Muaj peev xwm 2-50th lub harmonic yuav tswj hwm los ntawm kev siv apf (nquag siv fais fab lim)?

Hauv lub ntsej muag ntawm cov nyom - band hammonic paponic, lub zog lim dej ntawm Apf (nquag ua kom pom tseeb hauv kev lag luam. Hauv cov hauv qab no, peb yuav txheeb xyuas cov kev siv ua kom muaj zog thiab ua kom zoo dua ntawm kev sib haum xeeb los ntawm 2 mus rau 50 mus txog ntawm kev pom ntawm cov ntawv thov.

I. Kev ntsuam xyuas ntawm kev tswj hwm kev tswj hwm yooj yim

Tus qauv APF tuaj yeem tswj hwm 2 txog 25 Harmonic chancencies, nrog kev them nqi feem ntau ncav tau ntau dua 90%. Rau siab - zaus ua kom sib txawv ntawm 25 mus txog rau qhov kev hloov pauv zaus, cov pa Apf cov nyhuv tswj tau maj mam. APF siv cov khoom siv SIC tuaj yeem txuas ntxiv cov kev tswj kom muaj txiaj ntsig zoo tshaj plaws rau 50 mus txog, txo qhov kev hloov pauv tsis ntau tshaj 40%.

Ii. High - zaus harmonic tswj thev naus laus zis

Txhawm rau tswj hwm 50thnity harmonic zaus (2500Hz), qhov tsawg kawg nkaus hloov ntawm 12kHz yuav tsum muaj. Nws raug nquahu kom siv peb {-} QIB QEEM TOPICYRY. Los ntawm kev ua haujlwm sib txuas lus sib txuas lus zoo li kev kho tshuab, lub siab- zaus ua kom muaj kev sib raug zoo tuaj yeem tiv thaiv tau thaum lub sijhawm kho mob. Tus tsim qauv ntawm cov lim digital yuav tsum ua kom zoo rau cov pab pawg ncua cov yam ntxwv kom tsis txhob muaj theem distortion hauv qhov siab siab. Hauv kev tsim kho engineering, kev ua tau zoo ntawm 50th harmonic kev kho mob feem ntau nyob hauv thaj tsam ntawm 75% mus rau 85%.

III. Hybrid Lim Txheej Txheem

Qhov "APF + passive lim" hybrid system yog kev lag luam thiab txuag tau zoo. Lub lim passive ua raws li 5/7/11 thiab lwm yam cwj pwm sub {}}}} zaus thiab inter- kev sib haum xeeb. Txoj kev daws teeb meem no tuaj yeem ua kom cov thollv zuag qhia tag nrho ntawm cov kab ke tsis pub dhau 3%, thiab cov nqi peev yog 30% qis dua li ntawm kev daws teeb meem dawb huv. Tus yuam sij yog txhawm rau ua kom cov impedance txuam thiab tiv thaiv kev sib tw thaum lub rooj sib tham ntawm kev hloov pauv.

IV. Kev ua kom zoo ntawm kev tswj algorithms

Cov txheej txheem zoo nkauj tau txais cov ntsiab lus hauv qab no: Ceev FORT ua haujlwm (<1ms), adaptive filtering function, and weighted processing of high-frequency components. It is recommended to adopt the sliding window DFT algorithm, with a frequency resolution of up to 1Hz. For rapidly changing harmonics, the predictive control mode can be enabled to compensate for the delay effect. Special attention should be paid to the sampling accuracy in the high-frequency band; it is recommended to use ADC chips with 16 bits or higher.

V. Cov Ntaub Ntawv Teev Npe

Thaum lub zog muaj zog ntawm cov ntaub ntawv Center Center Origance neeg rau zaub mov tshwm sim, tus nqi them rau hnub 23/25 siab} cov Cheebtsam muaj ntau dua 80%. Rau photovoltaic lub zog cuam tshuam nrog inverter hloov Harmonics (~ 35 zaug), cov lim dej tshwj xeeb yuav tsum tau teeb tsa. Cov khoom siv kho mob yuav tsum muaj kev nce nqi ntawm ultra {{}} Cov kev cuam tshuam loj hauv 45 lub sijhawm hloov pauv ntau dua lossis sib npaug rau 20 KHUCE yuav tsum tau xaiv tau ntau dua lossis sib npaug rau 20 KHU.

VI. Cov Khoom Siv Xaiv

Rau kev tswj hwm ntawm cov kev sib raug zoo dav dav, cov qauv hauv qab no yuav tsum yog> 30%, qhov kev sib tshuam ntawm lub lim dej uas muaj ntau dua lossis sib npaug nrog 5kHz. Them sai sai rau cov ntsuas hauv lub siab- qhov ntau ntawm cov kev ua raws li 40-50th Harmonics yuav tsum yog> 15DB. Lub kaw lus yuav tsum muaj kev tsom xam spectrum thiab tuaj yeem txheeb xyuas qhov kom pom zoo kom muaj txiaj ntsig zoo sib xws.

Lub apf kev kho mob ntawm Harmonics xws li 2 mus rau 50 cov khoom pov thawj cov yam ntxwv ntawm "tsawg} kev txhim kho ntawm cov nquag". Rau cov ntaub ntawv sau ncaj ncees nrog kev xav tau THD tsawg dua 5%, ntau - theem lim daws tau pom zoo. Thaum lub sijhawm ua haujlwm, cov teeb meem tam sim no yuav tsum yog ntsuas kom tsis tu ncua. Yog tias qhov sib txawv ntawm kev kho siab nyob rau hauv high {8} Kev Kho Mob Ntau Dua 10%, Parameter kev hloov kho yog qhov tsim nyog.