Yiziphi izinkambu lapho izinsiza zikagesi ze-UPS zisetshenziswa kabanzi?
Imishini yesistimu yokuphakelwa kwamandla ye-UPS iwuhlobo lokuqala lwempahla yolwazi, esetshenziswa kakhulu ekuvikelweni kokuphepha kwezinhlelo zolwazi lwekhompyutha, izinhlelo zokuxhumana, izikhungo zenethiwekhi yedatha yeselula, njll. Embonini enkulu yedatha, imboni enkulu yedatha, ezokuthutha emgwaqeni, imboni yemboni yezezimali. iketango, iketango lemboni yendizamkhathi, njll. Njengesisetshenziswa esibalulekile se-peripheral system yolwazi lwekhompiyutha, isistimu yezokuxhumana kanye nesikhungo senethiwekhi yedatha, ukunikezwa kwamandla okungaphazamiseki kudlala indima ebaluleke kakhulu ekuvikeleni idatha yekhompyutha, ukuqinisekisa ukuzinza kwamandla kagesi wegridi kagesi kanye nemvamisa, ukuthuthukisa ikhwalithi yegridi yamandla, nokuvimbela ukwehluleka kwamandla ngokushesha kanye nokwehluleka kwamandla okungalindelekile ekulimazeni abasebenzisi.indima.
Uhlobo lwesibili lwamandla ezimbonini ze-UPS zomshini wokuphakelwa kwamandla kagesi lusetshenziswa ikakhulukazi emikhakheni yamandla kagesi, insimbi, izinsimbi ezingenayo insimbi, amalahle, i-petrochemical, ukwakhiwa, umuthi, imoto, ukudla, ezempi kanye neminye imikhakha embonini yemishini kagesi yezimboni. , iqinisekisa ukuthi zonke izisetshenziswa zesistimu yezimboni ezishintshayo zamandla, isilawuli kude Ukuthembeka kokuphakelwa kwamandla ezishintshayo kwemboni ye-AC kanye ne-DC kagesi engaphazamiseki njengamathuluzi esistimu yokuphatha, uxhumo lwe-high-voltage circuit breaker, ukuvikelwa kokudlulisa, amadivayisi azenzakalelayo, namadivayisi esignali.Izimpahla zamandla ezingaphazamiseki ezisezingeni lezimboni ziyimikhiqizo ephezulu phakathi kwezinto zamandla ezingaphazamiseki.Kubandakanya ubuchwepheshe bamandla kagesi wokuguqula amandla aphezulu (mhlawumbe izinga le-megawatt), isistimu yokulawula idijithali, ubuchwepheshe bokuphindaphinda uchungechunge lwe-AC, ubuchwepheshe bokucindezelwa kwe-pulse esebenzayo, ubuchwepheshe bokukhiqiza umkhiqizo wamandla aphezulu, njll. Ngokusobala, izinkampani ezinikezela ngogesi ezijwayelekile azikwazi ukungena. le mboni.Izinkampani kuphela ezinobuchwepheshe bamandla kagesi anamandla amakhulu kanye nochungechunge lokuthuthukiswa komkhiqizo, amakhono okukhiqiza kanye nenkonzo, kanye nesipiliyoni esiqoqiwe sokukhiqizwa kwezimboni kanye nesipiliyoni sokufaka isicelo, ezingenza umsebenzi omuhle ekwakhiweni kwezinhlelo zokuphakelwa kwamandla ezimboni ezingaphazamiseki, Ukukhiqiza nokuthengisa izimakethe. amasevisi.
Njengamanje, kunezinhlelo ezine zokucindezelwa kwamanje kwe-harmonic ye-UPS enkulu
uhlelo 1.
