Niaj hnub no, nrog kev txhim kho sai ntawm kev tshawb fawb thiab thev naus laus zis thiab kev txhim kho txuas ntxiv ntawm qib kev kho mob, nws kuj tau nrog kev qhia txog ntau yam khoom siv kho mob loj heev, uas ua rau muaj kev sib haum xeeb ntau hauv cov chaw kho mob, uas ua rau muaj kev phom sij loj heev. rau kev nyab xeeb hluav taws xob thiab kev ua haujlwm ib txwm muaj ntawm cov khoom siv kho mob.Cov cuab yeej lim dej nquag tau dhau los ua cov cuab yeej tseem ceeb los daws qhov teeb meem no.
1.1 Cov Khoom Siv Kho Mob
Muaj ntau lub zog hluav taws xob cov khoom siv hauv cov khoom siv kho mob, thiab cov cuab yeej no yuav tsim cov khoom sib haum xeeb ntau thaum ua haujlwm, ua rau muaj kuab paug.Cov cuab yeej siv ntau dua yog MRI (nuclear magnetic resonance instrument), CT tshuab, X-ray tshuab, DSA (lub plawv sib piv tshuab) thiab lwm yam.Ntawm lawv, RF pulse thiab alternating magnetic teb yog generated thaum lub sij hawm MRI ua hauj lwm los tsim nuclear magnetic resonance, thiab ob qho tib si RF pulse thiab alternating magnetic teb yuav coj harmonic pa phem.Rectifier choj ntawm lub high-voltage rectifier nyob rau hauv lub X-ray tshuab yuav tsim loj harmonics thaum nws ua hauj lwm, thiab lub X-ray tshuab yog ib tug transient load, qhov voltage yuav ncav cuag kaum tawm txhiab volts, thiab thawj sab ntawm lub transformer yuav ua rau kom lub instantaneous load ntawm 60 mus rau 70kw, uas yuav ua rau kom lub harmonic yoj ntawm daim phiaj.
1.2 Cov khoom siv hluav taws xob
Cov khoom siv cua tshuab hauv tsev kho mob xws li lub tshuab cua txias, kiv cua, thiab lwm yam, thiab cov khoom siv teeb pom kev zoo xws li cov teeb fluorescent yuav ua rau muaj kev sib haum xeeb ntau.Txhawm rau txuag hluav taws xob, tsev kho mob feem ntau siv cov kiv cua hloov pauv zaus thiab cov cua txias.Zaus converter yog ib qho tseem ceeb heev harmonic qhov, nws tag nrho cov harmonic tam sim no distortion tus nqi THD-i mus txog ntau tshaj 33%, yuav tsim ib tug loj tus naj npawb ntawm 5, 7 harmonic tam sim no muaj kuab paug daim phiaj.Nyob rau hauv cov khoom siv teeb pom kev zoo hauv tsev kho mob, muaj ntau lub teeb fluorescent, uas tseem yuav ua rau muaj ntau qhov sib haum xeeb tam sim no.Thaum ntau lub teeb fluorescent txuas nrog peb-theem plaub-xaim load, cov kab nruab nrab yuav ntws mus rau qhov loj thib peb qhov sib haum xeeb tam sim no.
1.3 Cov khoom siv sib txuas lus
Tam sim no, cov tsev kho mob yog computer network tswj, uas txhais tau hais tias tus naj npawb ntawm cov computers, video soj ntsuam thiab cov khoom siv suab muaj ntau, thiab cov no yog cov kev sib raug zoo.Tsis tas li ntawd, tus neeg rau zaub mov uas khaws cov ntaub ntawv hauv lub computer network tswj system yuav tsum tau nruab nrog lub zog thaub qab xws li UPS.UPS thawj zaug kho cov hluav taws xob hauv hluav taws xob rau hauv qhov tam sim no ncaj qha, ib feem ntawm cov khoom khaws cia hauv lub roj teeb, thiab lwm qhov yog hloov mus rau hauv kev tswj hwm AC lub zog los ntawm inverter los muab lub zog rau lub nra.Thaum lub mains davhlau ya nyob twg yog muab, lub roj teeb muab lub zog rau lub inverter mus ua hauj lwm thiab xyuas kom meej lub cev ua hauj lwm ntawm lub load.Thiab peb paub tias lub rectifier thiab inverter yuav siv IGBT thiab PWM thev naus laus zis, yog li UPS yuav tsim ntau 3, 5, 7 harmonic tam sim no ntawm kev ua haujlwm.
