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Qhia rau ntau qhov kev sim rau ncoo mounted transformers

Jun 05, 2025

Tso lus

Ntawv
  1. I. Cov kev sim ua ntu zus rau lub ncoo - Mounted Transformers
  2. Ii. Hom kev xeem rau ncoo - mounted transformers
  3. III. Kev ntsuam xyuas tshwj xeeb rau ncoo - Mounted Transformers

I. Cov kev sim ua ntu zus rau lub ncoo - Mounted Transformers

Ncoo {- mounted transformers yauv hauv covKev Kuaj Sij HawmUa ntej tawm hauv lub Hoobkas kom paub meej tias kev ua tau zoo, kev nyab xeeb, thiab kev ntseeg tau hauv kev pabcuam. Hauv qab no muaj cov lus qhia ntxaws ntxaws ntawm txhua qhov kev sim ua haujlwm:

 

1. Wining Kuj Xeem

Lub hom phiaj:
Txhawm rau ntsuas qhov tsis kam ntawm cov siab thiab qis - voltage windings, kuaj xyuas cov teeb meem zoo li kev sib txuas tsis zoo, xoob sib txuas, lossis hloov xoob.

 

Txojkev:

  • Siv aDC Choj lossis micro micro - hawmeterlos ntsuas.
  • Kev ntsuas yuav tsum tau noj nyob rau hauv ib lub xeev txias (chav sov), thiab txias yuav tsum sau cia rau kev kho.
  • Ntsuas txhua theem ntawm ob qho siab thiab qis - voltage sab.
  • Cov kev tsis kam muaj nuj nqis ntawm cov theem ntsuas yuav tsum zoo sib xws.
  • Qhov kev sim ua tam sim no feem ntau yog 10% -15% ntawm cov ntaus nqi tam sim no.

Winding Resistance Test

Turns Ratio Test

 

2. Hloov cov piv txwv

Lub hom phiaj:
Txhawm rau xyuas tias kev lem sib piv ntawm cov siab thiab qis - voltage windings phim cov tsim qauv tsim qauv.

 

Txojkev:

  • Siv aHloov Cov Tes Tes Recio (TTR).
  • Kuaj txhua ntu (A, B, C) thiab txhua tus kais txoj haujlwm.
  • Kev pub muaj kev pub tshwj xeeb feem ntau yog ± 0.5%.
  • Cov sib txawv tseem ceeb ntawm cov theem yuav qhia cov kev ua txhaum winding lossis cov kev sib txuas tsis raug.

 

3. Polarity thiab Theem Piv Txwv

Lub hom phiaj:
Txhawm rau kom ntseeg tau qhov kev sib txuas raug cai polarity thiab theem kev sib raug zoo, tshwj xeeb yog qhov tseem ceeb rau kev ua haujlwm sib txawv.

 

Txojkev:

  • Thov cov voltage qis (piv txwv li, 100v ac) rau lub siab- voltage sab thiab ntsuas qhov ua rau voltage {{voltage sab.
  • Txiav txim siab seb tus hloov pauv tauadditive lossis rho nyiaj polarity.
  • Rau peb {- qeb units, txheeb xyuas qhov tseeb theem ua ntu zus.

Polarity and Phase Relation Test

No-Load Loss and Excitation Current Test

 

4. Tsis muaj {- ntim khoom poob thiab kev ntsuas tam sim no

Lub hom phiaj:
Txhawm rau ntsuas cov tub ntxhais (hlau) poob thiab magnetizing tam sim no nyob rau hauv tsis muaj - kev cuam tshuam nrog cov khoom siv tseem ceeb thiab kev sib dhos.

 

Txojkev:

  • Thov ntsuas hluav taws xob rau lub siab - voltage sab thaum khaws qhov qis- voltage sab qhib.
  • Ntsuas cov hwj chim tawm (tsis muaj {- phoo ntawv poob) thiab cov tswv yim tam sim no (zoo nkauj tam sim no).
  • Kev zam kev tam sim no yuav tsum muaj feem ntau tsawg dua 2% -5% ntawm rated tam sim no.
  • Siab tsis muaj {{{0} clicts butes yuav qhia cov tub rog sib koom ua ke, tsis muaj txiaj ntsig silicon hlau.

