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Idivayisi yokumelana ne-Parallel
Idivayisi yokumelana ne-parallel iyisethi yedivayisi yokukhetha ebanzi yekhabhinethi efakwe ngokuhambisana nendawo emaphakathi yesistimu futhi ixhunywe ngekhoyili yokucindezela i-arc.Ukukhetha okusebenzayo nokunembile kwemigqa yamaphutha.Kuhlelo lwekhoyili yokucindezela i-arc, idivayisi yokukhetha umugqa ohlanganisiwe wokumelana nokumelana ingasetshenziswa ukuzuza ukunemba kokukhetha komugqa okungu-100%.Idivayisi yokumelana ne-parallel resistance, noma i-parallel resistance cabinet, yakhiwe yi-grounding resistors, i-high-voltage vacuum connectors, ama-transformer amanje, ukutholwa kwesignali yamanje kanye nezinhlelo zokuguqulwa, izinhlelo zokulawula ukushintsha kokumelana, nokusekela izinhlelo zokukhetha umugqa ozinikele.
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Ikhabhinethi ye-Generator point grounding resistance resistance
Ikhabhinethi yokumelana nephuzu elingathathi hlangothi lejeneretha yaseHongyan ifakwe phakathi kwendawo engathathi hlangothi yejeneretha kanye nomhlabathi.Ngesikhathi sokusebenza kwejeneretha, ukubeka phansi kwesigaba esisodwa kuyiphutha elivame kakhulu, futhi iphuzu lephutha lizoqhubeka nokukhula lapho i-arcing isekelwe.Ukulimala kokufakwa kwe-Stator winding noma ukusha nokushiswa kwensimbi.Emazweni ngamazwe, ngenxa yamaphutha aphansi esigaba esisodwa ezinhlelweni zamajeneretha, ukusekela ukumelana okuphezulu endaweni engathathi hlangothi yamajeneretha kusetshenziswa kabanzi ukuze kukhawulwe amandla angaphansi komhlaba kanye nokuvimbela izingozi ezihlukahlukene zokugcwala kwamanzi.Iphoyinti elingathathi hlangothi lingamiswa ngesiphikisayo ukuze kukhawulwe iphutha lamanje kunani elifanele, kuthuthukiswe ukuzwela kwesivikelo sokudlulisela kanye nokwenza okuthile ekukhubekeni;ngesikhathi esifanayo, ukushiswa okuncane kwendawo kuphela kungase kwenzeke endaweni yephutha, futhi i-overvoltage yesikhashana inqunyelwe ku-voltage yomugqa ovamile.Izikhathi ezingu-2.6 ze-voltage yephoyinti engathathi hlangothi, ekhawulela ukuvutha kabusha kwe-arc;ivimbela i-arc gap overvoltage ekulimazeni imishini eyinhloko;ngesikhathi esifanayo, ingavimbela ngempumelelo i-ferromagnetic resonance overvoltage, ngaleyo ndlela iqinisekise ukusebenza okuphephile kwejeneretha.
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Ikhabhinethi yokumelana nephuzu elingathathi hlangothi le-Transformer
Kugridi yamandla engu-6-35KV AC yohlelo lwamandla ezwe lami, kunamaphuzu angathathi hlangothi angagxiliwe, asekelwe ngamakhoyili okucindezela ama-arc, asekelwe phansi ukumelana kakhulu, kanye nokumelana nokuncane okusekelwe phansi.Ohlelweni lwamandla (ikakhulukazi uhlelo lokuphakelwa kwamandla enethiwekhi yasemadolobheni enezintambo njengezintambo eziyinhloko zokudlulisa), i-ground capacitive current inkulu, engase yenze ukuvela kwe-arc overvoltage yomhlabathi "isikhashana" ibe nezimo ezithile "ezibucayi", okuholela e-arcing. Ukusetshenziswa kwendlela yokuqinisa ukumelana nephuzu lokungathathi hlangothi kokukhiqizwa kokugcwala kwe-grounding overvoltage kwakha isiteshi sokukhipha amandla (inkokhelo) kumthamo wegridi ukuya emhlabathini, futhi kujove amandla anamandla endaweni yephutha, okwenza iphutha eliphansi lithathe imvelo ye-resistance-capacitance, ukunciphisa kanye Umehluko we-engeli yesigaba se-voltage kunciphisa izinga lokuvutha kabusha ngemva kokuba i-current endaweni yephutha inqamule ku-zero futhi yephule isimo "esibucayi" se-arc overvoltage, ukuze i-overvoltage ikhawulelwe ngaphakathi kwe-2.6 izikhathi ze-voltage yesigaba, futhi ngesikhathi esifanayo kuqinisekisa ukuzwela okuphezulu kokuvikelwa kwephutha lomhlabathi Imishini inquma ngokunembile futhi inqamule amaphutha ayinhloko kanye nesibili omphakeli, ngaleyo ndlela ivikele ngempumelelo ukusebenza okuvamile kwesistimu.
