Cov ntaub ntawv tseem ceeb ntawm cov neeg siv
Ib lub tuam txhab steel dov tsim 0.5mm tuab steel chains.Lub tuam txhab muaj 4 cov kab ntau lawm, suav nrog 1 rau 650 steel mills thiab 3 rau 450 steel tshuab.Lub zog tsav tsheb yog ib feem ntawm DC brushless motors, thiab 3 pawg ntawm 1250KVA transformers thiab 630KVA ..Daim duab ntawm lub hwj chim mov system yog raws li nram no:
Cov ntaub ntawv ua haujlwm tiag tiag
Qhov nruab nrab lub zog ntawm 1250KVA transformer yog PF = 0.62, kev ua haujlwm tam sim no ntawm 1960A thiab 630KVA transformer yog 700KVA, qhov nruab nrab lub zog yog PF = 0.62, qhov ua haujlwm tam sim no yog 1050A, tag nrho cov transformers yog rog, thiab cov mem tes tam sim no yog 5 zaug, tam sim no ntim hloov piv yog 18.5%.
Power System Situation Analysis
Lub ntsiab load ntawm DC brushless lub cev muaj zog ballast yog 6 ib leeg-pulse ballasts.Cov khoom siv ballast ua rau muaj ntau cov mem tes tam sim no hauv AC, AC, thiab DC ua haujlwm.Nws yog ib qho khoom siv pulse tam sim no.Thaum nws tau nkag mus rau hauv daim phiaj hluav taws xob, qhov kev sib haum xeeb tam sim no Cov mem tes tam sim no ua haujlwm voltage yog tshwm sim rau cov yam ntxwv impedance ntawm lub zog hluav taws xob network, uas ua rau qhov tawm ntawm qhov chaw ua haujlwm voltage thiab tam sim no, uas ua rau muaj kev phom sij rau kev ua haujlwm thiab kev nyab xeeb. ntawm cov khoom siv hluav taws xob hloov hluav taws xob, ua rau cov kab poob thiab ua haujlwm voltage sib txawv, thiab muaj kev cuam tshuam tsis zoo rau lub zog hluav taws xob thiab cov khoom siv hluav taws xob nws tus kheej.Yog li ntawd, kev them nyiaj ntawm lub brushless DC lub cev muaj zog yuav tsum siv qhov tsawg-voltage reactive fais fab nyiaj them ntawm lub pulse tam sim no suppression lim los them cov reactive load, txhim kho lub hwj chim yam, thiab yuav tsis raug nplua los ntawm reactive hwj chim los ua kom cov zis ntawm lub transformer. .
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
Cov tswv yim tsim
Raws li cov xwm txheej tshwj xeeb ntawm lub tuam txhab, ib txoj kev npaj rau reactive zog them ntawm DC brushless lub cev muaj zog lim yog tsim los txiav txim siab lub load fais fab thiab mem tes tam sim no tsub kom, thiab ib txheej ntawm lim low-voltage reactive fais fab nyiaj them yog ntsia rau hauv qab 0.4kV. voltage sab ntawm lub transformer, mus suppress lub mem tes tam sim no, thiab them nyiaj rau reactive load, thiab txhim kho lub hwj chim yam.Lub ballast generates 6K-1 mem tes tam sim no nyob rau hauv tus txheej txheem ntawm brushless DC lub cev muaj zog, thiab siv cascaded tam sim no yaj tam sim no, thiab cov yaj tam sim no yog hais txog 5250Hz thiab 7350Hz.Yog li ntawd, lub reactive fais fab kev them nqi tsim ntawm lub intermediate zaus induction rauv lim yuav tsum coj 250Hz, 350Hz thiab zaus tsim raws li lub hom phiaj, thiaj li yuav xyuas kom meej tias cov nyiaj them ceg ntawm lub lim yuav zoo suppress lub mem tes tam sim no cov nyiaj them, thiab tib yam. lub sij hawm suppress lub reactive load thiab txhim kho lub hwj chim Factor.
