Ulwazi oluyisisekelo lwabasebenzisi
Imboni kasimende ikhiqiza ukhonkolo ohlukahlukene wokwakha.Inkampani inemigqa yokukhiqiza emi-3.Ugesi oshintshayo usebenzisa ama-inverter drive motors, ama-2000KVA2, ama-630KVA transformer, futhi i-transformer ngayinye ifakwe ikhabethe lesinxephezelo se-capacitor ohlangothini oluphansi lwengcindezi.Umdwebo wesistimu yokunikezwa kwamandla umi kanje:
Idatha yangempela yokusebenza
Amandla okukhipha isiqalisi esithambile se-2000KVA transformer ngu-1720KVA, isici samandla esimaphakathi ngu-PF=0.83, ukusebenza kwamanje ngu-2500A, amandla angu-530KVA630KVA isiguquli, isici samandla esimaphakathi ngu-PF=0.87, kanti okwamanje okusebenzayo ngu-770A.Ikhabethe lesinxephezelo samandla asebenzayo ngaphansi kwesiguquli ngasinye livame ukuba nohambo lwamandla, ukuvuza kukawoyela we-capacitor, nolwazi lwesibonisi sephaneli yokulawula engavumeli ukusebenza okungavamile.Ngakho-ke, isici samandla esibanzi singu-0.84 kuphela, futhi isijeziso samandla esisebenzayo singaba ngu-20,000 ngoJanuwari.Futhi izinjini zokukhiqiza kanye neziqalisi ezithambile kwesinye isikhathi zingaphazamisa ukukhiqiza.
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.
Lapho ibhange le-capacitor yesinxephezelo samandla asebenzayo liqala ukusebenza, ngenxa yokuthi isici samanje se-pulse i-impedance yebhange le-capacitor lincane, inani elikhulu le-pulse current lingeniswa ekubunjweni kwe-capacitor, futhi inani lamanje landa ngokushesha, lithinta kakhulu impilo yalo yesevisi. .Ngakolunye uhlangothi, lapho i-pulse capacitor yamanje yebhange le-capacitor ilingana ne-pulse inductor yamanje yesofthiwe yesistimu, ukwanda kwamandla e-harmonic (izikhathi ezingu-2-10) kuzobangela ukuthi i-capacitor ishise futhi iyibhubhise, futhi i-pulse current izobangela ukuthi imvamisa yamandla okukhiphayo ishintshe.I-waveform ye-sinusoidal iphumile ohlakeni, okuholela kugagasi elicijile elimise okwesaha, futhi lizobangela ukukhipha ingxenye yento yongqimba evikelayo, ngaleyo ndlela kusheshise ukumbozwa kwento yongqimba oluvikelayo, futhi kubangele umonakalo ku-capacitor.Ngakho-ke, ikhabhinethi yesinxephezelo samandla asebenzayo we-capacitor ayikwazi ukusetshenziselwa isinxephezelo samandla we-inverter, futhi isihlungi esinomsebenzi wokucindezela wamanje we-pulse kufanele sikhethelwe isinxephezelo samandla asebenzayo aphansi we-voltage.
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
umqondo wokuklama
Ngokwesimo esithile senkampani, isici samandla kanye nokucindezelwa kwe-pulse kwamanje kubhekwa esinxephezelweni sesihlungi se-inverter power supply, kanti imishini yesinxephezelo yokuhluleka kwesihlungi isethwe ohlangothini lwe-voltage engezansi engu-0.4kV ye-transformer, engacindezela. i-pulse current futhi inxephezela ukuthuthukiswa kwesici samandla.