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Grounding ukumelana iKhabhinethi
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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Ibhokisi lokumelana ne-Damping
Ukuze kuvinjwe i-voltage engalingani yephoyinti elingathathi hlangothi lesistimu yegridi ukuthi ingakhuli ngenxa yokokufaka nesilinganiso sekhoyili yokucindezela i-arc lapho ikhoyili yokucindezela i-arc yemodi yesinxephezelo yokulungisa kusengaphambili isebenza ngaphansi kwesimo esivamile segridi yamandla. , iyacwaningwa futhi iklanywe.Uma igridi yamandla isebenza ngokujwayelekile, lungisa i-inductance yekhoyili yokucindezela i-arc endaweni efanele kusengaphambili, kodwa ngalesi sikhathi i-inductance ne-capacitive reactance cishe ilingana, okuzokwenza igridi yamandla ibe sesimweni esiseduze ne-resonance, okubangela i-voltage yephoyinti engathathi hlangothi izokhuphuka.Ukuze uvimbele lokhu Uma kwenzeka kwenzeka, idivayisi ye-resistor encibilikayo yengezwa kudivayisi yesinxephezelo sekhoyili ye-arc kumodi yokulungiswa kwangaphambili, ukuze kucindezelwe i-voltage yokugudluka yephoyinti elingathathi hlangothi iye endaweni efanele edingekayo futhi kuqinisekiswe okuvamile. ukusebenza kwenethiwekhi yokuphakela amandla.
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Isethi ephelele yekhoyili yokucindezela i-arc elawulwa ngesigaba
Incazelo yesimiso sesakhiwo
Ikhoyili yokucindezela i-arc elawulwa yisigaba nayo ibizwa ngokuthi “uhlobo lwe-high short-circuit impedance”, okungukuthi, ukusonga okuyinhloko kwekhoyili yokucindezela i-arc kudivayisi ephelele ixhunywe endaweni engathathi hlangothi yenethiwekhi yokusabalalisa njengomoya osebenzayo, futhi ukusonga kwesibili kusetshenziswa njengokulawula ukusonga okubili okuxhumeke ngokubuyela emuva I-thyristor ine-circuited short-circuited, kanti i-short-circuit current kuma-winding esibili ilungiswa ngokulungisa i-conduction angle ye-thyristor, ukuze kubonakale ukulungiswa okulawulwayo inani lokusabela.iyalungiseka.
I-engeli conduction ye-thyristor iyahlukahluka ukusuka ku-0 kuye ku-1800, ukuze i-impedance efanayo ye-thyristor ihluke ukusuka kokungapheli kuye ku-zero, futhi isinxephezelo samanje esiphumayo singalungiswa ngokuqhubekayo ngaphandle kwesinyathelo phakathi kweziro kanye nenani elilinganiselwe.
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Isethi ephelele yekhoyili yokucindezela i-arc ekwazi ukushintsha amandla
Incazelo yesimiso sesakhiwo
Ikhoyili yokucindezela i-arc eshintsha amandla iwukwengeza ikhoyili yesibili kudivayisi yekhoyili yokucindezela i-arc, futhi amaqembu amaningana emithwalo ye-capacitor axhunywe ngokuhambisana kukhoyili yesibili, futhi ukwakheka kwayo kuboniswe esithombeni esingezansi.I-N1 iwukujikajika okukhulu, kanti i-N2 iwukujika kwesibili.Amaqembu amaningana ama-capacitor anama-vacuum switch noma ama-thyristors axhunywe ngokuhambisana ohlangothini lwesibili ukuze alungise ukusabela kwe-capacitive ye-secondary side capacitor.Ngokomgomo wokuguqulwa kwe-impedance, ukulungisa inani le-capacitive reactance yohlangothi lwesibili kungahlangabezana nemfuneko yokushintsha i-inductor yamanje yohlangothi oluyinhloko.Kunezimvume eziningi ezihlukene nezinhlanganisela zosayizi wevelu ye-capacitance kanye nenani lamaqembu ukuhlangabezana nezidingo zobubanzi bokulungisa nokunemba.
