Ukusabela okubangelwa inethiwekhi emfushane yezithando zomlilo ezinkulu neziphakathi ezingaphansi kwamanzi zenza cishe u-70% wokusabela kokusebenza kwesithando somlilo.Inethiwekhi emfushane yesithando somlilo we-arc ibhekisela ethemini elijwayelekile lezinhlobo ezihlukahlukene zokucindezela okuphansi kanye nama-conductor amanje aphezulu kagesi kusukela ekugcineni kweqembu eliphansi lokuphuma kwe-transformer yesithando somlilo kagesi kuya esigabeni sikagesi.Nakuba ubude benethi emfushane yesithando somlilo esingaphansi kwamanzi bungasikhulu, izimelambisi ezimfushane zenethi nokusabela kunomthelela omkhulu ezintweni zokusebenza zesithando somlilo se-arc esingaphansi kwamanzi.Ngenxa yesakhiwo sayo esinzima, amandla amanje adlula kuwo afinyelela amakhulu ezinkulungwane zama-ampere.Ngenxa yokuthi inani lokusabela kwesekethe emfishane ngokuvamile liphindwe izikhathi ezi-3 kuya kwezingu-6 kunesiphikisayo, ukusabela kwesekethe emfishane kunquma kakhulu ukusebenza kahle, isici samandla nezinga lokusetshenziswa kwamandla lesithando somlilo esingaphansi kwamanzi.
Indlela evamile yesinxephezelo eyenziwa ngesandla iwukuxhuma ibhange le-capacitor yesinxephezelo esiwuchungechunge ebhasini lamandla kagesi aphezulu ohlangothini oluyinhloko lwe-arc furnace transformer, okungukuthi, isinxephezelo samandla kagesi aphezulu.Njengoba umphumela wesinxephezelo ungazuza kuphela emugqeni ngaphambi kwendawo yokufinyelela kanye nohlangothi lwegridi yamandla yesistimu yokuphakela amandla, isistimu yokuphakela amandla ingahlangabezana nezidingo ezihlobene nesici samandla somugqa wokulayisha, kodwa ayikwazi ukunxephezela ama-windings e-transformer. , inethiwekhi emfishane, nama-electrode esithandweni semayini.Amandla asebenzayo awo wonke ama-secondary-side low-voltage kanye nama-high-current circuits, okungukuthi, izinto zokusebenza azikwazi ukuzuza ekwandeni kokukhiqizwa kwemikhiqizo yeziko lezimayini kanye nokunciphisa ukusetshenziswa kwamandla kanye nokusetshenziswa kwezimayini.
Ngokuvamile, ukubeka izinyathelo eziphikisanayo ze-harmonic kanye nezinyathelo ezigxiliwe ze-harmonic zingahlanganiswa ukuze zakhe i-harmonic countermeasure engabizi.Ukuze uthole imithwalo yomthombo we-harmonic enamandla amakhulu (njengamafurnace emvamisa, ama-inverter, njll.), izinyathelo eziphikisana ne-harmonic zingasetshenziswa ukuze kumiswe izinyathelo eziphikisana ne-harmonic , ukuze kuncishiswe i-harmonic yamanje efakwe kugridi.Amandla amancane uma kuqhathaniswa nemithwalo engaqondile ehlakazekile ingaphathwa ngokufanayo ebhasini.Isihlungi esisebenzayo se-Hongyan APF singasetshenziswa, futhi isilawuli se-harmonic singasetshenziswa.
Isithando somlilo se-arc esingaphansi kwamanzi siyisithando somlilo esincibilikisa amandla sikagesi esiphezulu esinezici zesithando somlilo esiphikisayo sikagesi.Isici samandla sinqunywa i-arc nokumelana no-R esithandweni somlilo kanye nenani lokumelana no-R kanye nokusabela kwe-X kumjikelezo wokuphakela amandla (okuhlanganisa ama-transformers, amanetha wesifunda esifushane, izindandatho zokuqoqa, imihlathi eqhubayo nama-electrode).
cosφ=(r #+r)/ukumelana x inani le-resistor r ngokuvamile alishintshi lapho isithando somlilo se-arc esingaphansi kwamanzi sisebenza, kuncike ekwakhiweni nasekufakweni kwenethiwekhi emfushane nesakhiwo sesiteji sikagesi.Ukumelana no-R kuhlobene nokuqina kwamanje kwezingxenye ezikhuphukayo zesifunda esifushane phakathi nenqubo yokusebenza, futhi ukuguqulwa akukukhulu, kodwa ukumelana no-R kuyisici esibalulekile ekunqumeni isici samandla esithandweni se-arc esingaphansi kwamanzi ngesikhathi senqubo yokusebenza. .
Njengoba isithando somlilo se-arc esingaphansi kwamanzi sinokumelana okubuthakathaka kunezinye iziko zokuncibilikisa zikagesi, isici saso samandla sincishiswa ngokufanele.Ngaphezu kwesilinganiso samandla emvelo esithandweni somlilo semayini encane esivamile esifinyelela ngaphezu kuka-0.9, izinga lamandla emvelo esithandweni semayini esikhulu esinamandla angaphezu kuka-10000KVA wonke angaphansi kuka-0.9, futhi uma sikhulu amandla esithandweni semayini, amandla ayancipha. isici.Lokhu kungenxa yomthwalo omkhulu we-inductive we-submerged arc furnace transformer esikhaleni esikhulu, isikhathi eside inethiwekhi emfushane, kanye nesisindo semfucumfucu efakwe esithandweni, okwandisa ukusabela kwenethiwekhi emfushane, ngaleyo ndlela kunciphisa isici samandla. yesithando somlilo se-arc esingaphansi kwamanzi.