 

5. Thauj khoom poob thiab yaum cov hluav taws xob ntsuas

Lub hom phiaj:
Txhawm rau txiav txim siab tus tooj liab (I²R) poob thiab impedance voltage nyob rau hauv load tej yam kev mob.

 

Txojkev:

  • Luv ib sab (feem ntau tsawg {- voltage), tom qab ntawd txhaj tam sim no los ntawm lwm sab kom txog thaum ntaus nqi tam sim no.
  • Ntsuas cov tswv yim voltage, tam sim no, thiab lub zog los suav cov khoom poob.
  • Xam cov impedance voltage (raws li ib feem pua ​​ntawm rated voltage).
  • Kev yuam yuav yog qhov tseem ceeb rau kev txhaum tam sim no kev suav cov kev ua kev sib koom tes thiab ua kom sib haum xeeb.

Load Loss and Impedance Voltage Test

AC Withstand Voltage Test

6. AC withstand voltage kuaj (nyob zoo -} lub laujktau)

Lub hom phiaj:
Txhawm rau txheeb xyuas lub dielectric lub zog ntawm cov rwb thaiv tsev system thiab kuaj xyuas cov tsis xws luag.

 

Txojkev:

  • Thov ib daim ntawv qhia txog 50/60 HzAC ntau voltagemus rau windings rau 1 feeb.
  • Kev ntsuas hluav taws xob ua raws cov qauv (piv txwv li, IEC 60076), xws li 50 kV rau tsawg dua lossis sib npaug rau 35kv transformers.
  • Tsis muaj flashover lossis tawg yuav tsum tshwm sim thaum ntsuas.
  • Kev tsim nyog ua haujlwm thiab kev ntsuas kev nyab xeeb yuav tsum yog ua kom ua haujlwm ua ntej.

 

 

7. Kev sim ua kom muaj peev xwm

Lub hom phiaj:
Txhawm rau txheeb xyuas lub rwb thaiv tsev muaj zog ntawm lem thiab ntawm windings.

 

Txojkev:

  • Siv lub siab voltage ntawmMuab ob npaug rau cov neeg ntaus nqi (piv txwv li, 100 hz)rau qhov qis - voltage winding rau ntxiasOb zaug qhov ntsuas hluav taws xobNyob rau siab - voltage winding.
  • Qhov kev xeem ntev yog 60 vib nas this.
  • Tsim los qhia tig tig - rau -} tig cov rwb thaiv tsev tsis muaj zog.
  • Tsis muaj ib nrab tshem tawm, angleover, lossis kev puas tsuaj yuav tsum tshwm sim.

Induced Potential Test

Tank Leakage Test

 

8. Tank Sockage (Siab) Kuaj

Lub hom phiaj:
Txhawm rau txheeb xyuas kev sib khi ntawm kev ncaj ncees ntawm lub tank transformer los tiv thaiv cov roj txaws thiab noo noo.

 

Txojkev:

  • Sau lub tank nrog0.2-0.35 mpa ntawm huab cua lossis nitrogen, tswj siab rau 12-24 teev.
  • Siv cov xab npum lossis cov tshuab hluav taws xob hluav taws xob los soj ntsuam Welsds thiab cov pob qij txha rau npuas.
  • Hloov pauv, ua ahydrostatic (ua kua siab) xeemnrog roj.
  • Tsis muaj deformation lossis to tso cai.

Ntsiab lus ntawm cov lus xeem

Tsis yog.

Xeem ntawv

Lub hom phiaj

Cov Qauv Txheej Txheem

1

Cua tsis kam

Tshuaj xyuas winding kev ncaj ncees thiab tiv tauj zoo

Ntsuas DC tsis kam rau ib theem

2

Tig piv

Txheeb xyuas qhov tseeb tig sib piv ntawm HV thiab LV

Siv cov tes ntsuas sib piv sib piv (TTR)

