Cov ntaub ntawv tseem ceeb ntawm cov neeg siv
Kev kho dej phwj hauv tsev tseem ceeb ntawm lub tuam txhab kho dej khib nyiab, kev hloov hluav taws xob ib feem ntawm kev kho dej khib nyiab siv DC hloov pauv zaus tsav lub cev muaj zog, nrog 1000KVA2, 630KVA transformers.Daim duab ntawm lub hwj chim mov system yog raws li nram no:
Cov ntaub ntawv ua haujlwm tiag tiag
Lub zog tso zis ntawm 1000KVA transformer soft starter yog 860KVA, qhov nruab nrab lub zog yog PF = 0.83, ua haujlwm tam sim no yog 1250A, ua haujlwm tam sim no yog 630KVA, lub zog hluav taws xob yog PF = 0.87, thiab tam sim no ua haujlwm yog 770A.Yog li tag nrho cov hwj huam tuaj yeem tsuas yog 0.84.
Power System Situation Analysis
Lub ntsiab load ntawm lub converter ballast yog 6 ib leeg-pulse ballasts.Cov khoom siv ballast ua rau muaj ntau cov mem tes tam sim no hauv kev ua haujlwm ntawm kev hloov AC rau DC.Nws yog ib qho khoom siv hluav taws xob tam sim no thiab nkag mus rau hauv daim phiaj hluav taws xob.Harmonic tam sim no ua rau lub zog ua haujlwm tam sim no mus rau cov yam ntxwv impedance ntawm daim phiaj hluav taws xob, ua rau lub cev poob ntawm kev ua haujlwm voltage thiab tam sim no, ua rau muaj kev phom sij rau kev ua haujlwm zoo thiab kev nyab xeeb ntawm kev hloov cov khoom siv hluav taws xob, nce kab poob thiab ua haujlwm voltage sib txawv, thiab ua rau muaj kev cuam tshuam tsis zoo. daim phiaj fais fab thiab fais fab nroj tsuag lawv tus kheej Influence.
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, ib tug tsawg-voltage reactive hwj chim them nyiaj lim nrog ib tug mem tes tam sim no suppression muaj nuj nqi yuav tsum tau siv los suppress lub mem tes tam sim no ntawm lub cev, them nyiaj rau reactive load, thiab txhim kho lub hwj chim.
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, cov txheej txheem ntawm cov hluav taws xob them nyiaj rov qab rau lub tshuab hluav taws xob inverter uas tau txiav txim siab tag nrho cov khoom siv hluav taws xob thiab cov hluav taws xob hluav taws xob tam sim no raug tsim, thiab cov txheej lim dej tsis tshua muaj hluav taws xob tau teeb tsa ntawm 0.4kV hauv qab voltage. sab ntawm lub tuam txhab transformer Reactive fais fab nyiaj them rau suppress pulse tam sim no, compensate reactive load, thiab txhim kho lub hwj chim.
Lub ballast generates 6K-1 kev txiav txim mem tes tam sim no thaum lub sijhawm ua haujlwm ntawm lub converter, thiab siv cov nplooj ntawv code ib ntus nyob ib ncig ntawm 5250Hz thiab 7350Hz los ua kom tiav qhov kev hloov pauv hloov.Yog li ntawd, lub reactive fais fab kev them nqi tsim ntawm lub intermediate zaus induction rauv lim yuav tsum coj 250Hz, 350Hz thiab zaus tsim raws li lub hom phiaj, thiaj li yuav xyuas kom meej tias cov nyiaj them ceg ntawm lub lim yuav zoo suppress lub mem tes tam sim no cov nyiaj them, thiab tib yam. lub sij hawm suppress lub reactive load thiab txhim kho lub hwj chim Factor.
txoj haujlwm tsim
Lub zog loj tshaj plaws ntawm 1000KVA transformer ntau lawm kab yog them los ntawm 0.8 txog 0.95.Cov khoom siv lim dej yuav tsum tau nruab nrog lub ntim ntawm 380KVar, uas tau muab faib ua plaub pawg, txhua tus tau raug kaw thiab txiav tawm, them nyiaj rau cov cua ntsawj ntshab ntawm sab hauv qab voltage ntawm lub transformer, thiab muaj cov kauj ruam hloov ntim ntawm 45KVAR, uas tuaj yeem muab tso rau hauv cov khoom siv hluav taws xob tso tawm ntawm cov kab ntau lawm.Lub zog tseem ceeb yog them los ntawm 0.8 txog 0.95.Cov khoom siv lim dej yuav tsum tau nruab nrog lub ntim ntawm 310KVar, thiab plaub pab pawg tau txiav tawm kom them nyiaj rau qhov qis qis ntawm lub tshuab hloov pauv, thiab qhov ntim tau hloov kho rau 26KVAR kom ua tau raws li qhov xav tau ntawm kev ua haujlwm ntawm cov kab ntau lawm.
Kev tsom xam cov nyhuv tom qab kev teeb tsa ntawm cov nyiaj lim dej
Thaum Lub Yim Hli 2010, lub inverter filtering reactive zog them nyiaj ntaus ntawv tau teeb tsa thiab muab tso rau hauv kev ua haujlwm.Cov cuab yeej cia li taug qab qhov kev hloov pauv ntawm lub inverter, suppresses high-order harmonics nyob rau hauv lub sij hawm ntawm lub sij hawm, compensates reactive zog, thiab txhim kho lub hwj chim.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 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 1000KVA transformer yog txo los ntawm 1250A mus rau 1060A, poob ntawm 15%;Tam sim no siv los ntawm 630KVA transformer yog txo los ntawm 770A mus rau 620A, poob ntawm 19%.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 cov nqi hluav taws xob yog 16 * 20 * 30 * 10 * 0.7 = 67,000 yuan (raws li kev ua haujlwm 20 teev a hnub, 30 hnub ib hlis, 10 lub hlis ib xyoos, 0.7 yuan ib kWh).
Kev ua haujlwm thauj khoom
Tam sim no siv los ntawm 1000KVA transformer yog txo los ntawm 1250A mus rau 1060A, poob ntawm 15%;Tam sim no siv los ntawm 630KVA transformer yog txo los ntawm 770A mus rau 620A, poob ntawm 19%.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 cov nqi hluav taws xob yog 16 * 20 * 30 * 10 * 0.7 = 67,000 yuan (raws li kev ua haujlwm 20 teev a hnub, 30 hnub ib hlis, 10 lub hlis ib xyoos, 0.7 yuan ib kWh).
Post lub sij hawm: Apr-14-2023