220kV Transformer Inter-Coil Main Insulation Gap: Kev Tshawb Fawb Txog Hluav Taws Xob thiab Cov Tswv Yim Txhim Kho

Kev Taw Qhia

Hauv thaj chaw ntawm kev xa hluav taws xob siab, 220kV transformers ua lub luag haujlwm tseem ceeb hauv kev ua kom muaj kev faib hluav taws xob zoo. qhov sib txawv ntawm kev rwb thaiv tsev tseem ceebNruab nrab ntawm cov xov hluav taws xob transformer yog ib qho ntawm cov qauv tsim tseem ceeb tshaj plaws, cuam tshuam ncaj qha rau kev ntseeg tau ntawm transformer, lub neej ntev, thiab kev ua tau zoo. Raws li cov thawj coj ua lag luam hauv kev siv tshuab transformer, peb lees paub tias kev tsim cov khoom rwb thaiv tsev zoo tshaj plaws yog qhov tseem ceeb rau kev tiv taus kev ntxhov siab hluav taws xob hnyav, suav nrog kev ua haujlwm tas mus li, xob laim, thiab kev hloov pauv surges.

Tsab xov xwm no tshawb nrhiav cov txheej txheem tshuaj xyuas hluav taws xob zoo heev thiab cov tswv yim txhim kho rau 220kV transformer inter-coil main insulation gaps. Los ntawm kev siv cov thev naus laus zis simulation siab heev thiab cov ntsiab cai tsim tshiab, peb tuaj yeem txhim kho kev ua haujlwm rwb thaiv tsev transformer, kom ntseeg tau tias kev ua haujlwm zoo tshaj plaws hauv qhov chaw xav tau tshaj plaws.

Cov Ntsiab Lus Tseem Ceeb ntawm Kev Rwb Thaiv Hluav Taws Xob Hauv 220kV Transformers

Qhov sib txawv ntawm cov xov hlau hauv 220kV transformers ua haujlwm ua lub dielectric barrier tseem ceeb, tiv thaiv kev tawg hluav taws xob ntawm cov kauj hluav taws xob siab thiab qis. Lub kaw lus rwb thaiv tsev no yuav tsum tsis yog tsuas yog ua haujlwm ib txwm xwb tab sis kuj tseem muaj ntau yam cov xwm txheej overvoltageuas tshwm sim thaum lub sijhawm teeb meem ntawm lub grid.

Hauv 220kV daim ntawv thov, qhov sib txawv ntawm rwb thaiv tsev feem ntau siv a ntau lub kaw lus thaivmuaj cov thooj voos kheej kheej lossis cov ntaub qhwv uas faib qhov sib txawv ua ntau lub raj xa roj me me. Txoj hauv kev no ua rau muaj txiaj ntsig zoo dua qhov hluav taws xob pib tawm ib nrab(PDIV) thiab tiv thaiv kev tsim cov choj conductive impurity ntawm cov windings. Tus qauv tsim tseem ceeb ua raws li "lub raj ntawv nyias nyias, qhov sib txawv roj me me", qhov twg cov ntawv xovxwm feem ntau yog 2 hli tuab, thiab qhov sib txawv roj ntawm cov teeb meem ntau ntawm 6-10 hli.

Qhov kev faib tawm ntawm lub zog hluav taws xob hauv cov qhov sib txawv no yog txhua yam tab sis sib xws, nrog kev ntxhov siab ntau ntxivtshwm sim ntawm cov npoo winding, cov kab nkhaus ntawm tus neeg xyuas pib, thiab cov chaw sib txuas rwb thaiv tsev. Yog tsis muaj kev tsim qauv zoo, cov chaw muaj kev ntxhov siab siab no tuaj yeem pib ua haujlwm tso tawm ib feem, ua rau kev puas tsuaj ntawm rwb thaiv tsev thiab ua rau tsis ua haujlwm.

Cov Txuj Ci Tshawb Fawb Txog Hluav Taws Xob

Kev Ua Qauv Finite Element (FEM)

Kev tsim cov khoom siv rwb thaiv tsev niaj hnub no vam khom ntau rau kev tshuaj xyuas cov ntsiab lus kawg(FEA) rau kev kos duab hluav taws xob kom meej. Los ntawm kev faib cov qauv rwb thaiv tsev ua ntau txhiab yam khoom sib cais, FEM tuaj yeem xam tau kev faib tawm uas muaj peev xwm ua tauthiab lub zog tebnrog qhov tseeb zoo kawg nkaus. Rau 220kV transformers, qhov kev tshuaj xyuas no feem ntau tsom mus rau peb thaj chaw tseem ceeb: tus rwb thaiv tsev sab saud, nruab nrab ntawm cov windings, thiab kev rwb thaiv tsev qis dua.

