Cov ntaub ntawv tseem ceeb ntawm cov neeg siv
Lub tuam txhab lub rooj vag valve feem ntau tsim cov khoom siv valve.Lub tuam txhab cov khoom siv ntau lawm suav nrog ib-tuj nruab nrab-ntau zaus induction rauv, uas siv 2000 kVA (10KV / 0.75 kVA) kev tshaj lij kev hloov hluav taws xob hluav taws xob, thiab tau nruab nrog ob lub capacitor them nyiaj txee nrog ntim ntawm 600 kVA, a ib-tuj nruab nrab-ntau zaus induction rauv, 800 kVA (10KV / 0.4 kVA) kev tshaj lij kev hloov hluav taws xob hluav taws xob, lub capacitor them nyiaj txee nrog ntim ntawm 300 kVA.Daim duab ntawm lub hwj chim mov system yog raws li nram no:
Lub zog pom tseeb ntawm qhov nruab nrab zaus induction rauv nruab nrog 2000KVA transformer yog 700KVA-2100KVA, lub zog nquag yog P = 280KW-1930KW, reactive load yog Q = 687KAR-830KAR, lub zog tshaj yog PF = 0,4-0. Tam sim no hauv kev ua haujlwmⅰ = 538 A-1660 A, lub zog pom tseeb ntawm qhov nruab nrab zaus induction rauv nruab nrog 800KVA transformer yog 200KVA-836KVA.Lub zog hluav taws xob yog P = 60KW-750KW, qhov reactive load yog Q = 190KAR-360KAR, lub zog qhov tseem ceeb yog PF = 0.3-0.9, thiab tam sim no ua hauj lwm i = 288 A-1200 A. Vim hais tias lub capacitor them nyiaj txee tsis tuaj yeem muab tso rau. rau hauv kev ua haujlwm (tsis siv neeg them nyiaj poob haujlwm, thaum lub capacitor yog manually muab tso rau hauv kev siv, lub capacitor nrov yog txawv txav, lub Circuit Court breaker mus ncig teb chaws, lub capacitor yog ntim, roj leaked, tawg, thiab siv tsis tau), lub hli lub hwj chim PF = 0.78, thiab cov paj laum txhua hli tau hloov kho ntau dua 32,000 yuan.
Power System Situation Analysis
Qhov tseem ceeb ntawm cov khoom siv hluav taws xob rectified rau nruab nrab zaus induction rauv yog rau ib leeg mem tes ballasts.Cov khoom siv rectifier tsim ntau yam kev sib haum xeeb thaum nws hloov AC tam sim no rau DC, uas yog ib qho ntawm cov khoom sib haum xeeb.Kev sib haum xeeb tam sim no nkag mus rau hauv daim phiaj hluav taws xob yuav ua rau muaj kev sib haum xeeb ua haujlwm ntawm cov yam ntxwv impedance ntawm daim phiaj hluav taws xob, ua rau lub zog poob ntawm kev ua haujlwm voltage thiab tam sim no ntawm daim phiaj hluav taws xob, ua rau muaj kev phom sij rau kev ua haujlwm zoo thiab kev nyab xeeb ntawm lub zog hluav taws xob, nce ntxiv. cov kab poob thiab kev ua haujlwm voltage sib txawv, thiab ua rau kev puas tsuaj rau daim phiaj hluav taws xob thiab kev ua haujlwm Lub Hoobkas cov khoom siv hluav taws xob yuav ua rau muaj kev phom sij.Thaum lub reactive fais fab nyiaj them nyiaj capacitor bank yog muab tso rau hauv lub lag luam, vim hais tias cov harmonic yam ntxwv impedance ntawm lub capacitor bank yog me me, ib tug loj tus naj npawb ntawm harmonics yog nkag mus rau hauv lub capacitor bank, thiab lub capacitance tam sim no nce sai heev, cuam tshuam nws lub neej kev pab cuam.Ntawm qhov tod tes, thaum lub harmonic capacitive reactance ntawm lub txhab nyiaj capacitor yog sib npaug rau qhov sib npaug ntawm qhov sib npaug ntawm qhov sib npaug ntawm qhov system thiab cov resonance tshwm sim, qhov kev sib haum xeeb tam sim no loj heev (2-10 zaug), ua rau overheating thiab puas. lub capacitor.Tsis tas li ntawd, cov kev sib haum xeeb yuav ua rau DC sinusoidal nthwv dej hloov pauv, ua rau cov sawtooth ncov nthwv dej, uas yog ib qho yooj yim los ua ib feem ntawm cov khoom siv insulating.Lub sij hawm ntev ib nrab tso tawm kuj tseem yuav ua rau kev laus ntawm cov khoom siv insulating thiab yooj yim ua rau capacitor puas.Yog li ntawd, lub capacitor reactive fais fab nyiaj them txee tsis tuaj yeem siv rau kev them nyiaj ntawm qhov nruab nrab zaus induction rauv, thiab lub tshuab lim reactive fais fab nyiaj them nrog cov mem tes tam sim no kev ua haujlwm yuav tsum raug xaiv.