Ku-converter, i-ballast ikhiqiza ama-pulse currents athuthukisiwe angu-6K-1 ngokuya ngokugeleza kwamanje kochungechunge lwe-Fourier, bese ikhiqiza ama-pulse currents athuthukile angu-5, ngalinye libe ngu-250Hz kanye no-7350Hz.Ngakho-ke, lapho uklama isinxephezelo samandla asebenzayo weziko lokungeniswa kwefrikhwensi emaphakathi, kuyadingeka ukuthi udizayine amaza azungeze u-250Hz no-350Hz ukuze kuqinisekiswe ukuthi igatsha lesinxephezelo lesihlungi lingacindezela ngempumelelo ama-pulse currents, linxephezele imithwalo esebenzayo ngesikhathi esifanayo, futhi lithuthukise isici samandla.
umsebenzi wokuklama
Isici samandla esibanzi solayini wamandla oguquguqukayo obhanqiwe we-2000kV AC transformer inxeshezelwa ukusuka ku-0.8 kuya ku-0.95.Impahla yesinxephezelo yesihlungi kufanele ifakwe umthamo ongu-760kV, futhi iguqule ngokuzenzakalelayo ibe amasethi amavolumu angu-8, futhi isethi eyodwa ibambisane nesinxephezelo esimazombezombe ohlangothini lwe-voltage engezansi ye-transformer.Umsebenzi wokulungiswa kwekilasi yi-45KVAR, engahlangabezana nezidingo ezihlukahlukene zamandla omugqa wokukhiqiza.Isici samandla esibanzi solayini wokuguqulela obhanqiwe we-630kV sinxeshezelwe, futhi uhla lwesinxephezelo lusuka ku-0.8 ukuya ku-0.95.Impahla yesinxephezelo yesihlungi kufanele ifakwe ivolumu engu-310kV, eguqulwa ngokuzenzakalelayo ibe amasethi amane amavolumu, futhi isethi eyodwa isebenzisana nesiphikisayo esimazombezombe ohlangothini lwamandla kagesi aphansi we-transformer ukuze kunxeshezelwe.Umsebenzi wokulungiswa kwekilasi yi-26KVAR, engahlangabezana nezidingo ezihlukahlukene zamandla omugqa wokukhiqiza.Idizayini yesikimu iqinisekisa ngokugcwele ukuthi isici samandla sidlula u-0.95.
Ukuhlaziywa komthelela ngemva kokufakwa kwesinxephezelo sesihlungi
NgoJulayi 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 ama-transformer angu-2000KVA ancishisiwe asuka ku-2500A kuya ku-2120A, ukwehla ngo-15%;yamanje esetshenziswa ama-transformer angu-630KVA iyancipha isuka ku-770A iye ku-620A, yehle ngo-19%.Ngemva kwesinxephezelo,thepowerlossreductionvalueisWT=△Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=50×{(0.85×4500)/4500}2×0.4≈34(kw h) Esikhathini ifomula, i-Pd ukulahleka kwe-short-circuit ye-transformer, engu-50KW, futhi ukonga konyaka wezindleko zikagesi ngu-34*20*30*10*0.7=142,800 yuan (ngokusekelwe ekusebenzeni amahora angu-20 ngosuku, izinsuku ezingu-30 ngenyanga. , izinyanga eziyi-10 ngonyaka, i-yuan engu-0.7 kWh ngayinye).
isimo amandla factor
Ingqikithi yenkomba yobunjiniyela bamandla yenkampani inyuke isuka ku-0.8 yaya ku-0.95, futhi inkomba yenyanga yobunjiniyela bamandla isalokhu iku-0.96-0.98, ikhuphuka isuka kumayuan angaphezu kuka-20,000 ngenyanga iye ngaphezu kuka-6,000-10,000 yuan ngenyanga.
Isinxephezelo samandla asebenzayo aphansi we-voltage yesihlungi sokuguqula imvamisa sinamandla okucindezela i-pulse yamanje futhi sinxephezele umthwalo osebenzayo, ukuxazulula inkinga yesijeziso samandla asebenzayo, ukwandisa umthamo wokukhipha we-transformer, ukunciphisa ukulahlekelwa kwesinxephezelo samandla asebenzayo, ukwandisa umkhiqizo, futhi ilethe izinzuzo enkampanini Izinzuzo zezomnotho ezisobala sezikhiqiziwe, futhi ukutshalwa kwezimali kwephrojekthi yekhasimende kungaphansi kokutholwa konyaka owodwa kokutshalwa kwezimali kwephrojekthi.Ngakho-ke, inkampani yaneliseke kakhulu ngesinxephezelo samandla esisebenzayo sesihlungi se-inverter, futhi izokwethula amakhasimende athile esikhathini esizayo.
Isikhathi sokuthumela: Apr-13-2023