Ulwazi oluyisisekelo lwabasebenzisi
Ukuphathwa kwendle okubalulekile kwasekhaya kwenkampani yokuhlanza amanzi angcolile, ingxenye yokushintsha amandla kagesi yolayini wokuhlanza amanzi angcolile isebenzisa ama-DC variable frequency drive motors, ane-1000KVA2, 630KVA transformers.Umdwebo wesistimu yokunikezwa kwamandla umi kanje:
Idatha yangempela yokusebenza
Amandla okukhipha isiqalisi esithambile esingu-1000KVA ngu-860KVA, isici samandla esimaphakathi ngu-PF=0.83, ukusebenza kwamanje ngu-1250A, ukusebenza kwamanje ngu-630KVA, isici samandla ngu-PF=0.87, kanti okwamanje okusebenzayo ngu-770A.Ngakho ingqikithi yamandla ingaba ngu-0.84 kuphela.
Ukuhlaziywa Kwesimo Sesistimu Yamandla
Umthwalo oyinhloko we-converter ballast yi-6 single-pulse ballasts.Imishini ye-ballast ikhiqiza inani elikhulu le-pulse yamanje emsebenzini wokuguqula i-AC ibe yi-DC.Iwumthombo wamanje we-pulse ovamile futhi ifakwa kugridi yamandla.Ama-harmonic currents abangela i-pulsed yamanje kagesi osebenzayo ekuphazamisekeni okuyisici kwegridi yamandla, okuholela ekulahlekeni kohlaka lwamandla kagesi okusebenza kanye nowamanje, kubeka engcupheni ikhwalithi nokusebenza kokuphepha kokushintsha izinto zikagesi, ukwandisa ukulahleka kolayini kanye nokuphambuka kwamandla kagesi, futhi kubangele imiphumela engemihle igridi yamandla nezitshalo zamandla ngokwazo Zinomthelela.
Isixhumi esibonakalayo sekhompiyutha yesilawuli sohlelo (i-PLC) siyazwela ekuhlanekeni kwe-harmonic kagesi osebenzayo wokushintshwa kwamandla kagesi.Ngokuvamile kubalulwe ukuthi ingqikithi yokulahleka kozimele we-voltage esebenzayo yamanje (THD) ingaphansi kuka-5%, kanye ne-voltage esebenzayo yamanje ye-pulse Uma izinga lohlaka liphezulu kakhulu, iphutha lokusebenza kohlelo lokulawula lingaholela ekuphazamisekeni ukukhiqiza noma ukusebenza, okuholela engozini enkulu yesibopho sokukhiqiza.Ngakho-ke, isihlungi sokunxeshezelwa kwamandla asebenzayo ane-voltage ephansi esinomsebenzi wokucindezela wamanje we-pulse kufanele sisetshenziselwe ukucindezela i-pulse current yesistimu, sinxephezele umthwalo osebenzayo, futhi sithuthukise isici samandla.
Hlunga uhlelo lokwelashwa kwesinxephezelo samandla asebenzayo
Imigomo yokubusa
Idizayini yempahla yesinxephezelo yesihlungi ihlangabezana nezidingo zokucindezelwa kwe-harmonic kanye nokuphathwa kokucindezelwa kwamandla okusebenzayo.
Ngaphansi kwemodi yokusebenza yesistimu engu-0.4KV, ngemva kokuthi isisetshenziswa sesinxephezelo sesihlungi sesiqalile ukusebenza, ishayela liyacindezelwa, futhi isilinganiso samandla sanyanga zonke sicishe sibe ngu-0.92.
I-high-order harmonic resonance, i-resonance overvoltage, kanye ne-overcurrent okubangelwa ukuxhuma kumjikelezo wegatsha lesinxephezelo sesihlungi ngeke kwenzeke.
Umklamo Ulandela Amazinga
Ikhwalithi yamandla Ama-harmonics egridi yomphakathi GB/T14519-1993
Ikhwalithi yamandla Ukushintshashintsha kwe-Voltage nokucwayiza kwe-GB12326-2000
Izimo zobuchwepheshe ezijwayelekile zedivayisi yesinxephezelo samandla asebenzayo aphansi-voltage GB/T 15576-1995
Idivayisi yesinxephezelo samandla asebenzayo we-low-voltage JB/T 7115-1993
Izimo zobuchwepheshe zesinxephezelo samandla asebenzayo JB/T9663-1999 “Isilawuli sesinxephezelo esizenzakalelayo samandla asebenzayo aphansi-voltage” kusukela enanini eliphezulu lomkhawulo wamanje we-harmonic wamandla aphansi kanye nempahla kagesi GB/T17625.7-1998
Imigomo ye-Electrotechnical Amandla capacitor GB/T 2900.16-1996
I-voltage ephansi ye-shunt capacitor GB/T 3983.1-1989
I-Rector GB10229-88
I-Reactor IEC 289-88
I-oda yesilawuli sesinxephezelo samandla asebenzayo aphansi asebenzayo izimo zobuchwepheshe DL/T597-1996
Ibanga eliphansi le-voltage yokuvikela indawo kagesi engu-GB5013.1-1997
I-low-voltage ephelele yokushintsha kanye nemishini yokulawula GB7251.1-1997
Design imibono
Ngokwesimo esithile senkampani, isethi yohlelo lwesinxephezelo samandla asebenzayo wesihlungi samandla esiguquguqukayo esicubungula ngokugcwele isici samandla omthwalo kanye nokucindezela kwamanje kwe-pulse lakhiwe, futhi isethi yesihlungi samandla kagesi aphansi afakwa ku-voltage engezansi engu-0.4kV. ohlangothini lwe-transformer yenkampani isinxephezelo samandla asebenzayo ukuze kucindezelwe ukushaya kwenhliziyo, ukunxephezela umthwalo osebenzayo, nokuthuthukisa isici samandla.
