Cov ntaub ntawv tseem ceeb ntawm cov neeg siv
Lub tuam txhab dov steel feem ntau tsim cov kub dov puag ncig steel nrog qhov tshwj xeeb ntawm 16mm ~ φ150mm.Lub zog ntawm lub tuam txhab cov kab ntau lawm yog tsav los ntawm DC lub cev muaj zog thiab nruab nrog ob lub 3150KVA transformers.Daim duab ntawm lub hwj chim mov system yog raws li nram no:
Cov ntaub ntawv ua haujlwm tiag tiag
Lub zog nruab nrab ntawm 3150KVA DC brushless lub cev muaj zog yog PF = 0.75, ua haujlwm tam sim no yog 2650A, lub ntsiab mem tes tam sim no yog 5 zaug, 7 zaug, thiab qhov hloov pauv tam sim no yog 19.5%.
Fais fab System 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.
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 kev them nyiaj cov kev mob JB/T9663-1999 "Low-voltage reactive hwj chim tsis siv neeg them nyiaj controller" High-order harmonic tam sim no txwv tus nqi los ntawm tsawg-voltage hwj chim thiab hluav taws xob khoom 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 lim reactive zog them yuav tsum tau tsim rau 250Hz, 350Hz thiab lwm zaus kom paub meej tias lub lim them nyiaj Circuit Court muaj peev xwm lim tawm cov mem tes tam sim no cov zis hluav taws xob, txhim kho lub zog, thiab ua kom lub zog pulse tam sim no ua raws li GB / T3. .
txoj haujlwm tsim
Lub zog loj ntawm 3150KVA transformer yog them los ntawm 0.72 txog 0.95.Cov khoom siv lim dej yuav tsum tau nruab nrog 2100KVar, thiab muab faib ua 6 pawg tswj kev hloov pauv kom them nyiaj rau hauv qab siab sab winding ntawm lub transformer, thiab kho qhov ntim rau 95KVAR, coj mus rau hauv tus account qhov tso zis hluav taws xob xav tau ntawm cov kab ntau lawm.
Kev tsom xam cov nyhuv tom qab kev teeb tsa ntawm cov nyiaj lim dej
Nyob rau lub Plaub Hlis 2011, DC lub cev muaj zog lim reactive zog them nyiaj ntaus ntawv raug ntsia thiab muab tso rau hauv kev ua haujlwm.Cov cuab yeej cia li taug qab cov kev hloov pauv ntawm DC lub cev muaj zog, thiab ua tau lim tawm cov kev txiav txim siab siab kom them rov qab lub zog thiab txhim kho lub zog.cov ntsiab lus raws li hauv qab no:
Harmonic spectrum faib daim duab
Load Waveform
Tom qab cov cuab yeej lim dej tau muab tso rau hauv kev siv, lub zog hloov pauv nkhaus yog li 0.98 (qhov tsa ceg yog kwv yees li 0.7 thaum lub tshuab lim nyiaj raug tshem tawm)
Kev ua haujlwm thauj khoom
Lub hwj chim ntawm 3150KVA transformer yog siab dua 0.95, lub 5th harmonic yog txo los ntawm 510A mus rau 102A, lub 7th harmonic yog txo los ntawm 300A mus rau 60A, thiab tam sim no siv yog txo los ntawm 2650A mus rau 2050A, poob ntawm 23%.Tom qab them nyiaj, tus nqi poob qis yog WT = △Pd * (S1 / S2) 2 * τ * [1-(cosφ1 / cosφ2) 2] = 35 × {(0.72 × 3150) / 3150}2 × 0.66≈33 (kw h) Nyob rau hauv cov mis, Pd yog luv luv-circuit poob ntawm transformer, uas yog 35KW, thiab txhua xyoo kev txuag ntawm cov nqi hluav taws xob yog 33 * 20 * 30 * 10 * 0.7 * 2 = 280,000 yuan (raws li kev ua haujlwm 20 teev ib hnub, 30 hnub hauv ib hlis, thiab 10 lub hlis hauv ib xyoos, 0.7 yuan ib kilowatt-teev hluav taws xob);vim qhov txo qis ntawm kev sib haum xeeb, cov nqi hluav taws xob tau txais kev cawmdim: Kev poob ntawm lub transformer los ntawm cov harmonic tam sim no feem ntau yog ua kom cov ferromagnetic poob thiab tooj liab poob.Qhov poob ferromagnetic cuam tshuam nrog lub zog thib peb ntawm cov zaus tam sim no.Engineering Feem ntau, 2% ~ 5% yog noj.Rau rectification load, 2% yog noj, uas yog, WS = 4300 * 6000 * 0.7 * 0.03≈360,000 yuan, uas yog, txhua xyoo txuag ntawm cov nqi hluav taws xob yog 28 + 36 = 64 (10,000 yuan).
fais fab xwm txheej xwm txheej
Lub tuam txhab cov cai tag nrho tau nce los ntawm 0.72 mus rau ib ncig ntawm 0.95, cov cai txhua hli tseem nyob ntawm 0.96-0.98, thiab cov nyiaj them txhua hli tau nce los ntawm ntau dua 100,000 yuan mus rau 15,000 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 lub cev muaj zog lim, thiab yuav qhia qee cov neeg siv khoom yav tom ntej.
Post lub sij hawm: Apr-14-2023