Cov ntaub ntawv tseem ceeb ntawm cov neeg siv
Lub tuam txhab cement tsim ntau yam kev tsim vaj tsev.Lub tuam txhab muaj 3 cov kab ntau lawm.Lub tshuab hluav taws xob hloov hluav taws xob siv lub tshuab hluav taws xob inverter, 2000KVA2, 630KVA transformers, thiab txhua qhov hloov pauv tau nruab nrog lub capacitor them nyiaj txee rau sab hauv qab siab.Daim duab ntawm lub hwj chim mov system yog raws li nram no:
Cov ntaub ntawv ua haujlwm tiag tiag
Cov zis hluav taws xob ntawm qhov muag muag rau 2000KVA transformer yog 1720KVA, qhov nruab nrab lub zog yog PF = 0.83, ua haujlwm tam sim no yog 2500A, lub zog yog 530KVA630KVA transformer, qhov nruab nrab lub zog yog PF = 0.87, thiab qhov ua haujlwm tam sim no yog 770A.Lub reactive fais fab nyiaj them txee nyob rau hauv txhua lub transformer feem ntau muaj lub hwj chim mus ncig ua si, capacitor roj to, thiab tswj vaj huam sib luag tso saib cov ntaub ntawv uas tsis tso cai rau kev khiav hauj lwm txawv txav.Yog li ntawd, lub zog loj tshaj plaws tsuas yog 0.84, thiab lub hwj chim reactive raug nplua yog txog 20,000 nyob rau lub Ib Hlis.Thiab cov kab ntau lawm thiab cov pib muag muag tuaj yeem cuam tshuam kev tsim khoom.
Power System Situation Analysis
Lub ntsiab load ntawm lub converter ballast yog 6 ib leeg-pulse ballasts.Cov khoom siv ballast ua rau muaj ntau cov mem tes tam sim no hauv kev ua haujlwm ntawm kev hloov AC rau DC.Nws yog ib qho khoom siv hluav taws xob tam sim no thiab nkag mus rau hauv daim phiaj hluav taws xob.Harmonic tam sim no ua rau lub zog ua haujlwm tam sim no mus rau cov yam ntxwv impedance ntawm daim phiaj hluav taws xob, ua rau lub cev poob ntawm kev ua haujlwm voltage thiab tam sim no, ua rau muaj kev phom sij rau kev ua haujlwm zoo thiab kev nyab xeeb ntawm kev hloov cov khoom siv hluav taws xob, nce kab poob thiab ua haujlwm voltage sib txawv, thiab ua rau muaj kev cuam tshuam tsis zoo. daim phiaj fais fab thiab fais fab nroj tsuag lawv tus kheej Influence.
Qhov program controller computer interface (PLC) rhiab heev rau qhov kev sib haum xeeb ntawm kev ua haujlwm voltage ntawm lub zog hloov hluav taws xob.Nws yog feem ntau hais tias tag nrho cov mem tes tam sim no ua hauj lwm voltage thav duab poob (THD) yog tsawg dua 5%, thiab tus neeg pulse tam sim no ua hauj lwm voltage Yog hais tias tus ncej tus nqi siab dhau lawm, kev khiav hauj lwm yuam kev ntawm kev tswj yuav ua rau muaj kev cuam tshuam ntawm kev tsim khoom lossis kev ua haujlwm, ua rau muaj kev cuam tshuam loj ntawm kev tsim khoom.
Thaum lub reactive fais fab nyiaj them nyiaj capacitor bank yog muab tso rau hauv lub lag luam, vim hais tias tus mem tes tam sim no yam ntxwv impedance ntawm lub capacitor bank yog me me, ib tug loj npaum li cas ntawm cov mem tes tam sim no tau nkag mus rau hauv lub capacitor muaj pes tsawg leeg, thiab cov nyiaj tam sim no nthuav dav, cuam tshuam rau nws lub neej kev pab cuam. .Ntawm qhov tod tes, thaum lub mem tes tam sim no capacitor ntawm lub txhab nyiaj capacitor yog sib npaug rau qhov sib npaug pulse tam sim no inductor ntawm lub kaw lus software, qhov nce hauv kev sib haum xeeb tam sim no (2-10 zaug) yuav ua rau lub capacitor overheat thiab rhuav tshem nws, thiab pulse tam sim no yuav ua rau qhov zaus ntawm cov zis hluav taws xob hloov pauv.Lub sinusoidal waveform yog tawm ntawm lub thav duab, uas ua rau ib tug saw-hlau-zoo li tus nthwv dej, thiab yuav ua rau ib feem ntawm cov ntaub ntawv insulating txheej, yog li ua kom lub embrittlement ntawm cov insulating txheej khoom, thiab ua rau lub capacitor puas.Yog li ntawd, lub capacitor reactive fais fab nyiaj them txee tsis tuaj yeem siv rau inverter fais fab nyiaj them, thiab lub lim nrog mem tes tam sim no kev ua haujlwm yuav tsum raug xaiv rau cov nqi hluav taws xob qis reactive zog.
