750 kVA Roj-Immersed Transformer Rwb thaiv tsev: Tsim & Ntsuas
Mar 23, 2026
Tso lus
Cov khoom tseem ceeb
- Cov txheej txheem rwb thaiv tsev, tsis yog cov hlau, txiav txim siab ntev npaum li cas lub tshuab hluav taws xob xa tawm kav ntev. Cellulose daim ntawv thiab cov roj ntxhia muaj hnub nyoog ntawm tus nqi teev tshwj xeeb los ntawm qhov kub thiab txias.
- Class A rwb thaiv tsev (105℃thermal class per IEC 60085) yog cov khoom siv ntsuas, tsis muaj qhov txwv. Raws li IEC 60076-2 qhov cua qhov nruab nrab kub nce yog txwv rau 65 K thiab cov roj saum toj kawg nkaus nce mus txog 60 K siab dua 40℃ambient.
- Txhua 8 K ntawm qhov cua kub ntxiv roughly ib nrab ntawm lub neej ntawm cov ntawv rwb thaiv tsev nyob rau hauv 80-120℃qhov rais (Montsinger txoj cai; qee cov lus qhia hais txog 6-10 K).
- Factory pov thawj ntawm rwb thaiv tsev zoo yog cov niaj hnub dielectric xeem teeb: rwb thaiv tsev tsis kam, tan δ, lub zog - zaus tiv taus 28 kV thiab xob laim impulse 75 kV rau 10 kV chav kawm, ib IEC 60076-3.
- Dissolved gas analysis (DGA) hloov cov roj mus rau hauv ib qho thaum ntxov - ceeb toom sensor: H2taw qhia rau ib nrab tso tawm, C2H4rau overheating, C2H2rau arcing, thiab CO/CO2rau daim ntawv degradation (IEC 60599 / IEEE C57.104).
Yog vim li cas lub Rwb thaiv tsev System teeb lub Service Life
A 750 kVA roj-raug faib transformeryog lub tshuab compact: ib lub tank, ib tug tub ntxhais, thiab peb windings uas yuav tsum nqa tag nrho cov ntsuas tam sim no rau xyoo lawm. Cov tivthaiv uas txwv nws lub neej muaj txiaj ntsig yog yuav luag txhua lub sijhawm rwb thaiv tsev. Copper, core steel thiab lub tank tuaj yeem ua rau lub sijhawm ntev, tab sis cov ntawv cellulose thiab cov roj uas nyob ib puag ncig cov neeg siv hluav taws xob muaj hnub nyoog tsis tu ncua nyob rau hauv tshav kub, noo noo thiab hluav taws xob kev ntxhov siab.
Distribution transformers feem ntau yog tsim los rau kev pab cuam lub neej ntawm 20 mus rau 30 xyoo. Daim duab ntawd yog los ntawm kev coj tus cwj pwm kev laus ntawm cov ntawv rwb thaiv tsev, ua qauv hauv phau ntawv qhia kev thauj khoom IEC 60076-7 raws li kev ua haujlwm ntawm cua kub- qhov chaw kub thiab noo noo. Thaum tus neeg yuav khoom sib piv cov khoom, qhov sib txawv ntawm qhov tseem ceeb tsis tshua muaj qhov ntsuas kVA - lawv yog cov ntaub ntawv rwb thaiv tsev, qhov ntsuas kub nce siab, tswj cov dej noo thaum ua, thiab cov kev ntsuam xyuas uas ua pov thawj tias chav tsev tau tsim thiab qhuav kom raug.
GNEE Hoobkas pem teb showcasing kev sib dhos ntawm 750 kVA faib transformers.
