Insulator maintenance is a key issue in all power sectors. In China, contamination removal and detection of the flashover of disc-shaped porcelain insulators are the two most concerned issues.
Raws li Tuam Tshoj' cov kev cai cuam tshuam tam sim no, hauv thaj chaw muaj kuab paug me me, cov khoom siv porcelain thiab iav insulators yuav tsum tau ntxuav tsawg kawg ib xyoos ib zaug; nyob rau hauv cov cheeb tsam uas muaj kuab heev, nws yuav tsum tau ntxuav lawv ob zaug ib xyoos. Hauv feem ntau ntawm Tuam Tshoj, dej nag feem ntau yog nyob rau lub caij ntuj sov, thiab cov pa phem yog tsim thaum kawg ntawm lub caij nplooj zeeg thiab lub caij nplooj ntoos hlav tom ntej. Yog li ntawd, flashover xwm txheej tshwm sim los ntawm cov pa phem feem ntau tshwm sim thaum lub caij ntuj no pos huab. Qhov no txhais tau hais tias lub sijhawm zoo tshaj plaws los ntxuav cov insulators feem ntau kuj yog lub caij ntuj no.
Feem ntau, kev ntxuav cov insulators ntawm cov kab sib txuas hauv Suav teb yog ua manually. Rau cov neeg ua haujlwm tu kab, qhov no yog ib qho kev ua haujlwm nyuaj, thiab nws tsis yog qhov xav tsis thoob tias qhov kev tu kom zoo yog feem ntau tsis txaus siab. Tab sis qhov teeb meem nyuaj dua yog tias feem ntau, tsis muaj lub sijhawm los npaj kev tawm tsam rau lub sijhawm siv sijhawm thiab siv zog ua haujlwm tu.
Cov kev cai tseem tau teev tseg tias lub flashover ntawm lub disc ncua kev kawm ntawv yuav tsum raug tshuaj xyuas txhua ob xyoos. Cov iav insulators puas tuaj yeem pom tau yooj yim pom los ntawm hauv av. Qhov txiaj ntsig no tau txais tos los ntawm cov khoom siv hluav taws xob. Txawm li cas los xij, yog tias cov iav insulators siv rau cov kab sib kis, kev ntxuav phau ntawv tsis tuaj yeem zam hauv cov cheeb tsam uas cuam tshuam los ntawm cov pa phem. Tuam Tshoj' cov cai yav dhau los tau teev tseg tias cov iav insulators thiab iav insulators yuav tsum tau ntxuav manually, txawm hais tias txoj cai no tau raug thuam ntau xyoo vim muaj ntau yam teeb meem.
Rau cov laj thawj saum toj no, cov khoom siv hluav taws xob sib xyaw tau dhau los ua ntau hom kab sib txuas uas twb muaj lawm thiab tsim tshiab nyob rau hauv thaj chaw muaj kab mob hauv Suav teb. Vim tias lawv cov hydrophobic txav mus los, lawv tau ua tiav zam cov pa phem flashover uas feem ntau tshwm sim ntawm cov plooj (porcelain insulators) thiab iav insulators. Raws li tsis muaj flashover ntxiv, qhov nyuaj tu thiab tu ua haujlwm ntawm cov kab no thaum kawg tuaj yeem raug tshem tawm. Kev paub hauv cheeb tsam no tau dhau los rau nees nkaum xyoo.