I-6-pulse UPS+i-harmonic ye-oda eliphezulu esebenzayo, i-harmonics yamanje ye-oda eliphezulu <5% (umthwalo olinganiselwe), isici samandla okokufaka 0.95.Leli lungiselelo lenza inkomba yokufaka ibe yinhle kakhulu, kodwa ubuchwepheshe bayo abukavuthwa, futhi kunezinkinga ezifana nesinxephezelo samaphutha, isinxephezelo esingaphezulu, njll., ezibangela njengokukhubeka okungamanga noma ukulimala kweswishi yokufaka eyinhloko.Amaphutha obuchwepheshe bokuhlunga obusebenzayo be-THM bujwayelekile
a) Kunenkinga “yesinxephezelo samanga”: ngenxa yokuthi ijubane lokuphendula isinxephezelo lidlula ama-40ms, kunobungozi bokuphepha obungaba khona “yesinxephezelo samanga”.Isibonelo, uma wenza imisebenzi yokusika/uthuma ekunikezeni amandla okufakwayo, noma wenza imisebenzi yokusika/yokuthumela umsebenzi osindayo emaceleni akhuphuka nomfula kanye nangaphansi kokokufaka kwe-UPS, kulula ukubangela "isinxephezelo sokuchezuka".Ukukhanya kwakhanya, kwabangela “ushintsho oluzumayo” kuma-ups power input harmonic current.Uma ibucayi kakhulu, izodala "ukukhubeka okungamanga" kweswishi yokufaka ye-UPS.
b) Ukuthembeka okuphansi: Ngokunikezwa kwamandla okungaphazamiseki nama-pulses angu-6 + isihlungi esisebenzayo, izinga lokuhluleka liphezulu, ngoba ishubhu yokushayela amandla yesilungisi sayo nesiguquli siyishubhu ye-IGBT.Ngokuphambene nalokho, kuma-12-pulse + passive filter UPS, ama-inductors nama-capacitor athembekile asetshenziswa ezihlungini zawo.
c) Yehlisa ukusebenza kahle kohlelo futhi ukhuphule izindleko zokusebenza: ukusebenza kahle kwesistimu yezihlungi ezisebenzayo cishe kungama-93%.Kuxhumo oluhambisanayo lwe-400KVA UPS, ngaphansi kwesimo sokushaja okugcwele kanye nesinxephezelo samanje se-harmonic ye-oda eliphezulu engu-33%, uma inkokhelo kagesi ikhokhwa ngo-0.8 yuan nge-KW*hr=, izindleko zokusebenza ezikhokhwa phakathi nonyaka owodwa zimi kanje.
400KVA*0.07/3=9.3KVA;ukusetshenziswa kukagesi ngonyaka ngu-65407KW.Hr, futhi imali ekhushuliwe kagesi ingu-65407X0.8 yuan=52,000 yuan.
d) Ukwengeza isihlungi esisebenzayo kubiza kakhulu: okokufaka okukhona kwesihlungi esisebenzayo esingu-200 kVA UPS singama-amps angu-303;
Isilinganiso samanje se-Harmonic: 0.33*303A=100A,
Uma okuqukethwe kwamanje kwe-harmonic okokufaka kungaphansi kuka-5%, isinxephezelo samanje kufanele sibalwe ngokuthi okungenani: 100A;
Ukucushwa Kwangempela: Isethi yezihlungi ezisebenzayo ezingu-100 amp.Ngokwesilinganiso samanje samayuan angu-1500-2000 we-ampere, izindleko eziphelele zizokwenyuka ngo-150,000-200,000 yuan, kanti izindleko ze-6-pulse 200KVA UPS zizokhuphuka cishe ngo-60% -80%.
Isimo 2
Adopt 6-pulse amandla angaphazamiseki + 5th harmonic filter.Uma isilungisi samandla esingaphazamiseki siyisigaba sesithathu esilawulwa ngokugcwele sohlobo lwebhuloho elingu-6-pulse rectifier, ama-harmonics akhiqizwa i-akhawunti yokulungisa cishe cishe u-25-33% wawo wonke ama-harmonics, futhi ngemva kokwengeza isihlungi se-harmonic sesi-5, ama-harmonics yehliswe yaba ngaphansi kuka-10%.Isici samandla okokufaka ngu-0.9, esinganciphisa kancane ukulimala kwe-harmonic current kugridi yamandla.Ngalokhu kucushwa, ama-harmonics wamanje okokufaka asemakhulu kakhulu, futhi isilinganiso samandla ejeneretha siyadingeka ukuthi sibe sikhulu kuno-1: 2, futhi kunengozi efihliwe yokwanda okungavamile kokukhishwa kwejeneretha.