3

Polarity thiab theem piv

Xyuas kom meej polarity thiab theem rau kev siv sib txuas

Polarity thiab theem kuaj

4

Tsis muaj {- phoo ntawv poob & hloov tam sim no

Kuaj cov tub ntxhais zoo thiab ua ke

Thov ntsuas hluav taws xob thiab ntsuas kev poob qis / tam sim no

5

Thauj khoom poob & impedance voltage

Ntsuas tooj liab liab thiab impedance

Luv - Circuit Court Ntsuam rau hauv Rated Tam Sim No

6

AC withstand voltage

Tshawb xyuas cov rwb thaiv tsev withstand voltage

Thov rated ac siab voltage rau 1 min

7

Inducts Cov Peev Xwm Kuaj

Kuaj xyuas tig - rau -} Nyem - winting rwb thaiv tsev

Thov siab siab - zaus, siab-} voltage kuaj

8

Tank Leakage (Kuaj Siab)

Xyuas kom tsis muaj roj / roj xau hauv siab

Roj lossis hydrostatic siab xeem

 

 

Ii. Hom kev xeem rau ncoo - Mounted Transformers

Hom kev ntsuam xyuas tau ua rau aTus Sawv Cev NyobNtawm ib transformer series kom paub tseeb tias tus qauv tsim raws kev ua tau zoo thiab cov qauv kev nyab xeeb nyob rau hauv huab lossis cov xwm txheej tshwj xeeb. Cov kev ntsuam xyuas no tsis yog ua rau txhua koog, tab sis ntawm ib lub hnoos qeev los ntawm cov kab khoom. Cov kev kuaj hom tseem ceeb rau ncoo - Mounted Transformers suav nrog:

 

 

🧪1. Kev ntsuas kub nce

🔍Lub hom phiaj:

Txhawm rau pov thawj tias tus hloov roj cua thiab cov roj insulating thiab insulating roj nyob hauv qhov ntsuas kub thiab txias nyob rau hauv cov kev ntsuas ntsuas kub nyob rau hauv cov haujlwm ntev {}} kev ua haujlwm ntev.

 

🔧Txoj kev:

  • Ua ntaub ntawvCov Ntsuas Hluav Taws Xob thiab Cov Ntaus Ntaus Tam Sim Nonyob rau hauv chav tsev kub.
  • Kev lag luam lub transformer tsis tu ncua kom txog thaum thermal equilibrium tau mus txog (feem ntau 8-10 teev).
  • Ntsuas:
  • Winding kub nceNtawm kev ua tsis kam hloov (tsis ncaj qha txoj kev).
  • Sab saum toj cov roj kubsiv thermocouples lossis kub sensors.
  • Qhov ntsuas kub txo qis (raws li IEC 60076-2):
  • Cov roj sab saum toj kub nce:Tsawg dua los yog sib luag rau 60 k
  • Winding kub sawv:Tsawg dua los yog sib npaug rau 65 k

 

✅Cov txheej txheem lees txais:

Qhov kub nce yuav tsum tsis pub dhau tus qauv kev txwv kom tsis txhob muaj rwb thaiv tsev nrawm lossis txo lub neej.

Temperature Rise Test

Lightning Impulse Withstand Test

 

⚡2. Xob laim yuam kev tiv thaiv kev ntsuam xyuas

🔍Lub hom phiaj:

Txhawm rau txheeb xyuas qhov hloov hluav taws xob muaj peev xwm tiv thaiv qhov siab {{voltage transients tshwm sim los ntawm xob laim lossis hloov tshiab} voltage wwb thaiv.

 

🔧Txoj kev:

  • Siv cov qauv1.2 / 50 μS laim ntom nti keejsiv ib lub tshuab hluav taws xob tsis sib haum.
  • Thov 5 Qhov Zoo thiab 1 Tus Neeg Tsis Txaus Siab thiab Tsis Muaj Kev Lom Zem Tsis Txaus Siab rau qhov siab- voltage winding.
  • Qhov qes - voltage winding yog grounded.
  • Saib xyuas cov vasformic rau distortion, ib nrab tawm, lossis kev puas tsuaj.

 

✅Cov txheej txheem lees txais:

Tsis muaj lub plhaw, rwb thaiv tsev rwb thaiv tsev, lossis ib feem tawm yuav tshwm sim thaum lossis tom qab cov kev xeem yuam kev.

 

🔩 3. Luv luv - Circuit Court Wallcuit Cotand

🔍Lub hom phiaj:

Txhawm rau txheeb xyuas qhov hloov pauv ntawm cov neeg kho tshuab thiab thermal zog nyob rau hauv cov kev txhaum ua txhaum, xws li luv luv hluav taws xob ntawm qhov qis {{voltage sab.

