Cov ntaub ntawv tseem ceeb ntawm cov neeg siv
Ib tsob nroj petrochemical feem ntau tsim cov khoom siv roj.Cov khoom siv hluav taws xob siv los ntawm lub tuam txhab yog cov khoom siv hluav taws xob muag muag, thiab cov khoom siv hluav taws xob yog 2500 kVA.Daim duab ntawm lub hwj chim mov system yog raws li nram no:
Cov ntaub ntawv ua haujlwm tiag tiag
Tag nrho lub zog ntawm lub zaus hloov pauv ntawm 2500KVA transformer yog 1860KVA, qhov nruab nrab lub zog yog PF = 0.8, thiab tam sim no ua haujlwm yog 2400-2700A.
Power System Situation Analysis
Tus yuam sij rau lub inverter fais fab mov yog lub load ntawm lub rectifier inverter fais fab mov tsav tsheb, uas belongs rau lub discrete system load.Cov cuab yeej tsim muaj ntau yam kev sib haum xeeb thaum lub sijhawm ua haujlwm, uas yog ib qho kev 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 muaj kev hloov pauv hauv 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 cov khoom siv hluav taws xob, ua rau cov khoom siv hluav taws xob ntau ntxiv. kab poob thiab ua haujlwm voltage yuam kev, thiab ua rau muaj kev puas tsuaj loj rau daim phiaj hluav taws xob thiab cov chaw ua haujlwm.Nws tus kheej cov khoom siv hluav taws xob, tshwj xeeb tshaj yog cov khoom siv hluav taws xob siv hluav taws xob yuav ua rau muaj kev cuam tshuam tsis zoo, thiab nws yooj yim ua rau muaj kev sib haum xeeb, ua rau muaj kev puas tsuaj rau cov khoom siv hluav taws xob xws li cov khoom siv capacitor.Yog li ntawd, qhov tsawg-voltage reactive fais fab nyiaj lim dej nrog kev sib haum xeeb kev ua haujlwm yuav tsum raug xaiv los ua kom muaj kev sib haum xeeb ntawm lub cev, them nyiaj rov qab ua haujlwm, thiab txhim kho lub zog.
Lim reactive zog them nyiaj kho mob txoj kev npaj
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.
Nyob rau hauv 0.4KV system ua haujlwm hom, tom qab cov khoom siv lim dej tawm ntawm lub Hoobkas, qhov kev sib haum xeeb yog siab dua 0.92 ntawm qhov nruab nrab lub hli fais fab.
Tsis txhob ua kom muaj kev sib haum xeeb resonance lossis resonance overvoltage thiab overcurrent vim input lim nyiaj ceg.
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 txheej txheem 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
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 zog them nyiaj
Tus tswj kev txiav txim technical condition DL/T597-1996
Tsawg-voltage hluav taws xob tiv thaiv qib GB5013.1-1997
Tsawg-voltage switchgear thiab controlgear sib dhos
Cov tswv yim tsim
Raws li qhov teeb meem tiag tiag ntawm kev lag luam, peb lub tuam txhab tau txiav txim siab txog cov khoom siv hluav taws xob thiab kev sib haum xeeb hauv kev lim dej tsis raug ntawm lub inverter, thiab teeb tsa lub lim dej tsis raug them nyiaj rau ntawm 0.4KV low-voltage sab ntawm lub lag luam transformer, uas. suppresses cov harmonics thiab them nyiaj rau qhov nce ntawm reactive zog.fais fab xwm txheej.
Thaum lub sijhawm ua haujlwm ntawm qhov hloov pauv zaus, nws yuav tsim 5 zaug ntawm 250HZ, 7 zaug ntawm 350HZ thiab lwm yam kev txiav txim siab zoo.Yog li ntawd, thaum tsim cov lim dej tsis zoo ntawm lub inverter, nws yuav tsum tau ua kom ntseeg tau tias cov khoom lim lim tawm tuaj yeem cuam tshuam cov kev sib raug zoo thiab them nyiaj rau lub zog tsis zoo rau cov zaus siab dua 250HZ thiab 350HZ txhawm rau txhim kho lub zog.
txoj haujlwm tsim
Cov khoom siv hluav taws xob zoo tshaj plaws ntawm cov khoom siv hluav taws xob inverter sib xyaw nrog txhua 2500 kVA transformer yog them los ntawm 0.8 txog 0.92.Cov khoom siv lim dej yuav tsum tau nruab nrog lub peev xwm ntawm 900 kWh.Lub peev xwm ntawm 11 pawg ntawm theem-splitting yog sib npaug rau cov windings nyob rau hauv qab voltage sab ntawm lub transformer yuav tsum tau kev cob cog rua thiab disconnected txiav.Lub peev xwm hloov kho kev faib tawm yog 45KVAR, uas tuaj yeem ua tau raws li ntau lub zog yuav tsum tau ua ntawm cov pib muag muag thiab cov kab ntau lawm.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
Nyob rau lub Rau Hli 2011, lub inverter lim reactive zog them nyiaj ntaus ntawv raug ntsia thiab muab tso rau hauv kev ua haujlwm.Cov cuab yeej cia li taug qab qhov kev hloov pauv ntawm lub inverter, tam sim ntawd suppresses high-order mem tes tam sim no los them cov nqi reactive, thiab txhim kho lub zog.cov ntsiab lus raws li hauv qab no:
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 li 0.8 thaum lub tshuab lim dej raug tshem tawm)
Kev ua haujlwm thauj khoom
Kev khiav hauj lwm tam sim no ntawm 2500KVA transformer yog txo los ntawm 2700A mus rau 2300A, thiab tus nqi txo yog 15%.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 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 * 2 = 134,000 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 kWh).
fais fab xwm txheej xwm txheej
Lub tuam txhab cov khoom siv hluav taws xob muaj zog tau nce los ntawm 0.8 mus rau 0.95 lub hlis no, thiab lub zog hluav taws xob yuav raug tswj hwm ntawm 0.96-0.98 nyob rau lub hli tom ntej, thiab cov nqi zog yuav nce 5000-6000 yuan nyob rau lub Ib Hlis.
Feem ntau, qhov tsawg-voltage reactive fais fab nyiaj them ntawm lub soft starter lim muaj ib tug zoo heev muaj peev xwm mus suppress pulse tam sim no thiab compensate reactive zog, daws qhov teeb meem ntawm reactive hwj chim rau txim ntawm lub tuam txhab, ua rau kom cov zis ntim ntawm lub transformer, thiab txo. lub zog ua haujlwm Cov khoom siv ntxiv ntawm cov khoom tau nce cov zis, coj cov txiaj ntsig kev lag luam rau lub tuam txhab, thiab rov qab tau cov neeg siv khoom peev hauv ib xyoos.Yog li ntawd, lub soft starter lim reactive fais fab nyiaj them 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