Cov Cheebtsam ntawm Cov Hluav Taws Xob Hluav Taws Xob hauv 750 kVA Unit
Cov txheej txheem rwb thaiv tsev ntawm cov kua dej-immersed tis transformer muab cov kua dielectric (cov roj) nrog cov khoom dielectric (daim ntawv, pressboard thiab lwm yam khoom siv cellulose). Cov roj ua haujlwm ob zaug ib zaug - hluav taws xob rwb thaiv tsev thiab cua txias - thaum cov khoom siv tau muab kev txhawb nqa thiab kev cuam tshuam tseem ceeb ntawm cov conductors ntawm qhov sib txawv.
| Cheebtsam | Khoom siv | Muaj nuj nqi | Yam khoom / sau ntawv |
|---|---|---|---|
| Insulating roj | Naphthenic ntxhia roj (IEC 60296) | Kua dielectric ntawm theem thiab rau hauv av; txias nruab nrab | Kev tawg hluav taws xob ntawm cov roj tshiab ua tiav feem ntau yog 60 kV lossis ntau dua hla qhov sib txawv 2.5 hli (kev lees paub rau IEC 60296 thiab kev yuav khoom tshwj xeeb); dej cov ntsiab lus tuav tsawg thaum ua |
| Tus neeg xyuas pib qhwv | Thermally upgraded Kraft daim ntawv | Tig-rau-tig thiab txheej- mus rau- txheej rwb thaiv tsev ntawm windings | High dielectric zog, tsis muaj noo noo khaws; thermal upgrading slows aging ntawm kub dua |
| Khoom thaiv | Ua ntej- compressed pressboard | Lub ntsiab rwb thaiv tsev ntawm HV thiab LV windings thiab rau hauv av | Dimensional stability thiab mechanical zog nyob rau hauv clamping siab; yuav tsum yog roj puv -impregnated |
| Txheej rwb thaiv tsev | Daim ntawv los yog pressboard strips ntawm winding txheej | Distributes inter-layer voltage stress sib npaug | Thickness thiab tus naj npawb ntawm cov khaubncaws sab nraud povtseg ua raws li qib rwb thaiv tsev ntawm chav tsev |
| Lead thiab terminal rwb thaiv tsev | Daim ntawv- qhwv cov hlau lead nrog creepage barriers | Nqa cov kev sib txuas winding los ntawm coil mus rau bushing yam xyuam xim | Txoj kev Creepage thiab clearance loj rau qhov system voltage |
| Bushings | Porcelain los yog composite vaj tse, roj- sau los yog cob-impregnated ntawv (RIP) rwb thaiv tsev | Nqa HV thiab LV conductors los ntawm phab ntsa tank | Sab nraud creepage nrug sib npaug rau cov pa phem ntawm qhov chaw |
| Impregnation | Roj impregnation nyob rau hauv lub tshuab nqus tsev | Fills voids nyob rau hauv cov khoom rwb thaiv tsev | Voids sab laug unfilled ua qhov chaw ntawm ib nrab tso tawm |
Cov txheej txheem txheej txheem tseem ceeb npaum li qhov kev xaiv cov khoom siv. Cov roj tshiab yog degassed thiab lub cev qhuav dej hauv lub tshuab nqus tsev ua ntej txhaj tshuaj; lub winding thiab cov tub ntxhais sib dhos yog qhuav kom cov dej seem hauv daim ntawv nyob qis. Cov dej hauv cov roj raug saib xyuas tawm tsam cov kev taw qhia ntawm IEC 60422 - lub hom phiaj ua haujlwm rau kev faib khoom - chav tsev yog qis dua li 20 mg / kg hauv cov roj tshiab. Cov dej noo txo qis qhov tawg ntawm cov roj thiab ua kom cov ntawv aging, uas yog vim li cas lub voj voog ziab yog ib qho ntawm cov kauj ruam saib xyuas hauv lub hoobkas.
