Kev tshuaj xyuas xoom-Tus nqi thiab tawg-Txoj hlua tsis raug nyob rau hauv Porcelain Insulators

Mechanism ntawm Porcelain Insulator String Breakage

Rau cov plooj (porcelain insulators), qhov tsis xws luag xws li micro- tawg hauv lub taub hau insulator tso cai rau ya raws thaum lub sijhawm ua haujlwm, txo cov rwb thaiv tsev ntawm lub taub hau (ua rau "zero- tus nqi insulator"). Thaum cov hlua insulator ntsib ib qho flashover-vim los ntawm xob laim tawm tsam lossis lwm yam xwm txheej- txoj hauv kev tawm mus los ntawm lub taub hau insulator yog feem ntau ntawm lub zog. Qhov no tshwm sim vim hais tias qhov kev tiv thaiv ntawm lub taub hau yog qhov tsawg kawg nkaus piv rau qhov kev tiv thaiv siab heev ntawm txoj kev tawm mus thoob plaws hauv cov insulator sheds. Lub tshav kub generated los ntawm lub arc dhau los ntawm lub taub hau insulator ua rau lub insulator tawg, ua rau lub breakage ntawm lub insulator hlua.

Yog li, kev txhim kho ntawm xoom- tus nqi tsis raug yog qhov tseem ceeb uas ua rau cov kab hluav taws xob hluav taws xob tawg.

 

Ua rau Zero-Value Defects

① Cov rwb thaiv tsev tsis zoo

Kev puas tsuaj hauv cov txheej txheem tsim khoom ntawm cov cemented interface lossis qhov zoo ntawm cov khoom siv plooj (porcelain) nws tus kheej tuaj yeem ua rau muaj kev tsim ntawm xoom- tus nqi insulators.

Cov cemented interface ntawm cov plooj (porcelain insulator) muaj cov ntaub ntawv nrog cov coefficients sib txawv ntawm thermal expansion -tshwj xeeb porcelain, cement, thiab steel. Ib txheej tsis (feem ntau yog ua los ntawm asphalt lossis cov khoom zoo sib xws) feem ntau yog siv; Yog tias cov txheej txheem no nyias dhau los yog tsis tuaj yeem cuam tshuam nrog cov plooj (porcelain) thiab cov cement, qhov kub thiab txias hloov pauv tuaj yeem ua rau lub interface tawg.

Cov xuab zeb qhov lossis cov qoob loo loj heev nyob rau hauv lub cev plooj (porcelain) tuaj yeem ua rau tsim cov micro sab hauv- tawg thaum lub sijhawm ua haujlwm ntev -. Raws li cov kab nrib pleb nthuav tawm, lawv thaum kawg ua rau lub insulator dhau los ua xoom-tus nqi.

② Rov ua dua xob laim

Thaum ib tug pej thuam raug xob laim, lub insulator yuav raug rau impulse voltages characterized los ntawm ob leeg ntxhab wavefronts thiab siab amplitudes. Raws li cov xwm txheej no, lub taub hau plooj (porcelain head) - qhov twg qhov kev ntxhov siab yog qhov siab tshaj plaws thiab kev rwb thaiv tsev tsis muaj zog dua - tuaj yeem tiv thaiv kev puas tsuaj los ntawm ib feem. Rov ua dua rau cov kauj ruam - pem hauv ntej impulse nthwv dej ua rau qhov kev puas tsuaj ntawm lub taub hau plooj (porcelain taub hau) mus zuj zus zuj zus, nws thiaj li ua rau kev tsim ntawm xoom- tus nqi insulator.③ Cov khoom siv ntau dhau

Cov dej khov loj heev lossis cua daj cua dub tshaj qhov tsim nrawm tuaj yeem cuam tshuam cov insulators rau kev ntxhov siab ntau dhau; qhov no yuav ua rau tawg ntawm qhov chaw ntawm lub insulator tus pin steel, uas ua rau "zero-tus nqi" insulators (insulators uas tau poob lawv cov insulating muaj peev xwm).

Yav dhau los, xoom- tus nqi porcelain insulators feem ntau tshwm sim los ntawm cov khoom tsis xws luag; Txawm hais tias kev nce qib hauv kev tsim khoom siv thev naus laus zis tau txo qis qhov tshwm sim ntawm qhov tsis xws luag, qhov teeb meem ntawm xoom- tus nqi hluav taws xob uas tshwm sim los ntawm kev rov ua hluav taws xob ntau dua rau lub neej ua haujlwm ntev tam sim no xav tau kev saib xyuas ntau dua.

 

Kev tiv thaiv

① Txhim kho xoom- nrhiav kom muaj nuj nqis

Zero- kev tshawb pom tus nqi cuam tshuam nrog kev ua haujlwm hnyav, thiab kev tshawb pom kev ua haujlwm tau zoo txuas nrog txoj kev siv; ua qhov ntsuas nyob ntawm cov yees yog qhov nyuaj, ua qhov no yog qhov kev sib tw uas tseem tsis tau daws tag nrho. Nrog rau kev siv thev naus laus zis tam sim no, cov kev ntsuas hauv qab no tuaj yeem siv los txhim kho kev tshawb pom kev ua haujlwm:

Ib qho chaw kuaj xyuas ntawm cov plooj (porcelain insulators) hauv xob laim- tej thaj chaw uas yooj yim: tshem tawm cov qauv ntawm cov insulators rau kev kuaj sim; ua cov kev ntsuas hluav taws xob tiv thaiv nyob rau hauv siab - cov av noo (raws li qee qhov qis- cov nqi hluav taws xob tsis yooj yim los kuaj xyuas thaum qhuav); thiab ua cov kauj ruam - pem hauv ntej impulse kuaj xyuas seb puas muaj kev puas tsuaj rau lub taub hau insulator;

B nce qhov ntsuas hluav taws xob rau kev ntsuas kev tiv thaiv hluav taws xob;

② Txais kev ntsuas hluav taws xob hloov pauv

Ua raws li kev ntsuas hluav taws xob hloov pauv- xws li qhov tsis sib xws lossis cov neeg ntes hluav taws xob ntau - kom hloov hluav taws xob tam sim no kom deb ntawm cov insulators, yog li txo qhov tshwm sim ntawm cov hluav taws xob puas tsuaj.

③ Txhim kho txoj kab hluav taws xob tiv taus muaj peev xwm

Txhim kho cov txheej txheem hauv av thiab txhim kho cov qib rwb thaiv tsev kom txo tau qhov amplitude ntawm impulse voltage ntsib los ntawm insulators tom qab xob laim tawm tsam.