Reactive fais fab kev them nyiaj txoj kev kho mob
Cov hom phiaj kev tswj hwm
Cov khoom siv lim dej tau tsim los ua kom tau raws li cov kev cai tswj hwm rau kev tawm tsam ntawm kev sib haum xeeb thiab lub zog reactive.
Hauv kev ua haujlwm ntawm 0.75KV thiab 0.4KV systems, tom qab cov khoom siv lim dej tawm ntawm lub Hoobkas, qhov kev txiav txim siab siab tau raug tshem tawm ntawm lub hli nruab nrab lub zog ntawm 0.95 lossis ntau dua.
Cov tswv yim ntawm lub lim them nyiaj voj yuav tsis ua rau cov mem tes tam sim no resonance lossis resonance overvoltage thiab overcurrent.
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 kev ua haujlwm;JB/T9663-1999 "Low-voltage reactive fais fab tsis siv neeg them nyiaj tswj" Harmonic tam sim no txwv tus nqi ntawm cov khoom siv hluav taws xob tsawg thiab hluav taws xob;GB/T 17625.7-1998
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, peb lub tuam txhab tau tsim cov txheej txheem ntawm cov ncauj lus kom ntxaws intermediate zaus induction rauv reactive fais fab nyiaj them nqi lim tswv yim.Ua tib zoo xav txog cov khoom siv hluav taws xob thiab kev sib haum xeeb, thiab teeb tsa cov khoom siv hluav taws xob tsawg-voltage reactive fais fab cov ntxaij lim dej nyob rau hauv qab voltage sab ntawm lub tuam txhab 0.75KV thiab 0.4KV transformers rau suppress harmonics, compensate reactive zog, thiab txhim kho lub hwj chim yam.Thaum lub sij hawm ua hauj lwm ntawm lub nruab nrab zaus rauv, lub rectifier ntaus ntawv generates 6K + 1 harmonics, thiab Fourier series yog siv los decompose thiab hloov tam sim no los tsim 5 harmonics ntawm 250HZ thiab 7 harmonics saum 350HZ.Yog li ntawd, nyob rau hauv kev tsim ntawm nruab nrab zaus induction rauv lim reactive zog them, zaus ntawm 250HZ, 350HZ thiab nyob ib ncig ntawm yuav tsum tau tsim los xyuas kom meej tias lub lim them nyiaj voj yuav tsim nyog suppress lub mem tes tam sim no thaum compensating lub reactive load thiab kev txhim kho lub hwj chim.
