Ndi chitukuko chosalekeza cha gridi yamagetsi yaku China ndi kuchuluka kwa mizinda ikukwera, pomanga gridi yamagetsi yamagetsi mobisa pang'onopang'ono m'malo mwa mizere yopatsirana, komanso kupita patsogolo kwa mizinda, kutalika kwa chingwe kudzawonjezeka chaka ndi chaka, momwe kupititsa patsogolo kudalirika kwa magetsi a chingwe, ndikutsimikizira kuti njira yoyendetsera mphamvu ndi yotetezeka komanso yokhazikika, komanso kuchepetsa kutayika kwa mphamvu ndi chuma cha anthu ogwira ntchito, wakhala mutu wofunikira wa ntchito ya chingwe ndi kasamalidwe kosamalira.
China yomwe ikugwiritsa ntchito zingwe zazikulu zamagetsi za 35K V ndi 66K V, 110K V komanso pamwamba pamlingo wamagetsi a zingwe zamagetsi ndi chingwe chapakati, chingwe chachitsulo cholumikizira mbali imodzi yolumikizira magawo atatu ndikulumikizana pansi, kumapeto kwina. si chikugwirizana pansi, pamene mphezi yoweyula kapena voteji mkati pamodzi otaya chingwe pachimake, Chingwe zitsulo mchimake ungrounded mapeto adzaoneka mkulu zimakhudza overvoltage chodabwitsa, kapena pamene dongosolo yochepa dera ngozi kumachitika pamene panopa ukuyenda kudzera pachimake chingwe, m'chimake ungrounded mapeto adzaoneka mkulu mphamvu pafupipafupi kupatsidwa ulemu overvoltage chodabwitsa.Pazimenezi, voteji akhoza mwachindunji kudutsa zipangizo kutchinjiriza chingwe m'chimake chakunja, chifukwa Mipikisano mfundo grounding cholakwa cha chingwe zitsulo m'chimake, amene kwambiri amakhudza yachibadwa ntchito chingwe mphamvu ndipo ngakhale amachepetsa kwambiri moyo utumiki wa chingwe.Chifukwa chake, molingana ndi mulingo wapano wamagetsi amagetsi a DL/T401-2002 "Guide for Selection of High Voltage Power Cable", choteteza chingwe cha sheath chiyenera kugwiritsidwa ntchito kuchepetsa mphamvu yamagetsi yolowera ndi kutulutsa mphamvu kwamagetsi pazitsulo zachitsulo.
M'makina apano a ma AC omwe ali ndi chingwe chimodzi chokha ku China, chishango chachitsulo cha chingwe chamagetsi chiyenera kukhazikitsidwa.Pakumanga mtunda wautali wa chingwe cha mphamvu imodzi, chingwe cha chingwe chiyenera kumangidwa m'magawo angapo, ndipo zigawo zotetezera zitsulo ziyenera kulumikizidwa wina ndi mzake.Panthawi imodzimodziyo, zigawo zotetezera zitsulo za chingwe cha magawo atatu ziyenera kusinthidwa mosalekeza kuti zikwaniritse kuchuluka kwa vector yomwe ingakhalepo ya zigawo zotchinga zazitsulo zazitsulo zitatu kuti zikhale ziro.Bokosi lolumikizidwa pansi ndi njira yabwino yodzitetezera kuti athetse mavuto omwe ali pamwambawa.
Chingwe m'chimake mtanda cholumikizira chitetezo pansi bokosi ndi mtundu wa chingwe m'chimake pansi chipangizo, cholinga chofunika kwambiri chimene ndi bwino kulamulira chikoka cha voteji inductive ndi vuto overvoltage pa chingwe zitsulo m'chimake, ndi kuchepetsa mavuto kufalitsidwa mu m'chimake.Mapeto awiri a chivundikiro chachitsulo chachitsulo amagawidwa kukhala maziko otetezera ndi kuyika mwachindunji.Komabe, chingwe cha chingwe chikakhala chachitali, chivundikiro cha chingwecho chiyenera kugawidwa m'magawo atatu kuti azitha kugwirizanitsa ndi kukhazikika bwino pambuyo pa kugwirizanitsa ndi kudutsa chipangizo chotetezera.
Pakalipano, pali njira ziwiri zazikulu zokhazikitsira za kufala kwa chingwe sheath cross-interconnection protection grounding box.Njira yoyamba ndiyo kukhazikitsa bokosi lokhazikitsira pansi pawokha pansi pafupi ndi cholumikizira chapakati, kutsogolera waya wolumikizira chingwe chapakati pabokosi loyatsira ma waya, ndikuyika chipolopolo chachitetezo ndi kapamwamba koteteza kunja kwa bokosi lokhazikika.Njira yoyikayi ikhoza kukhala yopanda madzi komanso yopanda chinyezi, ogwira ntchito bwino komanso ogwira ntchito yosamalira nthawi iliyonse kuti atsegule bokosi lapansi, koma chifukwa chingwecho chimakwiriridwa mbali zonse za misewu ya tawuniyi, bokosi lapansi ndi bar yoteteza pambuyo powonekera. ndi yayikulu ndikuyika pansi, yosavuta kutsekereza kutsogolo ndi amalonda apafupi kapena okhala m'malo otsutsa ndi otsekereza.
(Monga momwe zasonyezedwera mu FIG. 1) Njira yachiwiri ndiyo kukhazikitsa bokosi lokhazikitsira pansi pamtunda wapakati bwino pamene malo oyenerera sangapezeke pansi pafupi ndi chitsime chapakati kuti akhazikitse pawokha (kapena kutsekedwa ndi zinthu zakunja).Koma chifukwa palibe madzi abwino osindikizira osindikizira a bokosi lokhazikitsira pansi, ambiri mwa bokosi loyikapo pansi lomwe limayikidwa mu chitsime pakugwira ntchito kwa nthawi lidzakhudzidwa ndi chinyezi mu madigiri osiyanasiyana, zomwe zimapangitsa kuti waya wapansi ndi ziwalo zina zachitsulo mkati. bokosi dzimbiri, malungo komanso ngakhale brittle wosweka;Ndipo chifukwa imayikidwa pakati bwino, pamene kuli kofunikira kutsegula bokosi la pansi kuti ligwire ntchito, m'pofunika kutsegula chivundikiro chapakati bwino poyamba.Chivundikiro cha dzenje chimakhala chochuluka komanso chovuta kutsegula, chomwe nthawi zambiri chimafuna mphamvu yaumunthu ndikuchedwetsa nthawi yogwira ntchito.
Nthawi yotumiza: Jul-07-2022
