Dab tsi yog qhov voltage withstand xeem txoj kev rau fais fab cables? Wuhan UHV tshwj xeeb hauv kev tsim khoomseries resonance, nrog ntau yam khoom xaiv thiab kev kuaj hluav taws xob. Nrhiavseries resonance, xaiv Wuhan UHV.
Fais fab cables feem ntau yog siv los ua cov khoom siv hluav taws xob (lossis cov khoom siv) rau cov chaw tsim hluav taws xob, cov chaw ua haujlwm, thiab cov chaw lag luam thiab cov mining, thiab tau siv dav hauv cov phiaj xwm hluav taws xob hauv nroog thiab hauv nroog. Niaj hnub no, cross- txuas polyethylene rwb thaiv tsev feem ntau yog siv. Vim tias muaj peev xwm loj ntawm cov khoom siv kuaj, qee qhov chaw tseem siv qhov ncaj qha tam sim no tiv thaiv qhov ntsuas hluav taws xob rau cov khoom kuaj ntawm tus ntoo khaub lig- txuas polyethylene insulated fais fab cables (tom qab no hu ua cross- txuas cables) ua ntej ua haujlwm. Nyob rau hauv xyoo tas los no, ntau lub koom haum tshawb fawb hauv tebchaws thiab thoob ntiaj teb tau pom tias kev ntsuas ncaj qha tam sim no tuaj yeem ua rau muaj qhov sib txawv ntawm kev puas tsuaj rau hla - txuas polyethylene cables.
Cov teeb meem tseem ceeb hauv kev ntsuas qhov ntsuas hluav taws xob
Lub hauv paus ntsiab lus ntawm high-voltage testing thev naus laus zis yog tias lub zog ua haujlwm ntawm qhov ntsuas hluav taws xob siv rau cov qauv yuav tsum simulate cov kev ua haujlwm ntawm high -voltage hluav taws xob khoom siv. Qhov xaus ntawm kev dhau los yog tsis dhau qhov siab - qhov ntsuas hluav taws xob yuav tsum sawv cev seb cov ntsiab lus tsis muaj zog hauv qhov siab - cov khoom siv hluav taws xob hluav taws xob ua rau muaj kev hem thawj rau kev ua haujlwm yav tom ntej. Qhov no txhais tau hais tias qhov kev ua txhaum mechanism hauv qhov kev sim yuav tsum muaj tib lub cev txheej txheem raws li lub tshuab ua haujlwm hauv hluav taws xob. Raws li txoj cai no, cov teeb meem ntawm kev ua DC tiv thaiv qhov ntsuas hluav taws xob ntawm tus ntoo khaub lig- txuas cables feem ntau tshwm sim hauv cov hauv qab no:
1) Raws li qhov hluav taws xob ncaj qha tam sim no, lub zog hluav taws xob hluav taws xob tau muab faib raws li qhov kev tiv thaiv, thiab cov khoom siv nyob rau hauv cov txheej txheem rwb thaiv tsev ntawm tus ntoo khaub lig- txuas polyethylene cable muaj ntau yam khoom, thiab nws cov khoom tiv thaiv tsis sib xws. Nyob rau tib lub sij hawm, lub resistivity yog heev cuam tshuam los ntawm tej yam xws li kub. Yog li ntawd, nyob rau hauv qhov hluav taws xob ncaj qha tam sim no, hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv cov hluav taws xob hluav taws xob hluav taws xob hauv cov hluav taws xob hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv cov hluav taws xob hluav taws xob hluav taws xob hauv cov hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hluav taws xob hauv hluav taws xob hluav taws xob hauv hluav taws xob hauv hluav taws xob
2) Cables tsim ib qho "nco" nyhuv nyob rau hauv ncaj qha tam sim no voltage, khaws cia thiab accumulating unipolar residual nqi. Thaum muaj "nco" tshwm sim los ntawm DC tiv thaiv qhov ntsuas hluav taws xob, nws yuav siv sijhawm ntev los tso tawm qhov hluav taws xob DC no. Yog hais tias lub cable tau muab tso rau hauv kev ua haujlwm ua ntej qhov seem DC them tag nrho tso tawm, DC voltage yuav raug superimposed ntawm lub ncov ntawm lub hwj chim zaus voltage, ua rau tus nqi hluav taws xob ntawm lub cable mus deb tshaj nws cov ntsuas voltage, uas yuav ua rau rwb thaiv tsev tawg ntawm lub cable.