Cov chav kawm rwb thaiv tsev thiab qhov kub thiab txias -Rise Limits
Ob tug lej tsis meej pem nyob rau hauv kev sib tham ntawm transformer: cov khoom siv thermal thiab kub -nce txwv. Lawv yog cov khoom sib txawv, thiab qhov sib txawv tseem ceeb rau kev qhia tshwj xeeb thiab kev ua haujlwm.
| Parameter | Tus nqi | Hauv paus |
|---|---|---|
| Rwb thaiv tsev thermal class (khoom siv) | Chav kawm A - 105℃siab tshaj qhov kub tsis tu ncua- qhov kub ntawm cov khoom | IEC 60085: Ua |
| Siv qhov kub thiab txias | 40 degree | IEC 60076-2: Cov |
| Winding nruab nrab kub -nce txwv | 65 K | IEC 60076-2: Cov |
| Sab saum toj -roj kub- nce txwv | 60 K | IEC 60076-2: Cov |
| Hottest - qhov kub thiab txias - nce tso nyiaj | 78 K | IEC 60076-2: Cov |
| Optional txo nce (poob-tso tawm designs) | 55K winding nruab nrab (piv txwv li muab tus nqi) | Kev xaiv chaw tsim khoom, tsis yog tus qauv yuav tsum tau ua |
Ntawm tus qauv 40℃ambient, 65 K qhov nruab nrab nce siab ua rau qhov nruab nrab cua txias ntawm 105℃- tib daim duab raws li Class A ntsuas. Qhov coincidence yog vim li cas ob tus lej feem ntau sib xyaw ua ke. Qhov kub tshaj plaws zaum siab tshaj qhov nruab nrab winding; 78 K nyiaj pub dawb hauv IEC 60076-2 npog qhov gradient ntawm qhov nruab nrab thiab qhov kub tshaj plaws. Hauv lwm lo lus: 105℃yog dab tsi tsev neeg cov khoom raug ntsuas los tiv thaiv, 65 K yog ntau npaum li cas qhov cua tuaj yeem nce siab tshaj 40℃ambient, thiab ob qho tib si sib npaug ntawm tus lej ntawm cov qauv.
Rau cov haujlwm xa tawm hauv Suav teb lossis rau Suav specifications, ob daim ntawv ntxiv tseem ceeb. GB/T 6451 teeb tsa cov kev ntsuas tsis zoo thiab cov nqi poob rau cov roj-immersed fais fab transformers ntawm chav kawm 10 kV, npog qhov ntsuas 750 kVA. GB 20052-2020 txhais peb lub zog-qib kev ua tau zoo; qhov tsis muaj kev thauj khoom thiab thauj khoom poob ntawm 750 kVA chav tsev raug xaiv raws li qib uas yuav tsum tau ua los ntawm lub khw muag khoom thiab nws txoj kev txhawb nqa.
Rwb thaiv tsev Test: Hoobkas pov thawj thiab nyob rau hauv -Kev saib xyuas
Kev rwb thaiv tsev zoo tsis pom los ntawm sab nraud, yog li nws yuav tsum tau ua kom pom los ntawm kev sim. Txhua 750 kVA chav tsev tawm ntawm lub Hoobkas nrog daim ntawv tshaj tawm kev xeem niaj hnub; Cov lej txiav txim siab dielectric ua raws IEC 60076-3.
Dielectric niaj hnub xeem
- Rwb thaiv tsev tsis kam (megger).Ntsuas ntawm windings thiab rau hauv av nrog 2.5 kV lossis 5 kV rwb thaiv tsev tester. Ib qho kev lees paub zoo rau chav kawm 10 kV yog 100 MΩ lossis ntau dua ntawm 20 degree; qhov polarization Performance index (10-feeb nyeem ntawv faib los ntawm 1-feeb nyeem ntawv) feem ntau yuav tsum ncav cuag 1.5–2.0. Cov no yog cov txheej txheem kev ua haujlwm - cov txiaj ntsig ntawm kev sib khi yog los ntawm chav tsev cov ntaub ntawv kuaj xyuas thiab kev yuav khoom tshwj xeeb.
- Dielectric dissipation factor (tan δ).Ntsuas nrog tus choj ntawm lub zog zaus, feem ntau ntawm 10 kV rau chav kawm 10 kV. Ib chav tshiab feem ntau pom tan δ hauv qab li 0.5% ntawm 20 degree; Cov kev txwv tau teev nyob rau hauv cov kev qhia tshwj xeeb, thiab kev nce qib hauv xyoo yog qhov muaj txiaj ntsig ntau dua li kev nyeem ib zaug.
