Cov ntaub ntawv tseem ceeb ntawm cov neeg siv
Lub tuam txhab tseem ceeb ntawm lub tuam txhab kho vajtse thiab cov khoom siv hauv tsev muaj kev nyab xeeb tsim PC puag ncig steel, phaj kawg, kab galvanized, hloov cov khoom siv, 30MnSi thiab lwm yam khoom siv.Lub tuam txhab muaj 4 cov kab ntau lawm, uas siv cov cua kub nruab nrab thiab DC hloov pauv zaus tsav lub cev muaj zog, nrog 2000KVA2 (tsim nyob rau hauv tandem).Daim duab ntawm lub hwj chim mov system yog raws li nram no:
Cov ntaub ntawv ua haujlwm tiag tiag
Lub zog tshwj xeeb yog PF = 0.82, tam sim no ua haujlwm yog 2250A, lub ntsiab mem tes tam sim no yog 5 zaug, thiab tag nrho tam sim no dhau los ua 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 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, 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
Lub tshuab hluav taws xob muag muag thiab lub tshuab hluav taws xob muag muag ntawm txhua pab pawg ntawm 2000KVA transformers raug them los ntawm 0.8 mus rau 0.95, 5th pulse tam sim no raug txo los ntawm 420A txog 86A, 7th pulse tam sim no raug txo los ntawm 230A txog 46A, thiab cov khoom siv lim dej yuav tsum tau ua. tau nruab nrog lub ntim ntawm 1060KVar.Cov lim tau muab faib ua 6 pawg, cov nyiaj lim dej yog siv rau cov pib muag muag thiab cov khoom siv hluav taws xob hloov hluav taws xob, cov lim tau muab faib ua 5 zaug, 7 zaug, thiab cov lim nyiaj them nyiaj hluav taws xob tau hloov dua siab tshiab los xav txog qhov nruab nrab zaus induction rauv. , lim thiab reactive zog Compensation tsim qauv kev 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 qhia hauv qab no:
Kev tsom xam cov nyhuv 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)
Kev ua haujlwm thauj khoom
Tam sim no siv los ntawm txhua txheej ntawm 2000KVA transformers yog txo los ntawm 2250A mus rau 1860A, poob ntawm 17%;Tom qab them nyiaj, tus nqi poob qis 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 mis, Pd yog luv luv-circuit poob ntawm transformer, uas yog 24KW, thiab txhua xyoo kev txuag ntawm hluav taws xob cov nqi yog 16 * 20 * 30 * 10 * 0.7 = 67,000 yuan (raws li kev ua hauj lwm 20 teev a hnub, 30 hnub ib hlis, 10 lub hlis ib xyoos, 0.7 yuan ib kilowatt-teev);Cov nqi hluav taws xob tau txais kev cawmdim vim kev txo qis kev sib raug zoo: Kev poob los ntawm kev sib haum xeeb tam sim no rau lub transformer feem ntau yog ua kom ferromagnetic poob thiab tooj liab poob, ferromagnetic poob yog cuam tshuam nrog lub zog thib peb ntawm cov zaus tam sim no.Feem ntau, 2% ~ 5% yog coj mus rau hauv engineering, thiab 2% yog coj mus rau rectified loads, uas yog: WS = 2000 * 6000 * 0.7 * 0.02≈168,000 yuan, uas yog, txhua xyoo Txuag hluav taws xob (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