Peb cov kev sim ua qauv qhia tau hais tias qhov siab tshaj plaws ntawm lub zog hluav taws xob hauv 220kV transformers feem ntau tshwm sim ntawm cov ces kaum sab hauvntawm cov xov hluav taws xob siab, tshwj xeeb tshaj yog nyob ze ntawm cov ntu kawg ntawm kab. Thaum lub sijhawm sim xob laim (1050kV rau 220kV systems), cov cheeb tsam no tuaj yeem ntsib lub zog ntawm lub zog ntau dua 8-9kV / hli, mus txog qhov txwv ntawm cov khoom siv rwb thaiv tsev.

Kev Txheeb Xyuas Cov Cheeb Tsam Kev Nyuaj Siab Tseem Ceeb

Los ntawm kev tshuaj xyuas cov hluav taws xob dav dav, peb tau txheeb xyuas ntau thaj chaw ntxhov siab tseem ceeb uas xav tau kev saib xyuas tshwj xeeb hauv 220kV transformers:

• Cov cheeb tsam ntug winding: Cov ces kaum ntse ntse ntawm qhov kawg ntawm cov xov hlau tsim cov kev sib sau ua ke ntawm thaj chaw, uas yuav tsum tau siv cov txheej txheem tshwj xeeb los ntsuas qib.
• Kev sib txuas ntawm cov khoom khov thiab cov kua rwb thaiv tsevCov khoom sib txawv ntawm dielectric ntawm lub rooj tsavxwm thiab roj ua rau muaj kev sib zog ua kom muaj zog ntawm lawv qhov interfaces.
• Cov chaw tawm musCov chaw hloov pauv uas cov xov hluav taws xob siab tawm ntawm cov windings ua rau muaj kev faib tawm teb nyuaj tshwj xeeb uas xav tau kev tshuaj xyuas peb sab.

Rau cov transformers 220kV, lub zog hluav taws xob siab tshaj plaws feem ntau tshwm sim hauv ob peb lub discs thawj zaug ze ntawm qhov kawg ntawm kab thiab ntawm qhov chaw sib tshuam ntawm cov discs interleaved thiab cov discs ib txwm thaum lub sijhawm impulse. Cov cheeb tsam no xav tau kev ntsuas rwb thaiv tsev zoo dua kom tiv thaiv kev ua tsis tiav ua ntej lub sijhawm.

Cov Tswv Yim Txhim Kho Rau Cov Qhov Sib Txawv ntawm Kev Rwb Thaiv Tsev

Kev Txhim Kho Geometric

Kev tsim cov electrodesawv cev rau ib qho ntawm cov tswv yim zoo tshaj plaws rau kev txhim kho kev faib tawm ntawm thaj chaw. Los ntawm kev hloov cov ces kaum ntse nrog cov duab nkhausthiab kev siv cov electrodes toroidal, peb tuaj yeem txo qhov siab tshaj plaws ntawm lub zog teb los ntawm 30-40%. Rau 220kV transformers, qhov no suav nrog:

• Cov nplhaib kawg zoo li qub(SER) ntawm cov davhlau ya nyob twg los tsim cov gradients du thiab muaj peev xwm.
• Lub kaum sab xisnrog cov qauv uas kwv yees li cov kab sib npaug, txo cov kev ntxhov siab tangential raws cov nplaim ntawm lub rooj tsavxwm.
• Cov khoom siv ua kom ntxhov siabntawm cov interfaces tseem ceeb los tswj kev sib txawv ntawm thaj teb thiab txo cov concentration.

Qhov radius ntawm curvature optimization yog qhov tseem ceeb heev - kev nce lub ces kaum radius ntawm cov conductors thiab static rings tuaj yeem txo qhov kev ua kom muaj zog ntawm thaj chaw (lub zog ntawm thaj chaw ∝ 1 / radius).

