Ndi magawo ati omwe magetsi a UPS amagwiritsidwa ntchito kwambiri?
Zida zamagetsi za UPS ndi mtundu woyamba wa zida zachidziwitso, zomwe zimagwiritsidwa ntchito kwambiri poteteza chitetezo cha makompyuta, machitidwe olankhulana, malo ochezera a pakompyuta, etc. unyolo, Azamlengalenga makampani unyolo, etc. Monga zofunika zotumphukira zida za dongosolo kompyuta zambiri, dongosolo kulankhulana ndi malo deta maukonde, uninterruptible magetsi amagwira ntchito yofunika kwambiri kuteteza deta kompyuta, kuonetsetsa bata la mphamvu gululi voteji ndi pafupipafupi, kuwongolera Ubwino wa gridi yamagetsi, ndikuletsa kutha kwa mphamvu nthawi yomweyo komanso kulephera kwamagetsi mosayembekezereka kuti zisawononge ogwiritsa ntchito.udindo.
Mtundu wachiwiri wa zida zamagetsi zamagetsi za UPS zimagwiritsidwa ntchito kwambiri m'magawo amagetsi, zitsulo, zitsulo zopanda chitsulo, malasha, petrochemical, zomangamanga, mankhwala, magalimoto, chakudya, asitikali ndi zina mumakampani opanga zida zamagetsi. , kuwonetsetsa kuti zida zonse zamagetsi zamagetsi zamagetsi, zakutali Kudalirika kwamagetsi opangira mafakitale amagetsi amagetsi a AC ndi DC osasokoneza magetsi monga zida zamakina akuluakulu, kulumikizana kwamagetsi othamanga kwambiri, kutetezedwa kwa relay, zida zodziwikiratu, ndi zida zamagetsi.Mphamvu zamagetsi zosasunthika zamafakitale ndizinthu zapamwamba pakati pamagetsi osasunthika.Zimaphatikizapo ukadaulo wamagetsi amagetsi amphamvu kwambiri (mwina megawatt-level) kutembenuka kwamphamvu, makina owongolera digito, ukadaulo wa AC mndandanda wa redundancy, ukadaulo wopondereza waposachedwa, ukadaulo wopangira mphamvu zamagetsi, ndi zina zambiri. Mwachiwonekere, makampani wamba magetsi sangathe kulowa. makampani izi.Makampani okhawo omwe ali ndi luso lamphamvu lamagetsi amagetsi ndi gulu lachitukuko chazinthu, kupanga ndi kuthekera kwautumiki, komanso kusonkhanitsa lolingana kupanga mafakitale ndi zinachitikira ntchito, akhoza kuchita ntchito yabwino mu kamangidwe ka mafakitale uninterruptible magetsi kachitidwe , Kupanga ndi malonda a msika. ntchito.
Pakadali pano, pali njira zinayi zakuponderezedwa kwakukulu kwa UPS
plan 1.
6-pulse UPS + yogwira zosefera zapamwamba kwambiri za harmonic, zolowetsa zamakono zamakono <5% (zotengera katundu), mphamvu yolowera 0.95.Kukonzekera kumeneku kumapangitsa chizindikiro cholowetsa kukhala chabwino kwambiri, koma teknoloji yake ndi yachibwana, ndipo pali mavuto monga kubweza zolakwika, kubweza ndalama zambiri, ndi zina zotero, zomwe zimayambitsa monga kupunduka kwabodza kapena kuwonongeka kwa kusintha kwakukulu.Zowonongeka zaukadaulo wa THM yogwira ntchito za harmonic ndizodziwika
a) Pali vuto la "malipiro abodza": chifukwa liwiro la kuyankha kwamalipiro limaposa 40ms, pali ngozi yotetezeka ya "malipiro abodza".Mwachitsanzo, pochita ntchito zodula / kutumiza pamagetsi opangira magetsi, kapena kuchita ntchito zolemetsa kwambiri zodula / kutumiza kumtunda ndi kumunsi kwa mtsinje wa UPS, ndizosavuta kuyambitsa "chipukuta misozi".Kuwala kunabwera, ndikupangitsa "kusintha kwadzidzidzi" mu ups power input harmonic current.Zikakhala zovuta kwambiri, zitha kuyambitsa "kuyenda kwabodza" kwa switch ya UPS.
b) Kudalirika kochepa: Kwa magetsi osasunthika omwe ali ndi 6 pulses + yogwira fyuluta, kulephera kumakhala kwakukulu, chifukwa chubu choyendetsa magetsi cha rectifier yake ndi chosinthira ndi chubu cha IGBT.M'malo mwake, kwa 12-pulse + passive UPS fyuluta, ma inductors odalirika kwambiri ndi ma capacitor amagwiritsidwa ntchito pazosefera zake.
c) Chepetsani magwiridwe antchito ndikuwonjezera ndalama zogwirira ntchito: magwiridwe antchito a zosefera yogwira ndi pafupifupi 93%.Mu 400KVA UPS yolumikizana yofananira, pansi pa chiwongola dzanja chonse ndi 33% kulowetsa chipukuta misozi chapamwamba kwambiri, ngati chindapusa chamagetsi chikulipiridwa pa 0.8 yuan pa KW*hr=, ndalama zoyendetsera ntchito zomwe zaperekedwa mkati mwa chaka chimodzi ndi motere.
