Grounding ukumelana nekhabethe

Incazelo emfushane:

Ngokuthuthuka okusheshayo kwamagridi kagesi asemadolobheni nasezindaweni zasemakhaya, izinguquko ezinkulu zenzeke esakhiweni segridi yamandla, futhi inethiwekhi yokusabalalisa elawulwa yizintambo iye yavela.I-ground capacitance current ikhule kakhulu.Uma kwenzeka iphutha lesigaba esisodwa ohlelweni, kuba namaphutha ambalwa futhi ambalwa abuyiselekayo.Ukusetshenziswa kwendlela yokuqinisa ukumelana akuzivumelanisi kuphela nezidingo eziyinhloko zokuthuthukiswa kanye noshintsho lwegridi yamandla ezwe lami, kodwa futhi kunciphisa izinga lokwahlukanisa lemishini yokudlulisa amandla ngebanga elilodwa noma amabili, kunciphisa ukutshalwa kwezimali kwegridi yamandla iyonke.Sika iphutha, cindezela i-resonance overvoltage, futhi uthuthukise ukuphepha nokuthembeka kwesistimu yamandla.

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Imininingwane Yomkhiqizo

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incazelo yomkhiqizo

Njengamanje, indlela yokusekela amaphuzu angathathi hlangothi ngokumelana ibhaliwe emithethweni yemboni yamandla.Izinga lemboni yamandla i-DL/T620-1997 “Ukuvikela I-Overvoltage and Insulation Coordination of AC Electrical Installations” icacisa ku-Athikili 3.1.4: “5~35KV ikakhulukazi yakhiwe Okwesistimu yokudluliswa kwamandla kanye nokusabalalisa eyakhiwe izintambo zekhebula, lapho eyodwa -Phase ground fault ine-capacitive current enkulu, indlela yokumelana nephansi ingasetshenziswa, kodwa izidingo zokwethenjelwa zokuphakelwa kwamandla, umthelela wamandla kagesi wesikhashana kanye namandla esikhashana emishinini kagesi ngesikhathi samaphutha, kanye Nomphumela ekuxhumaneni Izidingo zobuchwepheshe zokuvikela i-Relay nolwazi lokusebenza kwendawo, njll."I-athikili 3.1.5 iyabeka: “Amasistimu okusabalalisa amandla e-5KV kanye ne-10KV kanye nezinhlelo zamandla eplanti yamandla, lapho isigaba esisodwa se-ground fault capacitor current sisincane, ukuze kuvinjelwe Ukulimaza izinto zokusebenza ezifana ne-resonance, igebe, i-arc grounding overvoltage, njll. ., ingasekelwa ngokumelana okukhulu.”

Ngokuklama nokukhethwa kwamakhabethe okumelana, sicela futhi ubhekisele ku: DL/780-2001 Distribution System Neutral Grounding Resistor Neutral Grounding Method iyindlela ebandakanya izinga lokufakwa kwemigqa nemishini, ukuphazamiseka kokuxhumana, ukuvikelwa kokudluliselwa kanye nokuphepha kwenethiwekhi yokuphakelwa kwamandla. Ngenxa yenkinga ebanzi yokwethembeka nezinye izici, izinhlelo zokuphakelwa kukagesi zenethiwekhi yokusabalalisa yezwe lami kanye namabhizinisi amakhulu ezimboni kanye nezimayini zihlukile.Esikhathini esedlule, iningi labo lalisebenzisa imodi yokusebenza yephoyinti elingathathi hlangothi elingagxiliwe futhi elisekelwe ikhoyili yokucindezela i-arc.Eminyakeni yamuva nje, ngenxa yokuthuthukiswa kohlelo lwamandla kanye nokwanda kokusetshenziswa kwamandla kagesi kwabasebenzisi, amanye amagridi kagesi wesifundazwe nawomasipala akhuthaze ngamandla indlela yokusebenza yokusekela ukumelana.