Cov Khoom Siv Rwb Thaiv Tsev Zoo Tshaj Plaws

Kev xaiv cov khoom siv ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua haujlwm rwb thaiv tsev. Peb cov 220kV transformers siv:

• Rooj ntawv xovxwm ceev ceevnrog kev ruaj khov ntawm qhov ntev thiab lub zog dielectric siab dua.
• Cov ntawv kho kom zoo dua qubuas muaj kev ua haujlwm thermal zoo dua, tswj cov khoom dielectric ntawm qhov kub siab.
• Cov ntaub ntawv txhim kho Nanocompositeqhov twg nanoparticles (SiO₂, Al₂O₃) ntxiv rau epoxy lossis roj txhim kho lub zog dielectric los ntawm 20-30% thaum txhim kho thermal conductivity.

Cov ntaub ntawv zoo heev no ua rau cov qauv rwb thaiv tsev me dua thaum tseem tswj lossis txhim kho qhov kev ntseeg tau. Piv txwv li, kev siv cov txheej txheem rwb thaiv tsev nanocomposite tuaj yeem ua rau lub neej rwb thaiv tsev ntev dua 20-30% piv rau cov ntaub ntawv ib txwm muaj.

Kev Teeb tsa Lub Tshuab Rwb Thaiv Tsev

Kev kho kom zoo dua qhov kev npaj lub cev ntawm cov khoom rwb thaiv tsev ua rau muaj kev txhim kho zoo heev:

• Cov txheej txheem rwb thaiv tsev qibqhov twg cov rwb thaiv tsev tuab sib txawv raws li qhov hluav taws xob faib raws cov winding.
• Kev txhim kho qhov chaw thaivsiv FEM kev tshuaj xyuas los txiav txim siab qhov chaw zoo tshaj plaws ntawm lub rooj tsavxwm uas txo qhov kev ntxhov siab ntawm qhov sib txawv roj ntau tshaj plaws.
• Kev ntsuas qhov loj ntawm cov kav rojuas sib npaug qhov xav tau hluav taws xob (qhov sib txawv me dua rau PDIV siab dua) nrog rau qhov xav tau txias (cov roj ntws txaus).

Rau cov transformers 220kV, peb tau pom tias cov txheej txheem sib txuas ntawm cov xov pajnrog rau cov feem pua ​​sib txuas siab tshaj 65-70% txhim kho qhov kev faib hluav taws xob impulse, txo cov kev ntxhov siab ntawm thawj ob peb lub discs txog li 50% piv rau cov qauv tsim ib txwm muaj.

Kev Kawm Txog Cov Ntaub Ntawv: Kev Siv Tau Zoo Hauv 220kV Transformer

Peb qhov project tsis ntev los no uas muaj lub transformer 220kV high-impedance qhia tau tias cov tswv yim txhim kho no ua haujlwm tau zoo. Tus qauv tsim thawj zaug qhia tau tias muaj hluav taws xob ntau dhau (txog li 9.5kV/mm) nyob rau hauv qhov sib txawv ntawm cov xov hluav taws xob siab thiab qis, tshwj xeeb tshaj yog nyob ze ntawm qhov kawg ntawm cov xov hluav taws xob.

Los ntawm kev tshuaj xyuas FEM dua tshiab siv cov software tshwj xeeb (HSSSM), peb tau siv cov pob khoom txhim kho kom zoo:

1. Lub nplhaib electrostatic uas tau tsim dua tshiabnrog qhov curvature thiab qhov chaw zoo tshaj plaws.
2. Cov nplhaib ntxivntawm qhov kawg ntawm cov xov hlau kom faib cov roj ntim thiab txhim kho lub zog creepage.
3. Kev kho kom zoo dua ntawm kev thaiv teeb meemtsim cov qhov sib txawv roj me dua, sib xws dua (6-8 hli) es tsis txhob yog cov qhov sib txawv loj dua qub (12-15 hli).

Cov txiaj ntsig zoo kawg nkaus: lub zog siab tshaj plaws ntawm lub zog hluav taws xob tau txo qis mus rau 6.2kV / hli (kev txhim kho 35%), nrog rau kev faib tawm ntawm lub zog hluav taws xob sib npaug thoob plaws hauv cov qauv rwb thaiv tsev. Lub transformer hloov kho tau dhau txhua qhov kev sim niaj hnub thiab hom, suav nrog lub zog zaus nrog lub zog hluav taws xob (460kV rau 1 feeb) thiab xob laim (1050kV) kev sim, nrog rau qee qhov kev tso tawm tsis tu ncua hauv qab 10pC.