3) DC tiv taus qhov ntsuas hluav taws xob ntawm tus ntoo khaub lig- txuas polyethylene cables qhia tau hais tias vim qhov cuam tshuam ntawm qhov chaw them nqi, lub zog hluav taws xob tiag tiag hauv cov rwb thaiv tsev tuaj yeem ncav cuag ntau tshaj kaum npaug ntawm lub zog hluav taws xob ua haujlwm ntawm lub rwb thaiv tsev cable. Yog li ntawd, txawm tias lub cable dhau DC tiv thaiv qhov ntsuas hluav taws xob yam tsis muaj kev puas tsuaj, nws tseem yuav ua rau muaj kev puas tsuaj loj heev.
4) Kev faib tawm ntawm DC hluav taws xob hluav taws xob hluav taws xob lub zog siv hauv DC tiv thaiv qhov ntsuas hluav taws xob sib txawv ntawm AC voltage hluav taws xob hluav taws xob lub zog thaum ua haujlwm. DC tiv taus qhov ntsuas hluav taws xob tsis tuaj yeem simulate qhov overvoltage uas lub cable raug nyob rau hauv kev ua haujlwm, thiab tsis tuaj yeem kuaj pom qhov tsis xws ntawm cov cable nws tus kheej, cable txuas, thiab kev tsim kho tshuab. Nyob rau hauv xyoo tas los no, vim yog kev tsim kho thiab kho dua tshiab hauv nroog thiab nyob deb nroog, tau muaj ntau tus ntoo khaub lig- txuas cables. Lub cable tsuas yog muab tso rau hauv kev ua haujlwm tom qab DC tiv thaiv qhov ntsuas hluav taws xob, thiab kuj tseem muaj cov kab mob los yog lub taub hau cable tawg tshwm sim nyob rau hauv kev khiav hauj lwm voltage. Yog li ntawd, nws yog ib qho tsim nyog los hloov qhov qub DC tiv thaiv qhov ntsuas hluav taws xob nrog qhov tsis yog DC tiv thaiv qhov ntsuas hluav taws xob kom tsis txhob muaj kev puas tsuaj rau cov kab hluav taws xob los ntawm kev ntsuas DC thiab xyuas kom muaj kev nyab xeeb thiab txhim khu kev lag luam ntawm cov cable.
Voltage withstand xeem txoj kev
Muaj ntau ntau txoj hauv kev rau DC tsis kam ntsuas qhov ntsuas hluav taws xob, suav nrog:
1) Kev ntsuas hluav taws xob oscillation yog ua los ntawm kev them nyiaj nrog DC lub zog hluav taws xob thiab tso tawm cov khoom siv hluav taws xob thiab cov reactance los ntawm kev tawm pob qhov sib txawv kom tau txais qhov hluav taws xob oscillation voltage. Txoj kev no muaj txiaj ntsig zoo dua li DC tiv thaiv qhov ntsuas hluav taws xob, tab sis tseem tsis zoo li qhov ntsuas hluav taws xob zaus.
2) Tsawg zaus (0.1 Hz) tiv taus qhov ntsuas hluav taws xob. Vim tias qhov muaj peev xwm loj ntawm tus ntoo khaub lig- txuas cable raug sim thiab lub peev xwm loj ntawm qhov ntsuas hluav taws xob xav tau rau kev ntsuas fais fab zaus, cov khoom siv ntsuas yog loj thiab tsis haum rau ntawm - siv qhov chaw. Siv 0.1 Hz raws li qhov ntsuas fais fab mov, theoretically lub peev xwm ntawm qhov ntsuas transformer tuaj yeem txo mus rau 1/500, txo qhov hnyav ntawm qhov ntsuas transformer. Kev sim transformer tuaj yeem hloov mus rau qhov chaw rau kev sim. Tam sim no, txoj kev no feem ntau yog siv rau kev ntsuam xyuas ntawm nruab nrab thiab qis voltage cables. Vim tias qhov ntsuas hluav taws xob tsawg, nws tsis tuaj yeem siv rau kev ntsuas siab -voltage cables ntawm 66 kV thiab siab dua.
3) Resonant voltage withstand xeem. Lub adjustable inductance hom resonance test system tuaj yeem ua tau raws li qhov yuav tsum tau muaj qhov ntsuas hluav taws xob, tab sis vim nws qhov hnyav loj thiab kev txav tsis zoo, nws feem ntau yog siv hauv chav kuaj. Txoj kev hloov dua siab tshiab resonance xeem txoj kev tuaj yeem ua tau raws li qhov kev xav tau ntawm qhov hluav taws xob tiv thaiv siab ntawm -voltage cross- txuas cables, thiab muaj cov yam ntxwv ntawm lub teeb yuag thiab kev txav mus los zoo, ua rau nws haum rau ntawm - qhov chaw sim.