Uxhulumaniso lwe-H0 kwi-transformer yokusabalalisa izigaba ezintathu yinto ebalulekileyo yoyilo lwe-transformer, ngokukodwa kumxholo wokumisa kunye nokuzinza kwenkqubo. Olu qhagamshelo lubhekisa kwindawo engathathi hlangothi okanye yokumisa i-high-voltage (HV) ejikajikayo kwi-transformer, edla ngokuchazwa njenge-H0. Ukuphathwa ngokufanelekileyo kunye nokudibanisa kwe-H0 kubalulekile ekuqinisekiseni ukusebenza ngokukhuselekileyo kunye nokusebenza kakuhle kweenkqubo zokuhambisa umbane.
Yintoni i-H0 kwiSiguquli seSigaba esiThathu?
I-H0 imele indawo engathathi hlangothi ye-high-voltage winding kwi-transformer yesigaba sesithathu. Yindawo apho izigaba zokujija zidibana kuqwalaselo lwe-wye (inkwenkwezi), idala indawo ephakathi ephakathi. Eli nqaku lingathathi hlangothi lingasetyenziselwa iinjongo zokubeka phantsi, ukubonelela indawo yereferensi ezinzileyo yenkqubo kunye nokuphucula ukhuseleko lombane jikelele.
Ukubaluleka kwe-H0 Grounding
Ukuthoba inqaku le-H0 kusebenzela iinjongo ezininzi ezibalulekileyo:
1.Uzinzo lweNkqubo kunye noKhuseleko: Ngokumisa i-H0, inkqubo inendawo yokubhekisela esisigxina, enceda ukugcina ukuzinza kwamandla kuzo zonke izigaba. Olu xhulumaniso lunciphisa umngcipheko weemeko zokugqithisa, ezinokuthi zenzeke ngenxa yemithwalo engalinganiyo okanye iimpazamo zangaphandle.
2.Ukhuseleko lweempazamo: Ukuthoba inqaku le-H0 kuvumela i-fault currents ukuba ihambe phantsi, ivumela izixhobo zokukhusela ezifana ne-circuit breakers kunye ne-relays ukuze zibone kwaye zihlukanise iimpazamo ngokukhawuleza. Oku kunceda ukunciphisa umonakalo kwi-transformer kunye nezixhobo ezixhunyiwe, ukuqinisekisa ukuqhubeka nokusebenza okukhuselekileyo.
3.Ukunciphisa iHarmonic: Isiseko esifanelekileyo se-H0 sinceda ekunciphiseni impembelelo ye-harmonics ngaphakathi kwenkqubo, ngokukodwa i-zero-sequence harmonics enokuthi ijikeleze ngokungathathi hlangothi. Oku kubaluleke ngakumbi kwiinkqubo apho izixhobo ze-elektroniki ezibuthathaka zisetyenziswa, njengoko i-harmonics inokubangela ukuphazamiseka kwaye inciphise ubomi besixhobo.
4.Ukucuthwa kokuThatyathwa kwee-Overtages: Ukuthoba inqaku le-H0 kunokunceda ukunciphisa ukugqithisa okwethutyana okubangelwa ukutshintshwa kwemisebenzi okanye ukubetha kombane, ngaloo ndlela ukhusela i-transformer kunye nomthwalo odibeneyo.
Iintlobo ze-H0 Grounding
Kukho iindlela ezininzi eziqhelekileyo zokumisela inqaku le-H0, nganye inesicelo sayo esithile:
1.Ukubeka phantsi komhlaba okuqinileyo: Le ndlela ibandakanya ukudibanisa i-H0 ngokuthe ngqo emhlabeni ngaphandle kokuphazamiseka kokungenelela. Ilula kwaye iyasebenza kwiinkqubo ze-voltage ephantsi kunye ne-medium-voltage apho i-fault currents ilawulwa.
2.I-Resistor Grounding: Kule ndlela, i-H0 idibaniswe nomhlaba ngokusebenzisa i-resistor. Oku kunciphisa impazamo yangoku kwinqanaba elikhuselekileyo, ukunciphisa uxinzelelo kwi-transformer kunye nezinye izixhobo ngexesha leempazamo zomhlaba. Isetyenziswa ngokuqhelekileyo kwiinkqubo zombane ophakathi.
3.I-Reactor Grounding: Apha, i-reactor (inductor) isetyenziswa phakathi kwe-H0 kunye nomhlaba. Le ndlela ibonelela nge-impedance ephezulu yokunciphisa i-fault currents kwaye isetyenziswa ngokuqhelekileyo kwiinkqubo eziphezulu ze-voltage apho ubukhulu besiphoso kufuneka ilawulwe.
4.Ingafakwanga phantsi okanye idada: Kwezinye iimeko ezikhethekileyo, inqaku le-H0 alisekelwanga kwaphela. Olu lungelelwaniso aluxhaphakanga kwaye ludla ngokusebenza kwizicelo ezithile zemizi-mveliso apho kufuneka ukwahlulwa emhlabeni.
IiNgcebiso eziGqwesileyo ze-H0 Grounding
Ukuqinisekisa ukusebenza okugqibeleleyo kwesiguquli sokuhanjiswa kwezigaba ezithathu, iindlela ezininzi ezilungileyo kufuneka zilandelwe malunga nokusekwa kwe-H0:
1.Uyilo oluLungileyo kunye noFakelo: Uyilo lwenkqubo yokumisa i-H0 kufuneka lusekelwe kwiimfuno ezithile zesicelo, kuthathelwe ingqalelo izinto ezifana namanqanaba akhoyo, i-voltage yenkqubo, kunye neemeko zokusingqongileyo.
2.Uvavanyo kunye noLondolozo lwarhoqo: Iisistim zomhlaba kufuneka zihlolwe rhoqo kwaye zivavanywe ukuqinisekisa ukuba zigcina indlela ephantsi yokuthintela ukuya emhlabeni. Ngokuhamba kwexesha, unxibelelwano lunokonakala okanye lukhululeke, lunciphise ukusebenza kwalo.
3.Ukuthotyelwa kweMigangatho: Iindlela zokumisela kufuneka zihambelane nemigangatho yeshishini echaphazelekayo kunye nemimiselo, njengaleyo isekwe yi-IEEE, i-IEC, okanye iikhowudi zombane zasekhaya.
Ukuqukumbela
Uxhulumaniso lwe-H0 kwi-transformer yesigaba esithathu yinxalenye ebalulekileyo edlala indima ebalulekileyo kwisiseko kunye nokuzinza ngokubanzi kwenkqubo yokusabalalisa amandla. Ukumisa ngokufanelekileyo i-H0 akugcini nje ukwandisa ukhuseleko lwenkqubo kunye nokukhuselwa kweempazamo kodwa kunegalelo ekusebenzeni ngokufanelekileyo kothungelwano lombane.
Ixesha lokuposa: Sep-18-2024