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 cov txheej txheem ntawm 2-tuj nruab nrab zaus induction rauv, uas yog siv los ntawm 2000 kVA (10KV / 0.75 kVA) kev tshaj lij transformer fais fab mov system.Nruab nrog 2 capacitance them nyiaj txee nrog ntim ntawm 600 kVA, 1-tuj nruab nrab zaus induction rauv, 800 kVA (10KV / 0.4KV) kev hloov pauv kev txawj thiab kev tshaj lij, thiab lub peev xwm them nyiaj txee nrog ntim ntawm 300 kVA.Daim duab ntawm lub hwj chim mov system yog raws li nram no:
Cov ntaub ntawv ua haujlwm tiag tiag
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
Lub ntsiab load ntawm nruab nrab zaus hluav taws xob rauv rectifier fais fab mov yog 6-pulse rectification.Cov khoom siv rectifier hloov AC rau hauv DC thaum tsim kom muaj ntau qhov sib haum xeeb.Cov kev sib raug zoo ntawm cov khoom sib haum xeeb tam sim no raug txhaj rau hauv daim phiaj, thiab cov impedance ntawm daim phiaj tsim kom muaj kev sib haum xeeb, ua rau daim phiaj hluav taws xob tam sim no cuam tshuam rau qhov zoo ntawm cov khoom siv hluav taws xob thiab kev ua haujlwm kev nyab xeeb, ua rau cov kab poob thiab qhov hluav taws xob offset, thiab ua kom muaj zog.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, ntau harmonics yog nkag mus rau hauv lub capacitor bank, thiab tus nqi ntawm cov capacitive tam sim no qhov 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
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 kev ua haujlwm ntawm 0.75KV thiab 0.4KV systems, 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 muaj zog tshaj 0.95.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 ua haujlwm"
Kev txwv ntawm kev sib haum xeeb tam sim no tawm los ntawm cov khoom siv hluav taws xob tsawg thiab cov khoom siv hluav taws xob GB / T 17625.7-1998 Cov ntsiab lus Electrotechnical Fais fab capacitors 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, thaum tsim cov lim dej tsis zoo ntawm lub tshuab hluav taws xob zaus, nws yuav tsum tau ua kom ntseeg tau tias cov khoom siv lim dej ua haujlwm tau them nyiaj rau lub zog tsis muaj zog los ntawm kev ua kom muaj kev sib haum xeeb ntawm ntau zaus tshaj 250HZ thiab 350HZ, thiab ua kom lub zog muaj zog.
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:
Post lub sij hawm: Apr-14-2023