2. Kev puas tsuaj rau cov khoom siv kho mob
Los ntawm cov lus piav qhia saum toj no, peb tuaj yeem pom tias muaj ntau qhov kev sib haum xeeb hauv kev faib khoom hauv tsev kho mob, uas yuav tsim muaj ntau qhov sib haum xeeb (nrog rau 3, 5, 7 harmonics raws li feem ntau) thiab ua phem rau cov kab hluav taws xob, ua rau hwj chim zoo teeb meem xws li harmonic tshaj thiab nruab nrab harmonic overload.Cov teeb meem no tuaj yeem cuam tshuam rau kev siv cov cuab yeej kho mob.
2.1 Kev puas tsuaj ntawm kev sib haum xeeb rau cov khoom siv duab
Vim muaj kev cuam tshuam ntawm kev sib haum xeeb, cov neeg ua haujlwm kho mob feem ntau ntsib cov khoom siv tsis ua haujlwm.Cov kev ua yuam kev no tuaj yeem ua rau cov ntaub ntawv yuam kev, cov duab tsis pom tseeb, cov ntaub ntawv poob thiab lwm yam teeb meem, lossis ua rau cov khoom siv hluav taws xob puas tsuaj, ua rau cov khoom siv kho mob tsis tuaj yeem ua haujlwm li qub.Tshwj xeeb, thaum qee cov khoom siv duab raug cuam tshuam los ntawm kev sib haum xeeb, cov khoom siv hluav taws xob sab hauv tuaj yeem sau cov kev hloov pauv thiab hloov cov zis, uas yuav ua rau muaj kev sib tshooj deformation lossis tsis meej pem ntawm cov duab waveform, uas yooj yim rau kev kuaj pom tsis zoo.
2.2 Kev puas tsuaj ntawm kev sib haum xeeb rau kev kho mob thiab cov cuab yeej kho mob
Muaj ntau yam khoom siv hluav taws xob siv hauv kev kho mob, thiab cov cuab yeej phais yog qhov feem ntau puas los ntawm kev sib haum xeeb.Kev kho mob phais yog hais txog kev kho mob ntawm laser, high-frequency electromagnetic yoj, hluav taws xob, microwave, ultrasound, thiab lwm yam. ib leeg lossis koom nrog kev phais ib txwm.Cov cuab yeej muaj feem cuam tshuam nrog kev cuam tshuam kev sib raug zoo, cov teeb liab tso tawm yuav muaj kev sib tsoo lossis ncaj qha mus rau lub teeb liab sib haum xeeb, ua rau muaj zog hluav taws xob stimulation rau cov neeg mob, thiab muaj kev nyab xeeb loj thaum kho qee qhov tseem ceeb.Cov cuab yeej kho mob xws li lub tshuab ua pa, lub tshuab pacemakers, ECG saib, thiab lwm yam, muaj feem cuam tshuam nrog lub neej ntawm cov neeg saib xyuas, thiab cov teeb liab ntawm qee cov twj paj nruag tsis muaj zog, uas yuav ua rau cov ntaub ntawv sau tsis raug lossis txawm tias tsis ua haujlwm thaum raug kev sib raug zoo. cuam tshuam, ua rau poob hnyav rau cov neeg mob thiab tsev kho mob.
3. Kev ntsuas kev sib raug zoo
Raws li qhov ua rau muaj kev sib haum xeeb, kev ntsuas kev kho mob tuaj yeem muab faib ua peb hom hauv qab no: txo qhov system impedance, txwv qhov kev sib haum xeeb, thiab txhim kho cov cuab yeej lim.
