Ua rau Cable Failure

Qhov ncaj qha ua rau cable tsis ua haujlwm yog kev puas tsuaj ntawm rwb thaiv tsev vim degradation.

Muaj:

a. Kev ua haujlwm dhau. Lub sijhawm ua haujlwm dhau mus ntev yuav ua rau qhov kub thiab txias ntawm lub cable thiab ua rau cov rwb thaiv tsev muaj hnub nyoog, yog li cov rwb thaiv tsev yuav tawg thiab kev tsim kho zoo yuav raug txo.

b. Cov khoom siv hluav taws xob: cov txheej txheem kev tsim kho ntawm lub taub hau cable tsis ua raws li qhov yuav tsum tau ua, kev sib khi ua haujlwm ntawm lub taub hau cable tsis zoo, cov dej noo nkag mus rau hauv lub cable, thiab kev ua haujlwm rwb thaiv tsev ntawm lub cable txo; Thaum lub cable tso, kev tiv thaiv kev tiv thaiv tsis tau ua, cov txheej tiv thaiv raug puas, thiab cov rwb thaiv tsev raug txo.

c. Nyob rau hauv cov nqe lus ntawm kev tsim kho pej xeem: cov kua dej ntawm cov yeeb nkab tsis du, lub cable yog tsau rau hauv dej ntev, thiab lub zog rwb thaiv tsev puas lawm; lub qhov dej me me dhau lawm, lub vojvoog dabtsi yog khoov ntawm lub cable tsis txaus, thiab nws raug kev puas tsuaj los ntawm cov extrusion quab yuam rau lub sijhawm ntev. Nws yog qhov tseem ceeb ntawm kev tsim kho kev tsim txom hauv nroog kev tsim kho, Gouging thiab txiav cable.

d. Corrosion. Cov txheej txheem tiv thaiv tau raug tshuaj lom neeg corrosion los yog cable corrosion tau ntev, ua rau tsis ua haujlwm ntawm cov txheej txheem tiv thaiv thiab txo cov rwb thaiv tsev.

e. Qhov zoo ntawm lub cable nws tus kheej los yog cov khoom siv ntawm lub taub hau cable tsis zoo, kev sib khi ntawm lub taub hau cable tsis zoo, cov kua nplaum insulating yog yaj thiab tawg, thiab qhov tshwm sim resonance tshwm sim nyob rau hauv qhov chaw nres tsheb yog qhov kev ua txhaum ntawm txoj kab sib txuas ua rau. kab theem capacitance thiab hauv av capacitance tsim resonance nrog excitation inductance ntawm tis transformer. Loop, yog li ntawd exciting ferromagnetic resonance.

Kev puas tsuaj ntawm resonance tshwm sim los ntawm kev tsis sib haum xeeb

Nyob rau hauv cov xwm txheej hnyav ntawm kev cuam tshuam resonance, lub superposition ntawm high zaus thiab qhov tseem ceeb zaus resonance tuaj yeem ua rau lub overvoltage amplitude ncav cuag 2.5 npaug ntawm theem voltage [P], uas tuaj yeem ua rau kev hloov pauv ntawm qhov nruab nrab ntawm qhov system, thiab overvoltage. cov kab mob thiab kab mob. Rwb thaiv tsev flashover, xob laim ntes tawg, khoom siv hluav taws xob puas. Qee qhov xwm txheej, cov theem ua ntu zus ntawm qhov hloov pauv hloov pauv tuaj yeem thim rov qab, thiab cov overvoltage kuj tseem tuaj yeem xa mus rau sab qis-voltage ntawm transformer, ua rau muaj kev puas tsuaj.

Cov kev ntsuas tseem ceeb los tiv thaiv kev cuam tshuam resonance overvoltage yog raws li hauv qab no:

(1) Tsis muaj fuse siv los zam kev ua haujlwm ib nrab.

(2) Txhim kho qhov kev tshuaj xyuas thiab kev saib xyuas ntawm txoj kab kom tiv thaiv qhov tshwm sim ntawm kev sib tsoo.

(3) Tsis txhob dai qhov tsis muaj load transformer ntawm txoj kab ntev.

(4) Siv lub nplhaib sib txuas lossis ob lub hwj chim.

(5) Ntxiv cov theem-rau-theem capacitance ntawm qhov faib transformer sab,

Lub hauv paus ntsiab lus yog: siv cov capacitors ua lub zog nqus cov ntsiab lus kom nqus tau lub zog hauv cov txheej txheem hloov pauv, yog li txo qhov cuam tshuam cuam tshuam rau kev siv zog los txo qhov tshwm sim ntawm resonance. , yog li ntawd {{0}}[Co plus 3(CU plus A0)/Ca nce, yog li ua kom qhov sib npaug capacitance C thiab tus nqi capacitance xav tau ntawm qhov sib npaug electromotive force Eo tuaj yeem xam raws li txoj hauv kev hauv cov ntaub ntawv [6].

(6) Kev siv cov tshuab hloov pauv nrog cov yam ntxwv zoo dua tuaj yeem pab txo qhov tshwm sim ntawm kev cuam tshuam thiab overvoltage.