 

🔧Txoj kev:

  • Luv - Circuit Court qhov qis - voltage sab.
  • Thov voltage ntawm siab - voltage sab los tsimntsuas luv luv - Circuit Court tam sim no(Feem ntau 8-25 zaug ntaus nqi tam sim no).
  • Ntev:0.25 mus rau 2 vib nas this, Simulating tiag tiag - NTIAJ TEB Luv -} Circuit Court.
  • Ntsuas cov tsis ua ntej thiab tom qab kuaj:
  • Cua tsis kam
  • Tig piv thiab impedance
  • Tso tseg
  • Yeem: Disassemble los kuaj xyuas kev deformation ntawm lub cev lossis cov cua daj cua dub

 

✅Cov txheej txheem lees txais:

Tsis muaj kev cuam tshuam nrog lossis tsis muaj teeb meem hauv cov hluav taws xob tsis sib xws tom qab sim.

Short-Circuit Withstand Test

Sound Level Measurement

 

🔊4. Lub suab ntsuas qib

🔍Lub hom phiaj:

Txhawm rau ntsuas cov suab nrov tsim los ntawm tus hloov pauv thaum lub sijhawm ua haujlwm, feem ntau vim yog Core MagnetosTs, thiab paub meej tias muaj kev txwv ib puag ncig.

 

🔧Txoj kev:

  • Ua kom lub siab - voltage sab nrogCov Ntsuas Hluav Taws Xob, Thaum lub sijhawm qis - voltage sab yog qhib (tsis muaj {{1} thauj khoom mob).
  • Ua qhov kev sim ua nyob rau hauv sab hauv lossis semi-} anchhoic Chamber raws liIEC 60076-10lossisIeee C57.12.90.
  • Siv aSuab Theem NtsuasTxhawm rau ntsuas suab nrov ntawm ntau cov ntsiab lus1 meterdeb ntawm transformer nto.
  • Qhia covQhov nruab nrab lossis siab tshaj plaws -} qhov hnyav suab siab qib siab (DB [a]).

 

✅Cov txheej txheem lees txais:

  • Tsawg dua los yog sib npaug rau 60-70 dB [a] hauv cheeb tsam muaj kev lag luam
  • Tsawg dua los yog sib npaug rau 55 dB [a] nyob rau hauv thaj chaw lossis suab nrov- Cov chaw ib puag ncig

📋Ntsiab lus ntawm cov hom kev xeem

Tsis yog.

Ntsuas Yam

Lub hom phiaj

Cov Qauv Txheej Txheem

1

Kev ntsuas ntsuas kub

Txheeb xyuas thermal ruaj khov nyob rau hauv rated load

Kev Ntsuas Cov Ntaus, Ntsuas WINDING & Roj Temp

2

Xob laim ntsuas

Ntseeg rwb thaiv tsev tuaj yeem tiv taus xob laim

Siv cov qauv 1.2 / 50 μS impulse ke

3

Luv - Circuit Court Wallcuit Cotand

Siv tau kho tshuab / hluav taws xob ruaj khov

Txhaj siab rau qhov ua txhaum tam sim no rau lub sijhawm luv luv

4

Suab ntsuas

Paub meej tias lub suab nrov ua haujlwm yog nyob hauv kev txwv

Tsis muaj {- thauj khoom, ntsuas suab siab siab thaum 1m

 

 

III. Kev ntsuam xyuas tshwj xeeb rau ncoo - Mounted Transformers

Cov kev ntsuam xyuas tshwj xeeb yog ua los muabCov ntaub ntawv kuaj mob ntxivlos yog ua raws liTxhim kho kev ua tau zoo zuj zusCov. Lawv tsis yog ib feem ntawm kev sim ua ib txwm lossis hom, tab sis feem ntau thov los ntawm cov neeg siv rau cov ntawv thov tseem ceeb lossis kev ntsuas kev cai.

 

1. Partial tso tawm (PD)

🔍 Hom Zog:

Txhawm rau txhawm rau kom muaj zog me ntsis lossis tsis xws luag hauv cov txheej txheem rwb thaiv tsev (xws li vows, tawg, lossis cov khoom sib tw) uas yuav ua rau muaj kev cuam tshuam ib feem thiab muaj kev cuam tshuam tsis ua tiav.