Hauv Suav teb, kev siv cov pas nrig ntev sib xyaw ua ke kuj tseem cuam tshuam rau lwm txoj hauv kev txij nkawm. Nyob rau hauv cov kab uas siv composite insulator, tsis tsuas yog tsis muaj kev cai ntxiv rau kev tu, tab sis tsis tas yuav tsum tau kuaj xyuas qhov tawg ntawm insulators; tab sis muaj cov kev cai rau yav dhau los disc ncua kev kawm ntawv insulators. Ntawm cov teeb meem tshiab tau ntsib los ntawm cov khoom siv hluav taws xob sib xyaw, qhov loj tshaj plaws yog qhov sib cuam tshuam ntawm lub kaus tiab thiab cov tub ntxhais qws lossis cov nkig tawg ntawm cov tub ntxhais qws, uas tsuas yog tshwm sim hauv ob peb kis. Tsis tas li ntawd, qhov kev daws teeb meem zoo tshaj plaws rau qhov teeb meem no yog txhawm rau txhim kho kev sib raug zoo ntawm kev sib txuas thaum lub sij hawm tsim khoom, tsis yog kev tshawb nrhiav thaum ntxov ntawm cov kev ua tsis tiav hauv lub tshav pob (txawm tias nyob rau hauv txoj cai nws tuaj yeem pom los ntawm txoj kev faib hluav taws xob) .
Txij li thaum ob qho tseem ceeb ntawm kev saib xyuas yav dhau los tau raug tshem tawm, cov khoom siv silicone roj hmab insulator thov tias lawv cov khoom yog" kev tu-dawb." Txawm li cas los xij, rau cov insulators, tsis muaj kev saib xyuas yog tsis yooj yim sua. Ua ntej, piv nrog cov porcelain insulators lossis iav insulators, tiam tshiab ntawm insulators tsis muaj kev ua haujlwm ntau. Txawm hais tias saib xyuas cov kev hloov pauv hauv kev ua haujlwm lossis cov ntaub ntawv kev ua haujlwm, qee qhov kev saib xyuas tseem yuav tsum tau ua.
Cov lus pom zoo tsim los ntawm cov tsev kawm ntawv qib siab uas cuam tshuam nrog qhov teeb meem no tuaj yeem hu ua" kev tu raws li cov qauv ntsuas." Cov txheej txheem yog raws li hauv qab no: 5 mus rau 8 xyoo tom qab cov khoom siv insulator muab tso rau hauv kev ua haujlwm, tsis tas yuav tshuaj xyuas nws. Yog li ntawd, lub sijhawm no tuaj yeem hu ua thawj lub sijhawm tsis muaj kev saib xyuas. Lub sijhawm ntev ntawm lub sijhawm no yuav nyob ntawm qhov chaw ib puag ncig thiab kev paub zoo thiab kev ntseeg siab ntawm cov insulator, uas yog raws li cov kev paub dhau los ntawm cov chaw tsim khoom insulator.
Tom qab ntawd, tom qab qhov kawg ntawm thawj lub sijhawm txij nkawm-dawb, ntau lub insulators raug coj los ntawm cov kab raws li cov qauv, thiab cov kev ntsuam xyuas hydrophobicity thiab cumulative pollution level tests tau ua nyob rau hauv lub chaw soj nstuam, nrog rau kev kuaj xyuas hluav taws xob thiab kev ua haujlwm.
Ntawm qhov tod tes, yog tias qhov kev ntsuam xyuas ntawm cov qauv insulator tom qab thawj zaug txij nkawm tsis ua raws li qhov yuav tsum tau ua (piv txwv li, hydrophobicity yog txo qis, qhov pom tseeb kev laus tshwm sim los yog lub zog txhua yam txo qis), qhov thib ob txij nkawm- lub sijhawm pub dawb yuav tsum luv dua thawj zaug. Tsis tas li ntawd, rau cov insulators muaj kev txhawj xeeb, kev ntsuas infrared thiab ultraviolet tuaj yeem raug ntxiv. Txoj kev saib xyuas hauv online uas tsis muaj kev puas tsuaj no tuaj yeem suav tias yog ib qho ntxiv rau" lus qhia.
In some provinces of China, power companies have sufficient experience in operating silicone rubber insulators. The first free maintenance period has now been extended to 8 to 10 years, and the second maintenance free period is 6 to 8 years. It should be emphasized that the production quality of insulators must be strictly monitored and guaranteed, and attention must be paid to prevent them from being damaged during storage, transportation or installation. The above "maintenance based on sampling results" recommendations only apply to insulators that meet these requirements.