3.1 Txo qhov system impedance
Txhawm rau kom ua tiav lub hom phiaj ntawm kev txo qhov impedance ntawm lub kaw lus, nws yog ib qho tsim nyog los txo qhov hluav taws xob nyob deb ntawm cov khoom siv hluav taws xob uas tsis yog-linear thiab cov khoom siv hluav taws xob, hauv lwm lo lus, txhawm rau txhim kho cov khoom siv hluav taws xob.Piv txwv li, cov cuab yeej tseem ceeb ntawm lub tshuab steel yog hluav taws xob arc rauv, uas yog siv 35KV fais fab mov, thiab tau teeb tsa 35KV tshwj xeeb kab hluav taws xob los ntawm ob lub 110KV substations, thiab cov khoom sib haum xeeb siab dua ntawm 35KV tsheb npav.Tom qab siv qhov kev ncua deb ntawm tsuas yog 4 km 220KV substation teeb tsa 5 35KV tshwj xeeb kab hluav taws xob, cov kev sib haum xeeb ntawm lub tsheb npav tau zoo dua qub, ntxiv rau cov nroj tsuag kuj siv lub tshuab hluav taws xob loj dua synchronous, kom cov hluav taws xob nyob deb ntawm cov nonlinear. loads zoo heev txo, kom cov nroj tsuag generated harmonic txo.Txoj kev no muaj kev nqis peev loj tshaj plaws, yuav tsum tau koom tes nrog kev npaj tsim hluav taws xob tsim hluav taws xob, thiab tsim nyog rau cov phiaj xwm loj hauv kev lag luam, thiab cov tsev kho mob xav tau cov khoom siv hluav taws xob tsis tu ncua, feem ntau siv los ntawm ob lossis ntau lub chaw nres tsheb, yog li txoj kev no tsis yog ib qho qhov tseem ceeb.
3.2 Limiting harmonic sources
Txoj kev no yuav tsum tau hloov cov kev teeb tsa ntawm cov khoom sib haum xeeb, txwv txoj haujlwm ntawm kev tsim cov kev sib haum xeeb hauv ntau qhov ntau, thiab siv cov khoom siv nrog kev sib haum xeeb kom tshem tawm ib leeg.Qhov zaus ntawm cov yam ntxwv harmonics yog nce los ntawm kev nce qib ntawm cov converter, thiab cov txiaj ntsig zoo ntawm kev sib haum xeeb tam sim no txo qis heev.Txoj kev no yuav tsum rov qab kho cov khoom siv hluav taws xob thiab sib koom ua ke ntawm kev siv cov cuab yeej, uas muaj kev txwv siab.Lub tsev kho mob tuaj yeem hloov kho me ntsis raws li nws tus kheej qhov xwm txheej, uas tuaj yeem txo qhov kev sib haum xeeb rau qee yam.
3.3 Txhim kho lub Lim Ntaus
Tam sim no, muaj ob feem ntau siv AC lim khoom: passive lim ntaus ntawv thiabCov khoom siv lim dej (APF).Cov khoom siv lim dej tsis zoo, tseem hu ua LC lim ntaus ntawv, siv lub hauv paus ntsiab lus ntawm LC resonance los tsim cov ceg resonance series los muab cov channel impedance tsawg heev rau cov naj npawb tshwj xeeb ntawm kev sib haum xeeb kom lim tawm, kom tsis txhob txhaj tshuaj. rau hauv daim phiaj fais fab.Cov khoom siv lim dej tsis zoo muaj cov qauv yooj yim thiab pom tseeb kev sib haum xeeb, tab sis nws tsuas yog txwv rau kev sib haum xeeb ntawm lub ntuj zaus, thiab cov yam ntxwv them nyiaj muaj txiaj ntsig zoo rau daim phiaj impedance (ntawm ib qho tshwj xeeb, daim phiaj impedance thiab LC. Cov cuab yeej lim yuav muaj qhov sib npaug ntawm cov resonance lossis series resonance).Cov cuab yeej siv lim dej (APF) yog ib hom tshiab ntawm cov khoom siv hluav taws xob hluav taws xob, uas yog siv los ua kom muaj zog tiv thaiv kev sib raug zoo thiab them rov qab lub zog.Nws tuaj yeem sau thiab txheeb xyuas cov teeb liab tam sim no ntawm lub sijhawm thauj khoom hauv lub sijhawm, cais txhua lub zog sib haum xeeb thiab rov ua haujlwm, thiab tswj cov khoom siv hluav taws xob nrog kev sib haum xeeb thiab reactive tam sim no sib npaug amplitude thiab thim rov qab them nyiaj tam sim no los ntawm tus maub los kom offset qhov sib haum xeeb tam sim no hauv lub load, thiaj li ua tiav lub hom phiaj ntawm kev tswj hwm kev sib haum xeeb.Active limntaus ntawv muaj qhov zoo ntawm kev taug qab lub sijhawm, cov lus teb ceev ceev, kev them nyiaj zoo (reactive zog thiab 2 ~ 31 harmonics tuaj yeem them nyiaj rau tib lub sijhawm).