 

🔧Txoj kev:

  • Apply voltage (usually 1.5 × rated phase-to-ground voltage) to the transformer windings.
  • Siv aPD ntsuas ntsuas ntsuaslos saib xyuas kev tawm mus haujlwm (ntsuas hauvPC- picocoulbs).
  • Kev ntsuas feem ntau ua rau hauv siab voltage thiab tswj ib puag ncig.

 

✅Cov txheej txheem lees txais:

  • Raws li IEC 60270 lossis IEEE C57.113.
  • PD qib yuav tsum yog< 10–50 pC(Nyob ntawm cov chav voltage).
  • Tsis muaj kev txhawb nqa lossis nce qib PDD thaum ntsuas.

Partial Discharge Test

Oil Dielectric Breakdown Voltage Test

 

2. Roj dielectric raug kev kub ntxhov voltage (BDV) xeem

🔍Lub hom phiaj:

Txhawm rau soj ntsuam cov roj insulating rasulating muaj peev xwm tiv thaiv hluav taws xob hluav taws xob, kom nws tsis txhob raug kev paug, noo noo, lossis kev laus.

 

🔧Txoj kev:

  • Nqa cov qauv siv roj los ntawm lub taub hlau hloov hluav taws xob.
  • Muab nws tso rau hauv tus qauv ntsuas ntawm tes nrogOb kheej kheej hluav taws xob hluav taws xobTeeb ntawm qhov chaw ruaj khov (feem ntau yog 2.5 hli lossis 4 hli).
  • Ua ntaub ntawvAc voltage elajkom txog thaum rhuav tshem kev puas tsuaj (txim taws) tshwm sim.
  • Kev xeem yog rov ua 5-6 zaug; Qhov nruab nrab rhuav tshem hluav taws xob raug suav.

 

✅Cov txheej txheem lees txais:

  • Rau cov roj ntxhia roj ntxhia:Ntau dua los yog sib npaug rau 30-40 kv.
  • Rau hauv -}} Cov Roj Pab:Ntau dua los yog sib npaug rau 25 kv.
  • Yog tias cov txiaj ntsig yog tsawg, lub cev qhuav dej lossis cov roj hloov roj.

 

3. Vais rov qab cov lus teb siab

🔍Lub hom phiaj:

Txhawm rau txhawm rau cov tshuab hluav taws xob lossis kev tawm tsam ntawm cov tub ntxhais, windings, lossis clamping qauv txheej tom qab thauj, luv voj voog, lossis kev poob siab.

🔧Txoj kev:

  • Thov qhov tsawg - voltage cheb teeb liab (feem ntau 10 hz - 2 MHz) rau cua.
  • Ntsuas thiab sau cov hloov pauvZaus teb tau kos npe.
  • Piv cov txiaj ntsig rau kev siv (Hoobkas pib lossis ua ntej - cov xwm txheej tshwm sim).

✅Cov txheej txheem lees txais:

  • Tsis muaj universal pass / tsis muaj nuj nqis.
  • Kev hloov pauv ntawm resonance cov ntsiab lus, qhov ntau, lossis cov bands ntau zaus yuav qhia tau tias:
    • Winding Alplacement
    • Cov tub ntxhais tub sab
    • Coj txav
    • Luv tig

Sweep Frequency Response Analysis

Dissolved Gas Analysis

 

4. Dissolved Roj Kev Tshawb Xyuas (DGA)

🔍Lub hom phiaj:

Txhawm rau txhawm rau paub thaum ntxov cov cim qhia ntawm thermal lossis hluav taws xob ua txhaum los ntawm kev txheeb xyuas cov roj yaj, uas yog los ntawm cov roj av ntawm cov kev ua kom muaj kev cawm dim.

 

🔧Txoj kev:

 

  • Nqa cov qauv siv roj siv siv cov txheej txheem tsim nyog (tiv thaiv cov pa paug).
  • Kev sivRoj ChromatographyKev ntsuas cov roj tseem ceeb:
  • Hydrogen (H₂)
  • Methane (CHO)
  • Ethylene (C₂H₄)
  • Acetylene (C₂H₂)
  • Carbon Monoxide (CO)
  • Cov pa roj carbon dioxide (pa)
  • Txheeb xyuas cov qauv zoo liIec 60599, IEEE C57.104, lossisNtshuam Duvaltxoj kev.