txoj haujlwm tsim
Lub zog muaj peev xwm ntawm 2-tuj nruab nrab zaus induction rauv sib tw nrog 2000 kVA transformer yog them los ntawm 0.78 txog 0.95.Cov cuab yeej lim dej yuav tsum tau nruab nrog lub peev xwm ntawm 820 kVA, thiab hloov pauv mus rau 6 pawg ntawm lub peev xwm, txhua qhov sib tw rau winding nyob rau hauv qab voltage sab ntawm lub transformer rau them nyiaj.Qib kev hloov kho qhov muaj peev xwm yog 60KVAR, uas tuaj yeem ua tau raws li ntau lub zog xav tau ntawm qhov nruab nrab zaus induction rauv.Lub zog loj ntawm 1 tuj nruab nrab zaus induction rauv sib tw nrog 800 kVA transformer yog them los ntawm 0.78 txog 0.95.Cov khoom siv lim dej yuav tsum tau nruab nrog lub peev xwm ntawm 360 kVA, uas tuaj yeem hloov pauv mus rau 6 pawg ntawm lub peev xwm, thiab qhov kev hloov kho qib siab yog 50 kVA, uas tuaj yeem ua tau raws li ntau yam kev xav tau ntawm lub tshuab hluav taws xob nruab nrab ntawm qhov hluav taws xob induction.Hom kev tsim no tau lees paub tias qhov hloov kho lub zog yog siab dua 0.95.
Kev tsom xam cov nyhuv tom qab kev teeb tsa ntawm cov nyiaj lim dej
Thaum pib ntawm Lub Rau Hli 2010, lub tshuab hluav taws xob nruab nrab ntawm lub tshuab hluav taws xob lim reactive fais fab nyiaj them nyiaj tau teeb tsa thiab muab tso rau hauv kev ua haujlwm.Cov cuab yeej cia li taug qab qhov hloov pauv ntawm qhov nruab nrab zaus induction rauv, tshwj xeeb tshaj yog them nyiaj rov qab, thiab txhim kho lub zog.cov ntsiab lus raws li hauv qab no:
Tom qab lub tshuab lim dej tau hloov pauv, lub zog hloov pauv nkhaus yog li 0.97 (lub zog ntawm lub tshuab lim dej raug txiav tawm yog li 0.8).
Kev ua haujlwm thauj khoom
Tam sim no ntawm 2000KVA transformer yog txo los ntawm 1530A mus rau 1210A, txo qis ntawm 21%;Tam sim no ntawm 800KVA transformer yog txo los ntawm 1140A mus rau 920A, qhov txo qis ntawm 19.3%, uas yog sib npaug li 20% txo ntawm transformer, uas yog, 560KVA, thiab cov zis hluav taws xob puas tsuaj tom qab them nyiaj raug txo los ntawm 21%.;Transformer puas raug txo los ntawm WT =?Pd1S2) 2**[1-(1-1/cos2)2]=24{(0.78?2800)/280}20.415(kwh).Lub transformer poob yog 24 yuan, thiab lub hli poob yog 15KW = 150d;tus nqi txuag txhua hli yog 1580d = 230d * 30d(2307){0.782800}20d.
fais fab xwm txheej xwm txheej
Lub hlis no, lub tuam txhab lub zog muaj zog tau nce los ntawm 0.78 mus rau 0.97, tus nqi txhua hli thiab cov nqi hluav taws xob tau hloov kho rau 0, thiab lub txim raug hloov mus rau 4,680 yuan.Txij thaum ntawd los, lub hli fais fab tseem nyob ntawm 0.97-0.98, thiab cov nqi zog txhua hli tau nyob nruab nrab ntawm 3,000-5,000 yuan.
Feem ntau, cov khoom no muaj peev xwm zoo heev los txo cov mem tes tam sim no thiab them rov qab lub zog reactive, daws lub tuam txhab qhov teeb meem mus sij hawm ntev ntawm kev coj tus nqi paj thiab nqi them nqi hluav taws xob, txhim kho lub peev xwm ntawm transformers, thiab coj cov txiaj ntsig kev lag luam rau lub tuam txhab, Rov qab los. tus neeg siv khoom peev hauv tsawg dua ib xyoos.Yog li ntawd, lub reactive fais fab nyiaj them ntawm lub nruab nrab zaus rauv ua los ntawm lub tuam txhab yog heev txaus siab, thiab yuav nyiam ntau cov neeg muas zaub nyob rau hauv lub neej yav tom ntej.
Post lub sij hawm: Apr-14-2023