Cov kev sib haum xeeb hauv daim phiaj hluav taws xob feem ntau yog tsim los ntawm lub peev xwm loj hloov hluav taws xob thiab lwm yam tsis muaj hluav taws xob, cov khoom siv hluav taws xob tseem ceeb yog txhua yam ntawm cov khoom siv hluav taws xob hluav taws xob, xws li cov khoom siv hluav taws xob rectifier, ac voltage regulation device, ntawm lawv, feem ntau ntawm cov khoom siv rectifier loj, Nws yog yuav luag ib txwm siv nrog lub capacitor lim diode rectifier tswj thiab tsis thyristor phased rectifier, Lawv harmonic pollution thiab reactive zog noj yog paub zoo. Ntxiv nrog rau cov cuab yeej rectification, chopping thiab daim ntawv thov ntawm inverter ntaus ntawv yog heev heev, thiab cov input dc zog kuj los ntawm lub rectifying ntaus ntawv, yog li qhov teeb meem harmonic yog heev loj, tshwj xeeb tshaj yog los ntawm dc voltage qhov chaw fais fab chopper thiab inverter ntaus ntawv. , dc voltage qhov chaw feem ntau yog los ntawm diode tsis tswj rectifier thiab capacitor lim, hom khoom siv rau kab sib chaws sib haum xeeb ua rau muaj kev cuam tshuam ntau dua.
Txhawm rau txhawm rau tiv thaiv kev sib haum xeeb hauv daim phiaj hluav taws xob thiab txo qhov kev puas tsuaj ntawm kev sib raug zoo, thaum txhawb kev tshawb fawb thiab kev tswj hwm kev cai lij choj, kev ua haujlwm zoo thiab kev ua haujlwm yuav tsum tau ua kom txo qis cov ntsiab lus sib haum xeeb ntawm cov khoom siv hluav taws xob ntau li ntau tau, thiab cov cuab yeej lim dej yuav tsum tau teeb tsa. .
1. Siv cov kev ntsuas kom txo tau cov ntsiab lus sib haum xeeb ntawm cov khoom siv hluav taws xob hluav taws xob
Qhov kev txo qis ntawm cov ntsiab lus sib haum xeeb feem ntau yog los ntawm lub converter nws tus kheej, los ntawm cov qauv tsim ntawm lub converter thiab ntxiv rau kev tswj xyuas lub tswv yim kom txo lossis tshem tawm kev sib haum xeeb. Lub ntsiab technologies siv tam sim no yog:
1) Multi-pulse converter Technology Rau cov khoom siv hluav taws xob muaj zog, cov khoom siv hluav taws xob 6-pulse feem ntau tsim los ua 12-pulse converter lossis 24-pulse converter kom txo cov ntsiab lus tam sim no ntawm AC sab.
2) Lub tswv yim ntawm pulse width modulation thev naus laus zis yog los tswj txhua lub sijhawm hloov pauv ntawm PWM tso zis waveform kom ntseeg tau tias qhov sib luag ntawm ib lub hlis twg ntawm lub waveform. Lub harmonic amplitude yuav tsum tau muab tshem tawm yog xoom thiab lub hauv paus amplitude yog qhov muab kom muaj nuj nqis, thiaj li mus tshem tawm cov kev sib haum xeeb tsim thiab tswj lub hauv paus amplitude.
3) Multi-theem converter thev naus laus zis rau ntau lub zog hluav taws xob hluav taws xob hloov pauv siv ntau txoj hauv kev hloov pauv, kev tswj hwm thiab kev tswj hwm asymmetric kom sib npaug square yoj tam sim no lossis qhov hluav taws xob, yog li tam sim no lossis qhov hluav taws xob tsim los ntawm lub converter ntawm AC fais fab tuag sab yog ze li ntawm sinusoidal kauj ruam nthwv dej, thiab tuav ib theem kev sib raug zoo nrog lub hwj chim mov voltage.
2. Nruab cov lim fais fab los txhim kho kev lim dej
(1) Passive zog lim
Passive fais fab lim (PPF) yog tsim los ntawm LC tuning Circuit Court los ntawm capacitor thiab reactor, uas tuaj yeem muab cov kev sib txuas uas tsis muaj zog rau kev sib haum xeeb hauv lub cev thiab ua lub luag haujlwm ntawm kev lim dej. Nyob rau tib lub sijhawm, lub zog reactive tuaj yeem them rov qab thiab lub zog tuaj yeem txhim kho. Vim nws cov qauv yooj yim, tus nqi qis, kev khiav hauj lwm qis thiab cov kev xav tau qis, PPF tau dhau los ua cov cuab yeej siv los txhim kho lub zog zoo. Txawm li cas los xij, vim yog vim li cas ntawm cov qauv thiab cov hauv paus ntsiab lus, cov khoom siv lim passive los daws qhov teeb meem kev sib haum xeeb kuj muaj qee qhov nyuaj rau kev kov yeej qhov tsis txaus, xws li: tuaj yeem lim cov kev sib haum xeeb xwb, kev sib haum xeeb nyiaj pab pawg yog nqaim, lub peev xwm dhau me me, lub kaw lus. impedance thiab zaus hloov pauv tsis zoo adaptability, tsis zoo stability, loj ntim, loj poob thiab lwm yam.
(2) Lub tshuab lim dej muaj zog
Nws tuaj yeem tshem tawm cov kev sib haum xeeb los ntawm kev kuaj xyuas qhov sib haum xeeb tam sim no hauv daim phiaj hluav taws xob, thiab tom qab ntawd tswj hwm lub inverter Circuit Court los tsim cov khoom sib xws tam sim no thiab txhaj rau hauv daim phiaj hluav taws xob. APF tuaj yeem muab faib ua hom series, hom sib txuas thiab series-parallel hybrid hom raws li hom kev sib txuas sib txawv nrog lub kaw lus. Parallel APF yog qhov tsim nyog rau kev sib raug zoo ntawm cov khoom siv hluav taws xob tam sim no, series APF feem ntau yog siv los tshem tawm cov kev cuam tshuam ntawm voltage hom harmonic qhov chaw thauj khoom xws li diode rectifier circuit nrog capacitor ntawm lub kaw lus, series-parallel APF muaj cov haujlwm ntawm series thiab parallel APF.
Cov pa phem hnyav zuj zus ntxiv tau ua rau muaj kev mloog zoo los ntawm txhua sab. Nrog rau kev nkag siab ntxiv ntawm kev sib haum xeeb, cov txheej txheem ua tau zoo dua yuav raug pom kom tshem tawm thiab tshem tawm cov kev sib haum xeeb, thiab cov qauv kev tswj hwm kev sib haum xeeb tsim nyog yuav raug tsim. Txhawm rau kom ua tiav cov txiaj ntsig zoo sib haum xeeb, qhov sib txawv ntawm qhov sib txawv yuav tsum tau txais cov qauv sib xws ntawm cov khoom siv lim, xws li cascade siab zog APF, ntse APF raws li DSP thiab lwm yam kev tshawb fawb cov cim uas tsis tshua muaj zog, siab zog, siab zaus, ntse. APF yog nws txoj kev txhim kho.