cov rated tam sim no, tsis yog lub rated hluav taws xob, vim tias thaum lub zog thib ob yog luv-taws yog txaus los tsim cov rated tam sim no.

4.4.6 Tshawb xyuas cov txiaj ntsig tau

Luv-Circuit Court Impedance Tus nqi

Qhov ntsuas luv luv-Circuit Court impedance tus nqi yuav tsum tau ua ke nrog tus qauv tsim qauv lossis tus nqi ntawm lub npe. Yog tias qhov sib txawv yog qhov tseem ceeb, nws yuav qhia tau tias muaj cov teeb meem hauv kev tsim qauv lossis tsim cov hloov pauv.

Thauj khoom poob

Cov ntsuas hluav taws xob tsim (tooj liab poob) yog siv los ntsuas qhov ua tau zoo ntawm cov hloov pauv nyob rau hauv tag nrho cov kev mob. Qhov kev poob no yuav tsum nyob rau hauv cov kab lus teev nyob rau hauv tus qauv.

4.4.7 Tseem Ceeb

Lub luv-Circuitance Kev Kuaj Impedance tsis tsuas yog qhia txog tus qauv tsim thiab tsim cov khoom tseem ceeb ntawm cov txheej txheem, tab sis kuj tseem ua haujlwm sib luag ntawm cov transformer. Los ntawm cov kev xeem no, cov kws ua choj tuaj yeem ua kom muaj kev nyab xeeb thiab kev ntseeg tau ntawm cov hloov pauv hauv kev ua haujlwm tiag tiag. Hauv kev xaus, lub luv-Circuit Court kev sim yog ib kauj ruam tseem ceeb kom ntseeg tau tias cov transformer ua rau cov qauv tsim qauv thiab tuaj yeem ua haujlwm kom nyab xeeb thiab muaj txiaj ntsig.