400KVA*0.07/3=9.3KVA;magetsi pachaka ndi 65407KW.Hr, ndipo chiwongola dzanja chowonjezeka ndi 65407X0.8 yuan=52,000 yuan.
d) Kuwonjezera fyuluta yogwira ndikokwera mtengo kwambiri: kulowetsa mwadzina kwa fyuluta yogwira 200 kVA UPS ndi 303 amps;
Kuyerekeza kwapano kwa Harmonic: 0.33 * 303A = 100A,
Ngati athandizira harmonic panopa zili zosakwana 5%, chipukuta misozi panopa ayenera masamu monga osachepera: 100A;
Kusintha Kwenieni: Gulu la zosefera 100 amp zogwira ntchito.Malinga ndi kuyerekezera kwaposachedwa kwa yuan 1500-2000 pa ampere, mtengo wonse udzakwera ndi 150,000-200,000 yuan, ndipo mtengo wa 6-pulse 200KVA UPS udzakwera pafupifupi 60% -80%.
Nkhani 2
Adopt 6-pulse uninterruptible power supply + 5th harmonic fyuluta.Ngati cholumikizira chamagetsi chosasunthika ndi gawo lachitatu lowongolera bwino mlatho-mtundu wa 6-pulse rectifier, ma harmonics opangidwa ndi akaunti yokonzanso pafupifupi 25-33% ya ma harmonics onse, ndipo mutawonjezera 5th harmonic fyuluta, ma harmonics amakhala. yachepetsedwa mpaka 10%.Mphamvu yolowera ndi 0.9, yomwe imatha kuchepetsa pang'ono kuwonongeka kwa ma harmonic ku gridi yamagetsi.Ndi kasinthidwe kameneka, ma harmonics omwe akulowetsa panopa akadali aakulu, ndipo chiwerengero cha jenereta chiyenera kukhala chachikulu kuposa 1: 2, ndipo pali ngozi yobisika ya kuwonjezeka kwachilendo kwa jenereta.
Njira 3
Chiwembu chabodza cha 12-pulse chogwiritsa ntchito chosinthira gawo + 6-pulse rectifier chimapangidwa ndi ma 6-pulse rectifier:
a) Wokhazikika wa 6-pulse rectifier
b) Chosinthira magawo 30-degree + 6-pulse rectifier
Kukonza UPS yabodza ya 12-pulse rectifier.Pamwamba, ma harmonics azomwe akulowetsamo akuwoneka kuti ndi 10%.Kusinthaku kuli ndi vuto limodzi lolephera.Mphamvu yosasunthika ikalephera, mphamvu yolumikizira yamagetsi imakwera kwambiri, ndikuyika pachiwopsezo chitetezo chamagetsi.
Zoyipa zazikulu:
1).Kudula ngodya ndi zipangizo za chipangizo choyambirira, zida zonse zikusowa.
2).Ngati kukonzanso kwa UPS kulephera, kumasinthidwa kukhala 6-pulse UPS, ndipo zomwe zili mu harmonic zidzakula kwambiri.
3).Ndipo kuwongolera kwa mzere wa basi ya DC ndi njira yotseguka yowongolera.Kugawana kwapano sikungakhale kwabwino kwambiri.Mphamvu ya harmonic pa katundu wopepuka idzakhalabe yaikulu kwambiri.
4).Kukula kwadongosolo kumakhala kovuta kwambiri
5).Transformer yosinthira gawo yomwe idayikidwa sizinthu zoyambirira, ndipo machesi ndi dongosolo loyambirira silingakhale labwino kwambiri.
6).Malo apansi adzakhala aakulu ndithu
7).Kuchita kwake ndi 12-15%, zomwe sizili bwino ngati 12-pulse UPS.
Njira 4
Adopt 12-pulse uninterruptible power supply + 11-order harmonic fyuluta.Ngati cholumikizira chamagetsi chosasunthika chili chowongolera chamtundu wa 12-pulse rectifier cha magawo atatu, mutawonjezera 11th-order harmonic fyuluta, chitha kuchepetsedwa kukhala pansi pa 4.5%, chomwe chingathe kuthetsa kuvulaza kwa harmonic. zomwe zilipo panopa ku gridi yamagetsi, ndipo chiŵerengero chamtengo ndi Chosefera gwero ndichotsika kwambiri.
12-pulse UPS + 11th harmonic fyuluta imatengedwa, zolowetsa panopa ndi 4.5% (zotengera katundu), ndipo mphamvu yolowera ndi 0.95.Kukonzekera kwamtunduwu ndi yankho lathunthu komanso lodalirika lamakampani opanga magetsi a UPS, ndipo amafuna voliyumu ya jenereta ya 1: 1.4.
Kutengera kusanthula pamwambapa, pulogalamu yochotsa ma harmonic ya 12-pulse rectifier + 11th-order harmonic fyuluta yokhala ndi magwiridwe antchito abwino, kudalirika kwakukulu, magwiridwe antchito okhazikika komanso odalirika, komanso magwiridwe antchito abwino amalimbikitsidwa pochita.
Nthawi yotumiza: Apr-13-2023