Inketho yesi-3
Isikimu esingumgunyathi esingu-12-pulse sisebenzisa isiguquli esishintshayo sesigaba + 6-pulse rectifier sakhiwe ukukhuphuka okuphindwe kabili kwe-6-pulse rectifier:
a) Isilungisi esijwayelekile esingu-6-pulse
b) I-transformer ye-phase-shifted 30-degree + 6-pulse rectifier
Kulungiselelwe i-UPS mbumbulu ye-12-pulse rectifier.Ngaphezulu, ama-harmonics wokufakwa komthwalo ogcwele wamanje abonakala engu-10%.Lokhu kulungiselelwa kunephuzu elilodwa elibucayi lokwehluleka.Lapho ukunikezwa kwamandla okungaphazamiseki kwehluleka, i-harmonic current yesistimu ikhula kakhulu, ibeka engcupheni ukuphepha kwesistimu yokuphakelwa kwamandla.
Okubi okungalungile:
1).Ukusika amakhona kanye nezinto zokwakha zedivayisi yokuqala, isethi yonke yemishini ayitholakali.
2).Uma isilungisi se-UPS sihluleka, sizoguqulwa sibe i-UPS engu-6-pulse, futhi okuqukethwe kwe-harmonic kuzokwanda kakhulu.
3).Futhi ukulawulwa komugqa webhasi we-DC kuwuhlelo lokulawula oluvulekile.Ukwabelana kwamanje okokufaka akukwazi ukuba kuhle kakhulu.I-harmonic current ekulayishweni okukhanyayo isazoba nkulu kakhulu.
4).Ukwandiswa kwesistimu kuzoba nzima kakhulu
5).I-phase-shifting transformer efakiwe ayiwona umkhiqizo wangempela, futhi ukufana nesistimu yasekuqaleni ngeke kube kuhle kakhulu.
6).Indawo yaphansi izoba nkulu uma kuqhathaniswa
7).Ukusebenza kungu-12-15%, okungekuhle njenge-12-pulse UPS.
Inketho yesi-4
Adopt 12-pulse amandla angaphazamiseki + 11-oda isihlungi se-harmonic.Uma isilungisi samandla esingaphazamiseki siyisigaba sesithathu esilawulwa ngokugcwele sohlobo lwe-12-pulse rectifier, ngemva kokwengeza isihlungi se-harmonic se-11, singancishiswa sibe ngaphansi kuka-4.5%, esingasusa ngokuphelele ukulimala kwe-harmonic. okuqukethwe kwamanje kugridi yamandla, futhi isilinganiso senani sithi Isihlungi somthombo siphansi kakhulu.
I-12-pulse UPS+11th isihlungi se-harmonic siyamukelwa, i-harmonic yamanje yokufaka ingu-4.5% (umthwalo olinganiselwe), futhi isici samandla okufaka ngu-0.95.Lolu hlobo lokucushwa luyisixazululo esiphelele nesinokwethenjelwa semboni yokuphakelwa kwamandla kagesi ye-UPS, futhi sidinga ivolumu yegenerator engu-1: 1.4.
Ngokusekelwe ekuhlaziyeni okungenhla, isikimu sokuqeda i-harmonic se-12-pulse rectifier + 11th-oda isihlungi se-harmonic esisebenza kahle, ukwethembeka okuphezulu, ukusebenza okuzinzile nokuthembekile, kanye nokusebenza kwezindleko ezinhle kuyanconywa ekusebenzeni.
Isikhathi sokuthumela: Apr-13-2023