Ukuze kwehliswe ukusetshenziswa kwegridi yamandla futhi kuthuthukiswe ikhwalithi yohlelo lokuphakelwa kukagesi, i-Power Supply Bureau ibeka ukuthi isici samandla enkampani kagesi kufanele sibe cishe ku-0.9, ngaphandle kwalokho inkampani kagesi izojeziswa ngezijeziso ezinkulu.Ngaphezu kwalokho, isici samandla aphansi sizophinde sinciphise i-voltage yolayini engenayo yesithando somlilo se-arc esingaphansi kwamanzi, esizolimaza isincibilikisi se-calcium carbide.Ngakho-ke, okwamanje, izithando zomlilo ezingaphansi kwamanzi ezinomthamo omkhulu ekhaya naphesheya zidinga ukufaka amadivayisi asebenzayo esinxephezelo samandla ukuze kuthuthukiswe isici samandla sezithando ze-arc ezingaphansi kwamanzi.
Isinxephezelo sesihlungi se-voltage ephansi
1. Isimiso
Isinxephezelo samandla kagesi aphansi siyithuluzi lesinxephezelo elingasebenzi elisebenzisa ubuchwepheshe besimanje bokulawula kanye nobuchwepheshe benethiwekhi emfishane ukuze kuxhunywe umthamo wamandla kagesi amakhulu, amanje aphezulu aphansi kakhulu ohlangothini lwesibili lwesithando somlilo semayini.Le divayisi ayikona nje kuphela ukusebenza okungcono kakhulu kwesimiso sesinxephezelo samandla asebenzayo, kodwa futhi ingenza isici samandla esithandweni semayini isebenze ngenani eliphakeme, inciphise ukusetshenziswa kwamandla okusebenzayo kwenethiwekhi emfushane kanye nohlangothi oluyinhloko, futhi isuse i-harmonics yesithathu, yesihlanu neyesikhombisa.Linganisa amandla okukhipha ezigaba ezintathu ukwandisa umthamo wokuphuma kwe-transformer.Ukugxila kokulawula ukunciphisa izinga elingalingani lamandla ezigaba ezintathu futhi kuzuzwe amandla alinganayo ezigaba ezintathu.Nweba ibhodwe lokuqinisa, ugxilise ukushisa, ukhuphule izinga lokushisa kwesithando somlilo, futhi usheshise ukusabela, ukuze ufeze inhloso yokuthuthukisa ikhwalithi yomkhiqizo, ukunciphisa ukusetshenziswa, nokwandisa umkhiqizo.
Lobu buchwepheshe busebenzisa ubuchwepheshe besinxephezelo esivamile esisesayithini ohlangothini lwesibili lwe-low-voltage yesithando somlilo semayini.Amandla asebenzayo akhiqizwa i-capacitor adlula emgqeni omfushane, ingxenye yawo emuncwa i-transformer yesithando somlilo semayini kusuka ohlelweni, futhi enye ingxenye inxephezela amandla asebenzayo we-transformer yesithando somlilo, inethiwekhi emfushane nama-electrode.Ukulahlekelwa amandla kukhulisa okokufaka kwamandla asebenzayo esithandweni.Ngesikhathi esifanayo, isinxephezelo esihlukaniswe ngesigaba siyamukelwa ukwenza amandla asebenzayo kuma-electrode esigaba sesithathu sesithando somlilo se-arc esingaphansi kwamanzi alingane, ukuze kuthuthukiswe isici samandla, ukunciphisa ukungalingani kwamandla ezigaba ezintathu, nokuthuthukisa ukukhiqizwa. inkomba.
2. Ukusetshenziswa kwesinxephezelo sikagesi ophansi
Eminyakeni yamuva, ngenxa yokuthuthukiswa kancane kancane kobuchwepheshe besinxephezelo se-low-voltage, uhlelo lokuklama luye lwaba luphelele kakhulu, futhi umthamo uncishiswe kakhulu.Abakhiqizi besithando somlilo se-arc abangaphansi kwamanzi baye bafunda ngokusebenza kwayo ekuthuthukiseni izinzuzo zezomnotho zezithando ze-arc ezingaphansi kwamanzi.Imishini yesinxephezelo samandla kagesi aphansi isetshenziswe kabanzi ku-Submerged arc furnace transformer.
Izixazululo ongakhetha kuzo:
uhlelo 1
Sebenzisa isinxephezelo sesihlungi se-high-voltage (lesi simo siyisinxephezelo esivamile, kodwa umphumela wangempela awuhlangabezani nezimfuneko zedizayini).
Isimo 2
Ngasohlangothini lwe-voltage ephansi, isinxephezelo sesinxephezelo sesinxephezelo sezigaba ezintathu esiguqukayo siyamukelwa.Ngemva kokuba idivayisi yokuhlunga isiqalile ukusebenza, amandla asebenzayo kuma-electrode ezigaba ezintathu zesithando somlilo esingaphansi kwamanzi ayalinganiswa, ukuze kuthuthukiswe isici samandla, kuncishiswe ukungalingani kwamandla ezigaba ezintathu, nokuthuthukisa inkomba yokukhiqiza.
Isikhathi sokuthumela: Apr-13-2023