Lim reactive zog them nyiaj kho mob txoj kev npaj
Cov hom phiaj kev tswj hwm
Kev tsim cov khoom siv lim dej ua tau raws li qhov yuav tsum tau muaj ntawm kev sib haum xeeb kev sib tsoo thiab kev tswj xyuas lub zog reactive.
Raws li 0.4KV qhov system ua haujlwm, tom qab cov khoom siv lim dej tau muab tso rau hauv kev ua haujlwm, cov mem tes tam sim no raug txwv, thiab lub hli nruab nrab lub zog yog nyob ib puag ncig 0.92.
High-order harmonic resonance, resonance overvoltage, thiab overcurrent tshwm sim los ntawm kev txuas mus rau lub lim nyiaj them nyiaj ceg Circuit Court yuav tsis tshwm sim.
Tsim raws li tus qauv
Lub hwj chim zoo Public grid harmonics GB / T14519-1993
Lub zog zoo Voltage fluctuation thiab flicker GB12326-2000
General technical tej yam kev mob ntawm low-voltage reactive hwj chim them nyiaj ntaus ntawv GB / T 15576-1995
Tsawg-voltage reactive fais fab nyiaj them nyiaj ntaus ntawv JB / T 7115-1993
Reactive fais fab nyiaj them rau cov kev mob JB/T9663-1999 "Low-voltage reactive fais fab tsis siv neeg them nyiaj" los ntawm high-order harmonic tam sim no txwv tus nqi qis-voltage fais fab thiab cov khoom siv hluav taws xob GB / T17625.7-1998
Cov ntsiab lus Electrotechnical Fais Fab Capacitor GB / T 2900.16-1996
Tsawg voltage shunt capacitor GB / T 3983.1-1989
Reactor GB10229-88
IEC 289-88 Reactor Ua Haujlwm
Tsawg-voltage reactive fais fab nyiaj them nyiaj tswj kev txiav txim kev mob DL / T597-1996
Tsawg-voltage hluav taws xob tiv thaiv qib GB5013.1-1997
Tsawg-voltage ua tiav switchgear thiab tswj cov cuab yeej GB7251.1-1997
tswv yim ntawm kev tsim
Raws li cov xwm txheej tshwj xeeb ntawm lub tuam txhab, lub zog qhov tseem ceeb thiab cov mem tes tam sim no raug txiav txim siab hauv cov khoom siv lim dej ntawm cov khoom siv hluav taws xob inverter, thiab cov khoom siv lim tsis ua haujlwm raug teeb tsa ntawm 0.4kV hauv qab voltage sab ntawm lub transformer, uas tuaj yeem cuam tshuam. cov mem tes tam sim no thiab them nyiaj rau kev txhim kho ntawm lub hwj chim.
Nyob rau hauv lub converter, lub ballast generates 6K-1 advanced mem tes tam sim no raws li Fourier series tam sim no ntws, thiab ces generates 5 advanced mem tes tam sim no, txhua ntawm txog 250Hz thiab 7350Hz.Yog li ntawd, thaum tsim reactive fais fab nyiaj them rau nruab nrab zaus induction furnaces, nws yog tsim nyog los tsim frequencies nyob ib ncig ntawm 250Hz thiab 350Hz los xyuas kom meej tias lub lim them nyiaj ceg yuav zoo suppress pulse tam sim no, compensate reactive loads tib lub sij hawm, thiab txhim kho lub hwj chim yam.
