Ikhabhinethi yokumelana nokuphantsi

Grounding ukumelana ikhabhinethi Umfanekiso Featured

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Ngophuhliso olukhawulezayo lweegridi zamandla asezidolophini nasezilalini, utshintsho olukhulu lwenzekile kwisakhiwo segridi yamandla, kwaye inethiwekhi yokusabalalisa elawulwa yintambo ibonakale.Umsinga we-capacitance current unyuke kakhulu.Xa impazamo yomhlaba yenqanaba elinye isenzeka kwinkqubo, zimbalwa kwaye zimbalwa iimpazamo ezinokuhlawuleka.Ukusetyenziswa ukuxhathisa indlela yokumisa hayi nje ukuziqhelanisa nophuhliso oluphambili kunye neemfuno zotshintsho lwegridi yamandla elizwe lam, kodwa kunciphisa inqanaba lokufakelwa kwezixhobo zokuhambisa amandla ngebakala elinye okanye amabini, ukunciphisa utyalo-mali lwegridi yamandla iyonke.Sika impazamo, cinezela i-resonance overvoltage, kwaye uphucule ukhuseleko kunye nokuthembeka kwenkqubo yamandla.

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Okwangoku, indlela yokumisa indawo engathathi hlangothi ngokuchasana ibhaliwe kwimimiselo yoshishino lwamandla.Umgangatho woshishino lwamandla DL/T620-1997 "UkuKhuselwa kwe-Overvoltage kunye noLungelelwaniso lwe-Insulation yoFakelo loMbane lwe-AC" luchaza kwiNqaku 3.1.4: "5~35KV ikakhulu iqulunqwe ngoKusasaza umbane kunye nenkqubo yokuhambisa iqulunqwe ngeentambo zentambo, xa inye. -Isiphambeko somhlaba wesigaba sinombane omkhulu we-capacitive, indlela yokumisa ephantsi ingasetyenziswa, kodwa iimfuno zokuthembeka konikezelo lwamandla, impembelelo yombane wexeshana kunye nombane odlulayo kwisixhobo sombane ngexesha leempazamo, kunye neMpembelelo kunxibelelwano lweemfuno zobugcisa zokukhuselwa kweRelay. kunye namava okusebenza asekuhlaleni, njl.Inqaku le-3.1.5 licacisa: “Iinkqubo zokuhanjiswa kwamandla e-5KV kunye ne-10KV kunye neenkqubo zamandla ombane weplanti yombane, xa i-single-phault ground fault capacitor current incinci, ukwenzela ukuthintela Ukonakaliswa kwezixhobo ezifana ne-resonance, gap, I arc grounding overvoltage, njl. ., inokusekelwa ngokuxhathisa okukhulu.”

Kuyilo kunye nokukhethwa kweekhabhinethi zokumelana, nceda uphinde ubhekisele kwi: DL/780-2001 Distribution System Neutral Grounding Resistor Neutral Grounding Method yindlela ebandakanya inqanaba lokufakelwa kwemigca kunye nezixhobo, ukuphazamiseka konxibelelwano, ukukhuselwa kwe-relay kunye nokhuseleko lwenethiwekhi yokubonelela ngombane. Ngenxa yengxaki ebanzi yokuthembeka kunye nezinye izinto, iinkqubo zobonelelo lwamandla othungelwano losasazo lwelizwe lam kunye namashishini amakhulu oshishino kunye nemigodi ahlukile.Kwixesha elidlulileyo, uninzi lwazo lwalusebenzisa imowudi yokusebenza yendawo engathathi hlangothi kwaye isekelwe kwikhoyili yokucinezelwa kwe-arc.Kwiminyaka yakutshanje, ngenxa yophuhliso lwesixokelelwano samandla kunye nokwanda kokusetyenziswa kwamandla kwabasebenzisi, ezinye iigridi zamandla zephondo kunye nekamasipala ziye zakhuthaza ngamandla indlela yokusebenza yokumelana nesiseko.