- Lub zog- zaus tiv thaiv kev sim.Rau chav kawm 10 kV (qhov hluav taws xob siab tshaj plaws rau cov khoom siv Um= 12 kV), qhov luv -ntev siv sijhawm-voltage test yog 28 kV rms rau 60 vib nas this ib IEC 60076-3.
- xob laim impulse test.Tib chav tsev raug txheeb xyuas nrog 1.2/50 µs puv -vave impulse ntawm 75 kV ncov ib IEC 60076-3, siv rau cov kab terminals.
- Induced voltage xeem.Txheeb xyuas qhov inter-tig thiab inter- txheej rwb thaiv tsev los ntawm kev nce qhov voltage ntawm theem, raws li IEC 60076-3.
- Kub-nce thiab luv- Circuit Court withstand yog hom kev ntsuam xyuas (IEC 60076-2 thiab IEC 60076-5), ua rau ntawm ib pawg neeg sawv cev ntawm tus qauv tsim ntau dua li ntawm txhua daim. Daim ntawv pov thawj hom kev ntsuas rau qhov ntsuas kub nce siab yog cov ntaub ntawv uas txuas rau 65 K tsim txwv rau kev muaj tiag.
Dissolved gas tsom xam (DGA)
Thaum lub transformer yog nyob rau hauv kev pab cuam, cov roj nws tus kheej ua tus saib xyuas. Hluav taws xob thiab thermal faults decompose cov roj thiab cov ntawv rau hauv cov yam ntxwv gases uas yaj nyob rau hauv cov roj; cov qauv roj ib ntus, soj ntsuam los ntawm cov pa roj chromatography, qhia tias hom kev ua txhaum twg tab tom txhim kho ntev ua ntej qhov ua tsis tiav. Kev txhais lus ua raws li IEC 60599 rau cov ntxhia- roj- cov khoom siv puv thiab IEEE C57.104 rau kev ntsuas kev taw qhia.
| Cov roj tseem ceeb tau kuaj pom | Fault type qhia |
|---|---|
| H2(nrog qee tus CH4) | Ib nrab tso tawm / corona |
| CH4nrog C2H6 | Tsawg- qhov kub thiab txias ntawm cov roj (hauv qab li 300 degree) |
| C2H4(nrog CH4, C2H6) | Thermal txhaum ntawm cov roj nyob rau hauv 300-700℃ntau yam - overheating ntawm conductors los yog kev twb kev txuas |
| C2H2(nrog H2) | Arcing - siab- lub zog hluav taws xob tawm |
| CO and CO2 | Thermal degradation ntawm daim ntawv / cellulose rwb thaiv tsev |
Ib qho kev coj ua yog cov qauv roj txhua xyoo, nrog lub sijhawm luv dua tom qab muaj xwm txheej xws li dhau los ntawm - txhaum, xob laim tawm tsam, lossis lub sijhawm ntawm kev thauj khoom ntau dhau. DGA yog qhov tso cai rau kev saib xyuas tsis yog hloov pauv thaum muaj xwm txheej ceev - cov pa roj sib piv muab cov yam tsis raug, thiab tus nqi hloov pauv muab qhov ceev.
Xaus: Vim Li Cas Xaiv GNEE rau Koj Cov Kev Xav Tau Lub Hwj Chim?
Covrwb thaiv tsev tsim thiab thermal stability ntawm 750 kVA roj immersed tis transformersyog ob qho tseem ceeb tshaj plaws hauv kev txiav txim siab koj cov nyiaj rov qab los ntawm kev nqis peev. Los ntawm xaiv GNEE, koj koom tes nrog atransformer chaw tsim tshuaj pausuas yog qhov tseem ceeb ntawm kev ua haujlwm siab, siab - cov ntaub ntawv qib siab, thiab kev sim nruj. Peb cov transformers muab tus nqi qis dua ntawm cov tswv cuab los ntawm kev txo qis zog thiab kev saib xyuas tsawg kawg nkaus.