4 Daim ntawv thov tshwj xeeb ntawm APF cov khoom siv lim dej hauv cov tsev kho mob
Nrog rau kev txhim kho txuas ntxiv ntawm tib neeg txoj kev ua neej nyob thiab kev nrawm ntawm cov neeg laus, qhov kev thov rau cov kev pabcuam kho mob tau nce zuj zus, thiab kev lag luam kev pabcuam khomob tab tom yuav nkag mus rau lub sijhawm ntawm kev loj hlob sai, thiab cov neeg sawv cev tseem ceeb tshaj plaws thiab tseem ceeb ntawm kev lag luam kho mob. yog lub tsev kho mob.Vim tias muaj txiaj ntsig tshwj xeeb ntawm kev sib raug zoo thiab qhov tseem ceeb ntawm tsev kho mob, kev daws teeb meem ntawm nws lub hwj chim zoo yog qhov ceev.
4.1 APF xaiv
Cov txiaj ntsig ntawm kev tswj hwm kev sib haum xeeb, ua ntej ntawm tag nrho, yog los xyuas kom meej qhov kev nyab xeeb ntawm tus kheej ntawm cov neeg mob thiab cov neeg ua haujlwm kho mob, uas yog, txo lossis tshem tawm qhov cuam tshuam tsis zoo ntawm kev tswj hwm kev sib raug zoo ntawm kev faib khoom, kom ntseeg tau tias kev ua haujlwm ib txwm muaj ntawm transformers thiab cov cuab yeej kho mob. ;Qhov thib ob, nws ncaj qha cuam tshuam txog cov txiaj ntsig kev lag luam, uas yog, txhawm rau ua kom muaj kev ua haujlwm ib txwm muaj ntawm cov khoom siv hluav taws xob tsawg-voltage capacitance, ua si nws lub luag haujlwm, txo cov ntsiab lus sib haum xeeb hauv daim phiaj hluav taws xob, thiab txhim kho cov khoom siv hluav taws xob, txo cov hluav taws xob poob. , thiab txuas ntxiv lub neej kev pab cuam ntawm cov khoom siv.
Kev puas tsuaj ntawm kev sib haum xeeb rau kev kho mob kev lag luam yog qhov zoo heev, ntau qhov kev sib haum xeeb yuav cuam tshuam rau kev ua haujlwm thiab kev siv cov cuab yeej precision, thiab tuaj yeem ua rau muaj kev phom sij rau tus kheej hauv cov xwm txheej hnyav;Nws tseem yuav ua rau kom lub zog poob ntawm cov kab thiab cov cua kub ntawm tus neeg xyuas pib, txo cov kev ua haujlwm thiab lub neej ntawm cov khoom siv, yog li qhov tseem ceeb ntawm kev tswj hwm kev sib haum xeeb yog qhov tseeb.Los ntawm lub installation ntawmnquag limntaus ntawv, lub hom phiaj ntawm kev sib haum xeeb tswj yuav ua tau zoo, thiaj li ua kom muaj kev nyab xeeb ntawm tib neeg thiab khoom siv.Hauv lub sijhawm luv luv, kev tswj hwm kev sib haum xeeb xav tau qee qhov peev txheej peev hauv theem pib;Txawm li cas los xij, los ntawm txoj kev loj hlob mus sij hawm ntev, APFactive lim ntaus ntawvyog yooj yim los tswj nyob rau hauv lub sij hawm tom qab, thiab yuav siv tau nyob rau hauv lub sij hawm ntawm lub sij hawm, thiab cov txiaj ntsim kev lag luam coj los ntawm nws los tswj kev sib haum xeeb thiab cov txiaj ntsig kev sib raug zoo ntawm kev ua kom huv ntawm daim phiaj hluav taws xob kuj pom tseeb.
Post lub sij hawm: Jun-30-2023