Cov ntaub ntawv tseem ceeb ntawm cov neeg siv
Lub tuam txhab khoom lag luam yas feem ntau tsim sab hauv tsev thiab sab nraum zoov tshaj tawm lub teeb lub thawv ntaub, tshuaj tsuag daim ntaub, thiab PVC dov zaj duab xis khoom.Lub tuam txhab cov cuab yeej tsim khoom muaj plaub qhov dav-dav PVC dov zaj duab xis ntau lawm kab, nrog rau cov tshuaj tsuag txheej ntau lawm kab thiab ob daim duab consumables ntau lawm kab, Lub hwj chim ib feem adopts zaus conversion tsav lub cev muaj zog thiab DC lub cev muaj zog, 1000KVA teeb, 2 teeb ntawm 1250KVA transformers, 2 teeb ntawm 800KVA transformers, 1 teeb ntawm 630KVA transformers, thiab lub peev xwm them nyiaj phaj yog teem rau ntawm qhov tsis tshua muaj hluav taws xob sab ntawm lub transformer.Daim duab ntawm lub hwj chim mov system yog raws li nram no:
Cov ntaub ntawv ua haujlwm tiag tiag
Lub 2000KVA transformer nruab nrog lub nruab nrab zaus rauv thiab inverter muaj lub zog siab tshaj plaws ntawm 1500KVA, qhov tseeb lub zog yog PF = 0.82, kev ua haujlwm tam sim no yog 2250A, cov kev sib haum xeeb feem ntau yog 5th thiab 7th, thiab tag nrho tam sim no distortion tus nqi yog 23.6%. .
Power System Situation Analysis
Lub ntsiab load ntawm nruab nrab zaus induction rauv, nruab nrab zaus induction rauv thiab inverter rectifier fais fab mov yog 6th pulse rectifier.Cov khoom siv rectifier tsim cov mem tes tam sim no ntau thaum hloov AC tam sim no rau hauv AC voltage.Lub harmonic tam sim no nkag mus rau hauv daim phiaj hluav taws xob tuaj yeem ua rau cov mem tes tam sim no ua haujlwm voltage, ua rau muaj kev hloov pauv ntawm kev khiav hauj lwm voltage thiab tam sim no, ua rau muaj kev phom sij rau qhov zoo thiab kev nyab xeeb ntawm kev hloov cov khoom siv hluav taws xob, nce kab poob thiab kev khiav hauj lwm voltage sib txawv, thiab cuam tshuam tsis zoo rau daim phiaj hluav taws xob thiab cov khoom siv hluav taws xob ntawm lub tshuab fais fab nws tus kheej.
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.
Yog li ntawd, qhov tsawg-voltage reactive fais fab nyiaj them ntawm lub lim nrog kev ua haujlwm ntawm mem tes tam sim no lim yuav tsum tau siv los them cov nqi reactive load thiab txhim kho lub 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 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, lub tuam txhab tau tsim cov txheej txheem ntawm cov ncauj lus kom ntxaws reactive fais fab nyiaj them rau qhov nruab nrab zaus induction rauv thiab lub zog inverter.Xav txog cov khoom siv hluav taws xob thauj khoom thiab cov lim dej tam sim no, Ib txheej lim dej qis-voltage reactive fais fab nyiaj them, lim cov mem tes tam sim no, them rov qab cov khoom siv hluav taws xob, thiab txhim kho lub zog.
Nyob rau hauv tag nrho cov txheej txheem ntawm nruab nrab zaus induction rauv thiab lub converter, tag nrho cov khoom tsim 6K mem tes tam sim no, uas tau hloov dua siab tshiab raws li tam sim no ntws ntawm Fourier series, thiab cov yam ntxwv mem tes tam sim no generated ntawm 5250Hz thiab 7350Hz.Yog li ntawd, thaum tsim cov lim reactive fais fab nyiaj them, lub soft starter thiab 350Hz zaus tsim tswv yim xyuas kom meej tias lub lim them fais fab mov Circuit Court yog tsim nyog thiab cov lim mem tes tam sim no tso zis fais fab nyiaj them yog zoo dua los txhim kho lub hwj chim yam kom lub system software pulse tam sim no. nyob rau hauv kab nrog GB / T3 unanimous.
txoj haujlwm tsim
Txhua txheej ntawm 2000KVA transformer sib raug rau qhov nruab nrab zaus rauv thiab lub zog loj ntawm lub inverter yog them los ntawm 0.8 mus rau saum toj 0.95, lub 5th harmonic yog txo los ntawm 420A mus rau 86A, thiab 7th harmonic yog txo los ntawm 230A.Cov cuab yeej lim dej yuav tsum tau nruab nrog lub peev xwm ntawm 1060KVar.Muab faib ua 6 pawg muaj peev xwm rau kev hloov pauv tsis siv neeg, sib haum rau qhov nruab nrab zaus rauv, inverter rectifier fais fab mov lim nyiaj them nyiaj, muab faib ua 5 zaug, 7 zaug thiab nplua nyiaj lim kev them nyiaj txoj kev tsis siv neeg hloov, kom tau raws li qhov nruab nrab zaus rauv, inverter lim thiab reactive zog Compensation tsim cov cai.