Kev Xav Txog Kev Tsim Khoom thiab Kev Zoo

Txawm tias tus qauv tsim zoo tshaj plaws los kuj tsis ua haujlwm yog tsis muaj kev tswj hwm kev tsim khoom zoo. Peb qhov kev pab cuam pov thawj zoo rau 220kV transformer rwb thaiv tsev suav nrog:

• Kev tswj cov txheej txheem suav lejthaum lub sijhawm tsim cov ntawv xovxwm thiab kev sib dhos ua ke.
• Kev ziab hauv lub tshuab nqus tsev thiab kev pleev rojcov txheej txheem uas ua kom tshem tawm tag nrho cov dej noo thiab cov pa roj uas yuav pib tso tawm ib nrab.
• Kev kos duab qhia txog kev tso tawm ib feemthaum lub sijhawm sim ua haujlwm kom paub thiab kho qhov tsis zoo ntawm kev tsim khoom.

Rau 220kV transformers, peb siv cov txheej txheem kev huv huv thaum lub sijhawm sib dhos winding thiab tanking, vim tias txawm tias cov pa phem me me tuaj yeem txo qhov muaj zog rwb thaiv tsev nyob rau hauv cov teb hluav taws xob siab.

Cov Qauv Yav Tom Ntej hauv Kev Siv Tshuab Rwb Thaiv Tsev

Kev hloov pauv ntawm transformer rwb thaiv tsev txuas ntxiv mus nrog ntau qhov kev txhim kho zoo:

• Kev siv tshuab digital twintsim cov qauv virtual ntawm cov txheej txheem rwb thaiv tsev rau kev saib xyuas kev ua haujlwm tiag tiag thiab kev txij nkawm kwv yees.
• Kev saib xyuas mob siab heevsiv cov khoom siv fiber optic uas tau muab tso rau hauv los taug qab cov haujlwm tso tawm ib nrab thiab cov chaw kub kub thoob plaws lub neej ua haujlwm ntawm lub transformer.
• Cov kua dej rwb thaiv tsev uas zoo rau ib puag ncigxws li cov esters ntuj muab cov ntsiab lus hluav taws kub dua thiab txhim kho kev sib raug zoo ntawm ib puag ncig thaum tswj kev ua haujlwm dielectric.

Rau cov ntawv thov 220kV, peb zoo siab heev txog cov ntawv thov kev kawm tshuabhauv kev tsim qauv rwb thaiv tsev kom zoo, qhov twg cov algorithms tuaj yeem soj ntsuam ntau txhiab tus qauv tsim kom paub txog cov kev teeb tsa zoo tshaj plaws uas sib npaug hluav taws xob, thermal, thiab kev lag luam.

Xaus lus

Kev kho kom zoo dua ntawm 220kV transformer inter-coil main insulation gaps yog ib qho kev sib tw engineering uas xav tau kev paub tob txog dielectric theory, advanced simulation capabilities, thiab kev txawj ntse hauv kev tsim khoom. Los ntawm kev tshuaj xyuas hluav taws xob thiab cov tswv yim txhim kho, peb tuaj yeem txhim kho kev ntseeg siab thiab lub neej ntev ntawm transformer.

Peb txoj kev qhia tau hais tias kev tsim cov khoom siv rwb thaiv tsev zoo tsis yog tsuas yog txhim kho kev ua haujlwm dielectric xwb tab sis kuj ua rau cov transformers me dua thiab pheej yig dua. Los ntawm kev siv cov txheej txheem siab heev no, peb xa cov transformers uas tshaj cov qauv kev lag luam thaum muab rau peb cov neeg siv khoom nrog kev ntseeg siab ua haujlwm zoo dua thiab tag nrho cov txiaj ntsig ntawm kev muaj.

Raws li thev naus laus zis txuas ntxiv mus, peb tseem cog lus tias yuav koom ua ke cov kev nce qib tshiab hauv kev tsim cov khoom siv rwb thaiv tsev, kom ntseeg tau tias peb cov neeg siv khoom tau txais txiaj ntsig los ntawm cov kev daws teeb meem transformer txhim khu kev qha thiab ua haujlwm tau zoo tshaj plaws muaj nyob hauv kev ua lag luam.

Tiv tauj peb pab neeg engineering hnub nolos tham txog seb peb cov kev txawj ntse tshwj xeeb tsim cov rwb thaiv tsev tuaj yeem txhim kho kev ua tau zoo thiab kev ntseeg siab ntawm koj cov haujlwm hloov pauv 220kV li cas.