 

✅Txhais:

  • Cov roj av roj tsawg: cov laus laus lossis tsis ua haujlwm.
  • Txhawb nqa hydrocarbons: overheating lossis arcing.
  • Siab acetylene (c₂h₂): yuav muaj arcing.
  • Co / co₂ piv: daim ntawv rwb thaiv tsev.

 

5. Corrosion Tshuaj Xyuas (TANK & XIM SECCTIONS)

🔍Lub hom phiaj:

Txhawm rau kom ntseeg tau tias tus hloov pauv hloov hluav taws xob (feem ntau hlau) thiab nws cov txheej txheej tuaj yeem tiv taus corrosion, tshwj xeeb tshaj yog rau kev teeb tsa sab nraum zoov lossis sab nraum zoov.

 

🔧Txoj kev:

  • Kev kuaj xyuas xeb rau xeb, blistering, tawg, lossis ntug corrosion.
  • Xim tuab kev ntsuas kev ntsuas sivZaj Duab Xis Dry Thermness Tag Huv Tibsi.
  • Ntsev tshuaj ntsuas (ib astm B117) lossis cov av noo chamber kuaj.
  • Evaluate coating adhesion (cross-hatch or pull-off test).

 

✅Cov txheej txheem lees txais:

  • Tsis pom xeb xeb.
  • Txheej thickness ntsib cov lus qhia tshwj xeeb (feem ntau> 80-120 μm).
  • Xim Adhesion ntsuas ntau dua lossis sib npaug ntawm chav kawm 3b (ib qho ustm d3359 lossis ISO 2409).

Corrosion Inspection

Functional Testing of Accessories

 

6. Kev ntsuas kev ua haujlwm ntawm cov khoom siv

🔍Lub hom phiaj:

Txhawm rau pov thawj tias txhua qhov teeb tsa txuas ntxiv tau ua kom raug thiab ua haujlwm zoo nrog kev ua haujlwm hloov.

 

🔧Xws li:

  • Ntaus Siab Ntaus Khoom: Ua haujlwm ntawm kev ntsuas siab; audible los yog kev kuaj pom.
  • Roj Txheej Txheem: Qhia kev nyeem ntawv raug nyob rau hauv kev ua haujlwm kub.
  • Qhov taw qhia kub: Simulate kub thiab kos cov tshuab / teb chaws.
  • Buchholz Relay (yog tias muaj nyob): Simuli ntxiv roj lossis cov roj.
  • Cov hloov pauv hloov:
  • Los ntawm phau ntawv: Tshuaj xyuas cov haujlwm du thiab txuas ntxiv.
  • Tsis siv neeg (yog tias OLTC muaj): simululation tswj cov cim thiab pov thawj qib hloov.

 

✅Cov txheej txheem lees txais:

  • Txhua cov khoom siv yuav tsum ua haujlwm kom zoo tsis muaj xau, ncua, lossis teeb liab poob.
  • Kev ntsuas tshuaj thiab cov lus teb yuav tsum yog nyob hauv kev thev taus ntau.

 

 

 

📋 Cov lus piav qhia ntawm kev ntsuam xyuas tshwj xeeb

Tsis yog.

Xeem Npe

Lub hom phiaj

Tus Qauv Tseem Ceeb / Sau Ntawv

1

Kev Ntsuas Ib Cheeb Tsam

Pom cov xib rwb thaiv tsev tsis xws luag

IEC 60270 / IEEE C57.113

2

Roj Dielectric Kev Ua Txhaum Cai Xeem

Soj ntsuam cov roj rwb thaiv tsev muaj zog

ASTM D1816 / IEC 60156

3

SFRA (cheb zaus teb)

Pom winding / core kev hloov chaw

IEEE C57.149

4

Dga (yaj roj tsom)

Txheeb xyuas hluav taws xob / thermal ua txhaum

IEC 60599 / IEEE C57.104

5

Corrosion & Coating Soj ntsuam

Nco ntsoov ntev -} term tank tiv thaiv

ASTM B117, D3359 / ISO 2409

6

Accessories Accessories Kuaj

Txheeb xyuas qhov haujlwm kom raug ntawm txhua cov khoom siv

Chaw tsim tshuaj paus kev tshwj xeeb / IEC

Xa kev nug