Qhov kev tsim qauv no ua kom ntseeg tau tias kev tswj hwm kev sib haum xeeb ua raws li lub teb chaws tus qauv GB / T 14549-93, thiab kho lub zog ntawm lub tshuab hluav taws xob nruab nrab thiab zaus hloov pauv siab tshaj 0.95.Raws li pom nyob rau hauv daim duab hauv qab no: Cov nyhuv tsom tom qab kev teeb tsa ntawm cov nyiaj lim dej
Nyob rau lub Rau Hli 2010, lub tshuab hluav taws xob nruab nrab zaus thiab zaus hloov pauv lim cov khoom siv hluav taws xob them nyiaj tau teeb tsa thiab muab tso rau hauv kev ua haujlwm.Cov cuab yeej cia li taug qab cov kev hloov pauv ntawm qhov nruab nrab zaus rauv thiab zaus hloov pauv, thiab tshem tawm cov kev txiav txim siab sib haum xeeb 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 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)
Load ua hauj lwm tej yam kev mob Qhov tam sim no siv los ntawm txhua txheej ntawm 2000KVA transformers yog txo los ntawm 2250A mus rau 1860A, ib tug poob ntawm 17%;Tus nqi txo ntawm lub zog poob tom qab them nyiaj yog WT = △Pd * (S1 / S2) 2 * τ * [1-(cosφ1 / cosφ2)2] = 24 × {(0.85 × 2000) / 2000}2 × 0.4≈16 (kw h) Nyob rau hauv cov qauv, Pd yog luv luv-circuit poob ntawm transformer, uas yog 24KW, thiab txhua xyoo kev txuag ntawm cov nqi hluav taws xob yog 16 * 20 * 30 * 10 * 0.7 = 67,000 (Raws li kev ua haujlwm 20 teev ib hnub twg , 30 hnub hauv ib hlis, thiab 10 lub hlis hauv ib xyoos, 0.7 yuan ib kilowatt-teev hluav taws xob);Cov nqi hluav taws xob tau txais kev cawmdim vim qhov txo qis ntawm kev sib haum xeeb: Cov kev poob los ntawm kev sib haum xeeb tam sim no rau cov transformers feem ntau yog vim muaj kev puas tsuaj ferromagnetic thiab tooj liab poob thiab ferromagnetic tsis muaj feem xyuam rau peb lub zog ntawm kev sib haum xeeb tam sim no.Feem ntau, 2% ~ 5% yog coj mus rau hauv engineering, thiab 2% yog coj mus rau rectification load, uas yog: WS = 2000 * 6000 * 0.7 * 0.02≈168,000 yuan, Qhov ntawd yog, daim nqi hluav taws xob tuaj yeem txuag tau tag nrho lub xyoo. (6.7 + 16.8) * 2 = 47 (10,000 yuan).
fais fab xwm txheej xwm txheej
Lub tuam txhab txoj cai tag nrho tau nce los ntawm 0.8 mus rau 0.95, thiab cov cai txhua hli tau khaws cia ntawm 0.96-0.98, nrog rau cov nqi zog ntxiv ntawm 6,000-10,000 yuan.
Tag nrho cov nyob rau hauv tag nrho, qhov tsawg-voltage reactive fais fab nyiaj them nyiaj ntawm lub MFF thiab VF cov ntxaij lim dej muaj cov ntxaij lim dej zoo heev thiab compensates reactive loads, daws teeb meem ntawm reactive hwj chim nplua, tsub kom lub tso zis muaj peev xwm ntawm transformers, txhim kho lub zog zoo, txhim kho cov yam ntxwv ntawm kev siv hluav taws xob. cov cuab yeej siv, thiab txo cov nyiaj siv hluav taws xob siv hluav taws xob, kev txhim kho kev ua haujlwm, cov txiaj ntsig kev lag luam tseem ceeb rau lub tuam txhab, kev nqis peev nrog tus nqi xa rov qab tsawg dua ib xyoos rau cov neeg siv khoom, thiab lwm yam. Yog li ntawd, lub tuam txhab txaus siab heev rau cov nyiaj them ntawm qhov nruab nrab zaus induction rauv. thiab lim reactive load ntawm inverter fais fab mov, thiab yuav qhia ntau tus neeg muas zaub nyob rau hauv lub neej yav tom ntej.
Post lub sij hawm: Apr-14-2023