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Isethi ephelele yekhoyili yokucindezela i-arc ye-bias magnetic
Incazelo yesimiso sesakhiwo
Ikhoyili yokucindezela i-arc yohlobo oluchemile yamukela ukuhlelwa kwengxenye yensimbi enozibuthe kukhoyili ye-AC, futhi ukungena kukazibuthe kwengqikithi yensimbi kuyashintshwa ngokufaka i-DC excitation current, ukuze kubonwe ukulungiswa okuqhubekayo kwe-inductance.Uma kwenzeka iphutha eliphansi lesigaba esisodwa kugridi yamandla, isilawuli silungisa ngokushesha i-inductance ukuze sinxephezele amandla wamanje wamanje.
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Idivayisi ye-HYXHX ehlakaniphile yokucindezela i-arc
Kuhlelo lwezwe lami lokuhlinzeka ngogesi lwe-3~35KV, iningi lazo amasistimu angenasisekelo angathathi hlangothi.Ngokusho kwemithetho kazwelonke, lapho kwenziwa isisekelo sesigaba esisodwa, uhlelo luvunyelwe ukusebenza ngephutha amahora angu-2, okunciphisa kakhulu izindleko zokusebenza futhi kuthuthukise ukuthembeka kwesistimu yokuhlinzeka amandla.Kodwa-ke, ngenxa yokwanda kancane kancane komthamo wokunikezwa kwamandla wesistimu, imodi yokuphakelwa kwamandla ithi Ulayini ongaphezulu kancane kancane uguqulwa ube umugqa wekhebula, futhi amandla okusebenza kwesistimu phansi azoba mkhulu kakhulu.Uma isistimu isekelwe esigabeni esisodwa, i-arc eyakhiwe amandla anamandla amaningi akulula ukuyicisha, futhi kungenzeka kakhulu ukuthi iguqukele ekusekelweni kwe-arc okuphakathi.Ngalesi sikhathi, i-arc grounding overvoltage kanye ne-ferromagnetic resonance overvoltage ejatshuliswa yiyo izosongela kakhulu ukusebenza okuphephile kwegridi yamandla.Phakathi kwazo, i-arc-ground overvoltage yesigaba esisodwa iyona eyingozi kakhulu, futhi izinga lokudlulela kwesigaba esingelona iphutha lingafinyelela izikhathi ezingu-3 kuya kwezingu-3.5 i-voltage yesigaba sokusebenza esivamile.Uma i-overvoltage ephezulu kangaka isebenza kugridi yamandla amahora ambalwa, nakanjani izolimaza ukufakwa kwemishini kagesi.Ngemuva kwezikhathi ezimbalwa zokulimala okuqoqiwe ekufakweni kwemishini kagesi, kuzokwakhiwa indawo ebuthakathaka yokufakelwa, okuzodala ingozi yokuqhekeka kwe-insulation yomhlaba kanye nesifunda esifushane phakathi kwezigaba, futhi ngasikhathi sinye kubangele ukuwohloka kwemishini kagesi (ikakhulukazi ukuqhekeka kwe-insulation yemoto)), ukwenzeka kokuqhuma kwekhebula, ukugcwala kwe-voltage transformer kuvuselela umzimba we-ferromagnetic resonance ukuthi ushise, nokuqhuma kwesibambi nezinye izingozi.
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Isethi ephelele yekhoyili yokucindezela i-arc yokujika
Ohlelweni lwenethiwekhi yoguquko nokusabalalisa, kunezinhlobo ezintathu zezindlela zokusekela amaphuzu angathathi hlangothi, eyodwa iwuhlelo olungenasisekelo lwephoyinti elingathathi hlangothi, enye iphoyinti elingathathi hlangothi ngohlelo lokugxilisa ikhoyili yokucindezela i-arc, kanti enye indawo engathathi hlangothi ngokumelana uhlelo lwesistimu yesisekelo.