Ngophuhliso oluqhubekayo lwegridi yamandla yaseTshayina kunye nenqanaba lokufudukela ezidolophini, kwinkqubo yokwakhiwa kwegridi yamandla entambo engaphantsi komhlaba ngokuthe ngcembe ithatha indawo yemigca yokuhambisa ngaphezulu, kunye nokuqhubela phambili kokuhlala ezidolophini, ubude bubonke bentambo buya kunyuka unyaka nonyaka, njani. ukuphucula ukuthembeka kombane wentambo yentambo, kunye nokuqinisekisa ukusebenza ngokukhuselekileyo kunye nokuzinza kwenkqubo yamandla, kunye nokunciphisa ilahleko yamandla kunye nezibonelelo zezinto zabasebenzi, kuye kwaba sisihloko esibalulekileyo sokusebenza kwentambo yentambo kunye nokulawulwa kokugcinwa.
Ukusetyenziswa kweTshayina ngoku kwe-35K V enkulu yeentambo zombane ezinqamlezileyo kunye ne-66K V, i-110K V kunye nenqanaba lombane elingaphezulu kweentambo zamandla yintambo eyodwa-core, i-cable metal sheath enye isiphelo sonxibelelwano lwezigaba ezithathu kunye noqhagamshelo emhlabeni, esinye isiphelo. ayiqhagamshelwanga emhlabeni, xa amaza ombane okanye i-voltage yangaphakathi ecaleni kokuhamba kondoqo wentambo, i-Cable metal sheath ungrounded end iya kubonakala impembelelo ephezulu ye-overvoltage phenomenon, okanye xa inkqubo ye-short-circuit accident isenzeka xa umbane uqukuqela kumbindi wentambo, Isiphelo esingasekelwanga sesingxobo siyakuvela kwakhona amandla aphezulu okwenziwa kwe-overvoltage phenomenon.Kule meko ingasentla, i-voltage inokudlula ngokuthe ngqo kwisixhobo sokugquma se-cable sheath yangaphandle, ekhokelela kwimpazamo yamanqaku amaninzi ye-cable metal sheath, echaphazela kakhulu ukusebenza okuqhelekileyo kwentambo yamandla kwaye inciphise kakhulu ubomi benkonzo yentambo.Ke ngoko, ngokomgangatho wangoku weshishini lamandla ombane DL/T401-2002 "Isikhokelo sokuKhetha iCable yamandla ombane aphezulu", isikhuseli se-cable sheath kufuneka sisetyenziselwe ukunciphisa umda wombane wokungeniswa kunye nokuveliswa kombane ogqithisiweyo kwi-sheath yentsimbi yentambo yamandla.
Kwinkqubo yangoku yothumelo lwe-ac equka intambo eyodwa engundoqo e-China, ikhaka lesinyithi lentambo yombane kufuneka ibekwe phantsi.Kwinkqubo yokwakhiwa komgama omde wentambo yamandla enye, umgca wentambo uya kwakhiwa kumacandelo amaninzi, kwaye i-metal shielding layers iya kudibaniswa kunye nomnye.Kwangaxeshanye, iileya ezikhusela isinyithi zentambo yesigaba sesithathu ziya kutshintshwa ngokuqhubekayo ukuze kuphunyezwe isixa se-vector enokubakho ye-symmetrical metal shielding layers of the three-phase cable to be zero.Ibhokisi yesiseko edibeneyo yindlela esebenzayo yokukhusela isiseko sokusombulula ezi ngxaki zingentla.
Ibhokisi ye-cable sheath cross cross interconnection protectioning boxing luhlobo lwesixhobo sokumisa i-cable sheath, eyona njongo ibaluleke kakhulu kukulawula ngokufanelekileyo impembelelo yombane we-inductive kunye ne-fault overvoltage kwi-sheath yensimbi yentambo, kunye nokunciphisa iingxaki zokujikeleza kwi-sheath.Iziphelo ezimbini zekhava yensimbi yekhebula zihlulwe zibe yindawo ekhuselayo kunye nesiseko esithe ngqo.Nangona kunjalo, xa umgca wekhebula ude kakhulu, isigqubuthelo sekhebula kufuneka sahlulwe sibe ngamacandelo amathathu okudibanisa kunye kunye nesiseko esisebenzayo emva kokudibanisa kunye nokudlula kwisixhobo sokukhusela.
Okwangoku, zimbini iindlela zokufakela eziphambili ze-cable sheath cross-interconnection protection grounding box.Indlela yokuqala kukusetha ibhokisi yokubeka yokubeka ngokuzimeleyo emhlabeni kufuphi ne-intermediate joint well, iholele intambo yokumisa intambo ephakathi kwentambo ukuya kwibhokisi yokumisa i-wiring, kwaye ufake igobolondo yokukhusela kunye ne-bar yokukhusela ngaphandle kwebhokisi lokumisa.Le ndlela yokufakela ingangena emanzini kunye nomswakama, ukusebenza ngokufanelekileyo kunye nabasebenzi bokulondoloza nanini na ukuvula umsebenzi webhokisi yomhlaba, kodwa ngenxa yokuba intambo ingcwatywe kumacala omabini ezitalato zedolophu, ibhokisi yomhlaba kunye nebha yokukhusela emva kokubonakala. inkulu kwaye ifakwe emhlabeni, kulula ukuyivala kwi-facade ngabarhwebi abakufutshane okanye abahlali beendawo ezichasayo kunye nezithintelo.
(Njengoko kubonisiwe kwi-FIG. 1) Indlela yesibini kukufaka ibhokisi yokumisa kwi-intermediate joint well xa indawo efanelekileyo ingafumaneki emhlabeni kufuphi ne-intermediate joint well for installing independent (okanye ivinjwe yimiba yangaphandle).Kodwa ngenxa yokuba akukho nto ilungileyo yokutywinwa kokutywinwa kwamanzi kwibhokisi yokumisa, ininzi yebhokisi yokumisa efakwe equleni ekusebenzeni kwexesha elithile iya kuchaphazeleka kukufuma kwiidigri ezahlukeneyo, okukhokelela ekubeni ucingo lokumisa kunye nezinye iindawo zentsimbi ngaphakathi. umhlwa ibhokisi, ifiva kwaye nkqu brittle kwaphuka;Kwaye ngenxa yokuba ifakwe phakathi kakuhle, xa kuyimfuneko ukuvula ibhokisi yomhlaba ukuze usebenze, kuyimfuneko ukuvula isigqubuthelo sombindi kakuhle kuqala.Isigqubuthelo somngxuma sininzi kwaye kunzima ukusivula, nto leyo esoloko ifuna umlinganiselo othile wamandla omntu kwaye ilibazise ixesha lokusebenza.
Ixesha lokuposa: Jul-07-2022
