Roj Immersed Transformers Fault Analysis
Rwb thaiv tsev degradation: Hauv 10 xyoo dhau los, rwb thaiv tsev degradation yog qhov thib ob ua rau kev ua tsis tiav. Vim qhov kev puas tsuaj ntawm cov rwb thaiv tsev, qhov nruab nrab lub neej ntawm cov roj-immersed transformers yog 17.8 xyoo, uas yog deb tshaj qhov kwv yees lub neej ntawm 35-40 xyoo. Qhov nruab nrab lub neej ntawm cov roj-immersed transformer nyob rau hauv 1983 thaum nws ua tsis tau tejyam yog 20 xyoo.
Kab inflow: Ntawm tag nrho cov yam uas ua rau roj-immersed transformer tsis ua hauj lwm, kab inflow (los yog kab teeb meem) yog qhov tseem ceeb tshaj plaws. Hom no suav nrog kev faib hluav taws xob (TD) tsis zoo xws li kev ua haujlwm tsis raug, kev sib txuas ntawm cov roj-immersed transformers, lead arcs ntawm splitter keyboards, thiab lwm yam., tsav tsheb overvoltages, ncov voltages, kab faults / flash teeb, thiab lwm yam. Muaj cov khub tsis raug.
Kev Ua Phem / Kev Tsim Khoom: Hauv kev kawm, tsuas yog ib feem ntawm kev ua tsis tiav tau tshwm sim los ntawm cov txheej txheem lossis kev tsim khoom tsis raug. Piv txwv li, muaj qhov xoob xoob thiab qhov muaj los yog tsis muaj kev txhawb nqa, xoob cushions, vuam tsis zoo, cov tub ntxhais tsis zoo rwb thaiv tsev, lub zog luv luv tsis txaus, cov khoom txawv teb chaws hauv lub tank, thiab lwm yam.
Kev saib xyuas tsis txaus: Kev saib xyuas tsis txaus yog suav tias yog qhov laj thawj thib plaub ntawm kev tsis ua haujlwm ntawm cov roj hloov pauv. Cov tsiaj no muaj cov cuab yeej tiv thaiv tsis raug cai, cov khoom siv tsis muaj roj rau hauv lub tshuab hluav taws xob, cov dej xau, av, corrosion.
Overload: Hom kev ua txhaum no suav nrog cov kev ua txhaum uas pom tias yog overloads thiab tsuas yog hais txog cov roj immersed transformers hauv cov tsheb me me uas ua haujlwm dhau lub npe lub zog rau lub sijhawm ntev. Overload feem ntau tshwm sim thaum lub load ntawm cov chaw nres tsheb fais fab thiab cov tuam txhab hluav taws xob txuas ntxiv mus qeeb. Thaum kawg, cov roj-immersed transformer yuav ua rau ntxov ntxov laus ntawm cov rwb thaiv tsev vim kev ua haujlwm dhau, thiab qhov kub thiab txias dhau lawm. Yog hais tias lub insulating board ntawm cov roj-immersed transformer deteriorates, lub zog insulating ntawm daim ntawv insulating yuav txo. Vim li no, kev rwb thaiv tsev tawg tshwm sim vim qhov cuam tshuam ntawm kev tsis ua haujlwm sab nraud, uas dhau los ua qhov ua rau tsis ua haujlwm.
xob laim tawm tsam: Raws li kev hloov pauv hauv kev faib tawm, muaj tshwm sim tsawg dua xob laim tawm tsam dua li cov kev tshawb fawb yav dhau los. Tam sim no, tsuav yog nws tsis yog ib qho kev sib tsoo pom tseeb, qhov kev cuam tshuam dav dav yog cais raws li inrush tam sim no ntawm kab.
Peb-theem load imbalance: vim yog peb-theem load imbalance, lub sij hawm ntev overload tshwm sim, thiab kub siab heev, ua rau rwb thaiv tsev deterioration, ua rau luv luv Circuit Court ntawm coils los yog luv luv Circuit Court ntawm theem.
Kev Sib Txuas Slack: Kev sib txuas slack kuj tuaj yeem nkag mus rau hauv qhov chaw tsis tu ncua, txawm li cas los xij, vim tias cov ntaub ntawv txaus tuaj yeem sib cais sib cais, tsis zoo li cov kev tshawb fawb yav dhau los. Qhov no suav nrog cov txheej txheem tsim khoom thiab kev saib xyuas kev sib txuas hluav taws xob. Ib qho teeb meem yog tias, txawm hais tias qhov tshwm sim no tau txo qis hauv xyoo tas los no, muaj qhov tsis tsim nyog faib cov hlau ntawm cov khoom sib txawv. Lwm qhov teeb meem yog kev nruj nruj ntawm kev sib txuas bolted.