txoj haujlwm tsim
Lub zog loj tshaj plaws ntawm 12500KVA DC brushless lub cev muaj zog ntau lawm kab yog them los ntawm 0.62 txog 0.95.Cov khoom siv lim dej yuav tsum tau nruab nrog lub ntim ntawm 1100KVar, uas tau muab faib ua 10 pawg ntawm kev hloov pauv tsis siv neeg los them nyiaj rau winding nyob rau hauv qab voltage sab ntawm lub transformer.Lub 45KVAR maj mam kho lub ntim kom tau raws li qhov tso zis hluav taws xob xav tau ntawm cov kab ntau lawm.Lub 630KVA transformer DC brushless lub cev muaj zog ntau lawm kab Cov khoom siv hluav taws xob zoo yog them los ntawm 0.62 txog 0.95.Cov khoom siv lim dej yuav tsum tau nruab nrog lub ntim ntawm 600KVar, thiab txiav tawm qhov qis-sab winding ntawm lub transformer, thiab nws maj mam hloov ntim ntawm 45KVAR, coj mus rau hauv tus account qhov yuav tsum tau voltage ntawm cov kab ntau lawm.
Kev tsom xam cov nyhuv tom qab kev teeb tsa ntawm cov nyiaj lim dej
Thaum lub Plaub Hlis 2010, DC lub cev muaj zog filtering reactive fais fab nyiaj them nyiaj ntaus ntawv tau teeb tsa thiab muab tso rau hauv kev ua haujlwm.Cov cuab yeej cia li taug qab cov kev hloov pauv ntawm DC motors thiab zaus converters, suppresses high-order harmonics nyob rau hauv lub sij hawm, compensates reactive zog, thiab txhim kho lub hwj chim.cov ntsiab lus raws li hauv qab no:
Tom qab cov khoom siv lim dej tau muab tso rau hauv kev siv, lub zog hloov pauv nkhaus yog li 0.99 (qhov tsa qhov siab yog li 0.6 thaum lub tshuab lim nyiaj raug tshem tawm)
Kev ua haujlwm thauj khoom
Tam sim no siv los ntawm 1250KVA transformer yog txo los ntawm 1960A mus rau 1210A, poob ntawm 38%.Tam sim no siv los ntawm 1630KVA transformer yog txo los ntawm 1050A mus rau 657A, poob ntawm 37.5%.Tom qab them nyiaj, tus nqi poob qis yog WT = △Pd * (S1 / S2) 2 * τ * [1-(cosφ1/cosφ2)2] = 32 × {(0.62 × 3000) 3000}2 × 0.4≈15.8( kw· h) Nyob rau hauv cov mis, Pd yog luv luv-circuit poob ntawm transformer, uas yog 32KW, thiab txhua xyoo kev txuag ntawm cov nqi hluav taws xob yog 15.8 * 10 * 30 * 10 * 0.7 = 33,000 yuan (raws li kev ua hauj lwm 20 teev a hnub, 10 hnub hauv ib hlis, thiab 10 lub hlis ib xyoos, ib kw hluav taws xob 0.7 yuan).
fais fab xwm txheej xwm txheej
Lub tuam txhab txoj cai tag nrho tau nce los ntawm 0.7 mus rau 0.95, cov cai txhua hli tseem nyob ntawm 0.96-0.98, thiab cov nyiaj hli txhua hli yog 3,000-4,000 yuan.
DC lub cev muaj zog lim qis-voltage reactive fais fab nyiaj them muaj peev xwm los txo cov mem tes tam sim no thiab them rov qab lub zog hluav taws xob, daws qhov teeb meem ntawm lub hwj chim reactive txim, ua kom cov zis muaj peev xwm ntawm transformer, txo qhov poob ntawm lub zog them nyiaj, nce cov zis, thiab muab Lub tuam txhab tau tsim cov txiaj ntsig kev lag luam tseem ceeb, thiab cov neeg siv khoom tau txais qhov project peev tsawg dua ib xyoos.Yog li ntawd, lub tuam txhab txaus siab heev nrog lub zog reactive them nyiaj ntawm brushless DC motors thiab inverter lim, thiab yuav ua kom paub qee cov neeg siv khoom yav tom ntej.
Post lub sij hawm: Apr-14-2023