Koj puas tau npaj kom ruaj ntseg koj lub zog hluav taws xob?Tsis txhob khom rau "tus qauv" thaum koj tuaj yeem muaj "superior."Hu rau GNEE hnub no kom tau txais cov lus qhia ntxaws ntxaws thiab cov lus sib tw ntawm peb750 kVA roj immersed faib transformers.Peb pab neeg ntawm engineers sawv los pab koj kho cov kev daws teeb meem zoo tshaj plaws rau koj qhov project.
FAQ
Q1. Qhov ntsuas kub li cas -nce txwv rau 750 kVA roj-immersed transformer?
Raws li IEC 60076-2, rau Class A insulated kua-immersed units ntawm 40℃ambient: winding nruab nrab nce 65 K, sab saum toj-roj nce 60 K, kub tshaj plaws -spot allowance 78 K. Poob-txo cov qauv yuav raug muab 5 K, piv txwv li qis dua
Q2. Puas yog "Class A" txhais tau tias lub tshuab hloov pauv tuaj yeem khiav ntawm 105 degree?
Tsis yog . 105℃yog cov chav kawm thermal ntawm cov khoom siv insulating ib IEC 60085 - qhov kub thiab txias siab tshaj plaws uas tsev neeg cov khoom raug ntsuas rau. Cov kev txwv kev khiav hauj lwm yog qhia raws li qhov kub thiab txiassawvsaum toj no ambient: 65 K nruab nrab. Ntawm 40℃ambient, qhov nruab nrab winding zaum ze 105℃thiab qhov kub qhov chaw siab dua, yog li daim duab 105℃thiab 65 K nce piav qhia tib qhov tsim qauv hauv ob chav sib txawv.
Q3. Vim li cas kev tswj cov dej noo tseem ceeb heev rau kev rwb thaiv tsev transformer?
Dej txo qis qhov tawg ntawm cov roj thiab ua kom cov ntaub ntawv rwb thaiv tsev ntau dua -fold ntawm tib qhov kub. Nws yog tswj hwm ntawm kev ua haujlwm (degassing thiab lub cev qhuav dej hauv lub tshuab nqus tsev, nrog lub hom phiaj hauv qab li 20 mg / kg dej hauv cov roj tshiab) thiab saib xyuas hauv kev pabcuam raws li kev taw qhia ntawm IEC 60422, txhawb nqa los ntawm cov roj-kev txuag.
Q4. Cov kev ntsuam xyuas twg ua pov thawj qhov rwb thaiv tsev zoo ntawm chav tsev tshiab?
Cov kev ntsuam xyuas niaj hnub dielectric: rwb thaiv tsev tsis kam thiab polarization Performance index, tan δ, lub zog- zaus tiv taus (28 kV rau chav kawm 10 kV), xob laim impulse (75 kV), thiab qhov ntsuas hluav taws xob induced - tag nrho ib IEC 60076-3. IEC 60076-2 Kev ntsuas kub-nce hom kev ntsuas rau ib qho kev ntsuas qhov ntsuas cua sov ntawm tus neeg sawv cev.
Q5. Dab tsi tuaj yeem cuam tshuam cov pa roj qhia rau peb?
DGA txheeb xyuas qhov ua txhaum ntawm kev tsim kho hauv lub tank: hydrogen qhia txog kev tso tawm ib nrab, ethylene qhia thermal overheating ntawm cov roj, acetylene qhia arcing, thiab carbon oxides qhia ntawv degradation (IEC 60599 / IEEE C57.104). Trending cov pa concentrations qhia sai npaum li cas qhov txhaum loj hlob tuaj.
Q6. Lub neej kev pab cuam dab tsi tuaj yeem xav tau los ntawm 750 kVA faib transformer?
Distribution transformers feem ntau yog tsim los rau 20 mus rau 30 xyoo. Lub neej tiag tiag nyob ntawm qhov chaw thauj khoom, qhov kub thiab txias, tswj kev ya raws, kev saib xyuas zoo, thiab ntau npaum li cas lub tsev tau ua haujlwm siab tshaj nws qhov ntsuas kub - qhov kub thiab txias - tus qauv laus ntawm IEC 60076-7 quantifies that trade-off.