txoj haujlwm tsim
Lub zog loj tshaj plaws ntawm cov khub inverter fais fab kab ntawm 2000kV AC transformer yog them los ntawm 0.8 txog 0.95.Cov khoom siv lim dej yuav tsum tau nruab nrog lub ntim ntawm 760kV, thiab hloov pauv mus rau hauv 8 pawg ntawm cov ntim, thiab ib txheej koom tes nrog cov nyiaj them nyiaj winding nyob rau hauv qab voltage sab ntawm lub transformer.Kev ua haujlwm ntawm kev hloov kho hauv chav kawm yog 45KVAR, uas tuaj yeem ua tau raws li ntau lub zog xav tau ntawm cov kab ntau lawm.Lub zog loj tshaj plaws ntawm 630kV transformer paired converter kab tau raug them, thiab cov nyiaj them ntau yog los ntawm 0.8 txog 0.95.Cov khoom siv lim dej yuav tsum tau nruab nrog 310kV ntim, uas tau hloov pauv mus rau plaub pawg ntawm cov ntim, thiab ib lub teeb koom tes nrog cov winding resistor nyob rau hauv qab voltage sab ntawm transformer rau them nyiaj.Kev ua haujlwm ntawm kev hloov kho hauv chav kawm yog 26KVAR, uas tuaj yeem ua tau raws li ntau lub zog xav tau ntawm cov kab ntau lawm.Lub tswv yim tsim tag nrho lav tias lub zog muaj zog tshaj 0.95.
Kev tsom xam cov nyhuv tom qab kev teeb tsa ntawm cov nyiaj lim dej
Nyob rau hauv Lub Xya hli ntuj 2010, lub inverter filtering reactive zog them nyiaj ntaus ntawv raug ntsia thiab muab tso rau hauv lub lag luam.Cov cuab yeej cia li taug qab qhov kev hloov pauv ntawm lub inverter, suppresses high-order harmonics nyob rau hauv lub sij hawm ntawm lub sij hawm, compensates reactive zog, thiab txhim kho lub hwj chim.cov ntsiab lus raws li hauv qab no:
Tom qab cov cuab yeej lim dej tau muab tso rau hauv kev siv, lub zog hloov pauv nkhaus tom qab cov cuab yeej lim dej tau muab tso rau hauv kev siv yog li 0.97 (qhov tsa ceg yog li 0.8 thaum lub lim nyiaj them nyiaj raug tshem tawm)
Kev ua haujlwm thauj khoom
Tam sim no siv los ntawm 2000KVA transformers yog txo los ntawm 2500A mus rau 2120A, poob ntawm 15%;tam sim no siv los ntawm 630KVA transformers yog txo los ntawm 770A mus rau 620A, poob ntawm 19%.Tom qab them nyiaj, thepowerlossreductionvalueisWT = △Pd*(S1/S2)2*τ*[1-(cosφ1/cosφ2)2]=50×{(0.85×4500)/4500}2×0.4≈34(kw h) formula, Pd yog luv luv-circuit poob ntawm transformer, uas yog 50KW, thiab txhua xyoo kev txuag ntawm cov nqi hluav taws xob yog 34 * 20 * 30 * 10 * 0.7 = 142,800 yuan (raws li kev ua haujlwm 20 teev ib hnub, 30 hnub hauv ib hlis. , 10 lub hlis ib xyoos, 0.7 yuan ib kWh).
fais fab xwm txheej xwm txheej
Lub tuam txhab tag nrho cov hluav taws xob engineering Performance index tau nce ntawm 0.8 mus rau 0.95, thiab lub hli fais fab engineering Performance index tseem nyob ntawm 0.96-0.98, nce los ntawm ntau tshaj 20,000 yuan ib hlis mus rau ntau tshaj 6,000-10,000 yuan ib hlis.
Qhov tsawg-voltage reactive fais fab nyiaj them ntawm lub zaus hloov pauv lim muaj peev xwm tswj tau cov mem tes tam sim no thiab them rov qab cov khoom siv hluav taws xob, daws qhov teeb meem ntawm lub zog hluav taws xob, ua kom cov zis muaj peev xwm ntawm lub tshuab hloov pauv, txo qhov poob ntawm lub zog hluav taws xob, nce cov khoom tsim tawm, thiab coj cov txiaj ntsig rau lub tuam txhab Cov txiaj ntsig kev lag luam pom tseeb tau tsim tawm, thiab cov neeg siv khoom qhov kev nqis peev yog tsawg tshaj li ib xyoos qhov tau txais ntawm qhov project peev.Yog li ntawd, lub tuam txhab txaus siab heev nrog lub reactive fais fab nyiaj them ntawm lub inverter lim, thiab yuav qhia ib co neeg muas zaub nyob rau hauv lub neej yav tom ntej.
Post lub sij hawm: Apr-13-2023