I-ballast ikhiqiza i-6K-1 oda i-pulse current ngesikhathi sokusebenza kwesiguquli, futhi isebenzisa ukulandelana kwekhodi yeqabunga eduze kuka-5250Hz no-7350Hz ukuze kwenziwe ukuguqulwa kokuhlakazeka.Ngakho-ke, idizayini yesinxephezelo samandla esisebenzayo yesihlungi sesithando sokungenisa imvamisa emaphakathi kufanele ithathe u-250Hz, 350Hz kanye nomklamo wamafrikhwensi njengokuqondisiwe, ukuze kuqinisekiswe ukuthi igatsha lesinxephezelo lesihlungi lingacindezela ngempumelelo isinxephezelo samanje se-pulse, futhi ngesikhathi esifanayo. isikhathi cindezela umthwalo osebenzayo futhi uthuthukise i-Power Factor.
umsebenzi wokuklama
Isici samandla esibanzi somugqa wokukhiqiza isiguquli esingu-1000KVA sinxeshezelwa sisuka ku-0.8 siye cishe ku-0.95.Imishini yesinxephezelo yesihlungi idinga ukufakwa ngevolumu engu-380KVar, ehlukaniswe ngamaqembu amane, ngalinye livalwa ngokuzenzakalelayo futhi linqanyuliwe, linxephezela ukumelana nokugoqa ohlangothini oluphansi lwe-voltage ye-transformer, futhi inevolumu yokulungisa isinyathelo. ye-45KVAR, engahlanganiswa nezidingo zamandla okukhipha umugqa wokukhiqiza.Isici samandla esibanzi sinxeshezelwa ukusuka ku-0.8 kuye ku-0.95.Imishini yesinxephezelo yesihlungi idinga ukufakwa ngevolumu engu-310KVar, futhi amaqembu amane anqanyulwa ngokuzenzakalelayo ukuze kunxeshezelwe ukuvuthwa okuseceleni okuphansi kwe-transformer, futhi ivolumu ilungiswa ku-26KVAR ukuze ihlangabezane nezidingo ze-voltage yokusebenza yomugqa wokukhiqiza.
Ukuhlaziywa komthelela ngemva kokufakwa kwesinxephezelo sesihlungi
Ngo-Agasti 2010, idivayisi yesinxephezelo samandla asebenzayo esisefa inverter yafakwa futhi yaqala ukusebenza.Idivayisi ilandelela ngokuzenzakalelayo ushintsho lomthwalo we-inverter, icindezela ama-harmonics we-oda eliphezulu ngesikhathi sangempela, inxephezela amandla asebenzayo, futhi ithuthukisa isici samandla.imininingwane kanjena:
Ngemva kokuthi idivayisi yesinxephezelo sesihlungi isiqalile ukusetshenziswa, ijika lesici samandla ngemva kokusetshenziswa kwesinxephezelo sesihlungi cishe singu-0.97 (ingxenye ephakanyisiwe icishe ibe ngu-0.8 lapho kukhishwa idivayisi yesinxephezelo sesihlungi)
Layisha ukusebenza
Amanje asetshenziswa i-1000KVA transformer yehlisiwe isuka ku-1250A iye ku-1060A, yehle ngo-15%;yamanje esetshenziswa i-630KVA transformer yehlisiwe isuka ku-770A iye ku-620A, yehle ngo-19%.Ngemva kwesinxephezelo, inani lokunciphisa ukulahlekelwa kwamandla ngu-WT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=24×{(0.85×2000)/2000}2×0.4≈16 (kw h) Kufomula, i-Pd ukulahleka kwe-short-circuit ye-transformer, engu-24KW, futhi ukonga konyaka wezindleko zikagesi ngu-16*20*30*10*0.7=67,000 yuan (ngokusekelwe ekusebenzeni amahora angu-20 a usuku, izinsuku ezingu-30 ngenyanga, izinyanga ezingu-10 ngonyaka, 0.7 yuan kWh ngayinye).
Layisha ukusebenza
Amanje asetshenziswa i-1000KVA transformer yehlisiwe isuka ku-1250A iye ku-1060A, yehle ngo-15%;yamanje esetshenziswa i-630KVA transformer yehlisiwe isuka ku-770A iye ku-620A, yehle ngo-19%.Ngemva kwesinxephezelo, inani lokunciphisa ukulahlekelwa kwamandla ngu-WT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=24×{(0.85×2000)/2000}2×0.4≈16 (kw h) Kufomula, i-Pd ukulahleka kwe-short-circuit ye-transformer, engu-24KW, futhi ukonga konyaka wezindleko zikagesi ngu-16*20*30*10*0.7=67,000 yuan (ngokusekelwe ekusebenzeni amahora angu-20 a usuku, izinsuku ezingu-30 ngenyanga, izinyanga ezingu-10 ngonyaka, 0.7 yuan kWh ngayinye).
Isikhathi sokuthumela: Apr-14-2023