APF (Active Power Filter) feem ntau yog siv los tshem tawm cov kev sib haum xeeb twg

I. Dab tsi yog qhov Active Power Filter (APF)?

Lub Zog Hluav Taws Xob Hluav Taws Xob (APF) yog cov cuab yeej siv hluav taws xob siv hluav taws xob siv hluav taws xob, feem ntau siv hauv cov tshuab hluav taws xob kom tshem tawm cov kev sib raug zoo, them nyiaj rau lub zog reactive, thiab txhim kho lub zog zoo. Tsis zoo li cov ntxaij lim dej ib txwm siv, cov lim dej nquag siv cov khoom siv hluav taws xob hluav taws xob rau kev tswj hwm dynamic. Los ntawm kev ua piv txwv thiab ua cov qauv nthwv dej tam sim no hauv lub sijhawm tiag tiag -, lawv tsim cov nyiaj them tam sim no tawm tsam cov kev sib raug zoo, yog li tshem tawm cov kev sib raug zoo hauv lub zog.

 

II. Cov peev txheej thiab kev phom sij ntawm Harmonics

Harmonics hais txog qhov sib txawv ntawm qhov tam sim no lossis qhov hluav taws xob waveforms hauv lub zog hluav taws xob los ntawm cov duab sinusoidal, ua rau tam sim no los yog voltage waveforms nrog zaus uas yog cov zauv ntau ntawm cov zaus. Cov khoom siv sib xyaw ua ke muaj xws li cov khoom siv tsis sib xws xws li cov khoom siv hluav taws xob ntau zaus, cov tswj kev ceev, cov hluav taws xob arc, inverters, thiab cov khoom siv hluav taws xob hluav taws xob.

1. Lub xub ntiag ntawm harmonics tuaj yeem ua rau muaj ntau yam teeb meem:

1.1 Cov khoom siv overheating, txo cov kev pab cuam lub neej;

1.2 Txo efficiency ntawm lub hwj chim system;

1.3 Cov khoom siv tsis ruaj khov ua haujlwm, lossis txawm tias ua haujlwm tsis zoo;

1.4 Kev cuam tshuam nrog cov khoom siv sib txuas lus.

 

III. Harmonic Orders Eliminated los ntawm APF Active Power Filters

Tshwj xeeb, APF tuaj yeem tshem tawm cov kev txiav txim siab sib haum xeeb hauv qab no:

1. Tsawg-txoj kev sib haum xeeb (3rd, 5th, 7th, thiab lwm yam)

1.1 3rd harmonic: Feem ntau tshwm sim los ntawm peb -theem unbalanced loads los yog cov khoom siv xws li zaus converters, nws yog qhov tsawg tshaj plaws - txiav txim harmonic nyob rau hauv lub hwj chim systems. APF tuaj yeem them rov qab rau qhov kev sib raug zoo thib 3 hauv lub sijhawm tiag -, txhim kho daim phiaj zoo.

1.2 5th harmonic: Feem ntau pom nyob rau hauv cov khoom siv nrog rectifiers, xws li AC lub cev muaj zog tsav. APF tuaj yeem tshem tawm cov kev sib raug zoo no, tiv thaiv kev puas tsuaj rau cov khoom siv.

1.3 7th thiab siab dua-order harmonics: Qee lub zog hluav taws xob hluav taws xob, xws li arc furnaces thiab thyristor rectifiers, tuaj yeem tsim 7th thiab siab dua -order harmonics. APF tuaj yeem tswj hwm qhov siab dua no - xaj kev sib haum xeeb, ua kom muaj kev ruaj ntseg ntawm lub zog.

2. Siab -txoj kev sib haum xeeb (11th, 13th, thiab siab dua)

Siab -kev txiav txim siab feem ntau yog tsim los ntawm cov khoom siv xws li siab - zaus hloov hluav taws xob thiab PWM zaus converters. Txawm hais tias cov siab no - kev txiav txim siab sib haum xeeb muaj cov amplitudes me, lawv cov zaus ntau dua ua rau lawv ua rau muaj kev cuam tshuam hauv lub zog, ua rau txo qis kev ua haujlwm. APF tuaj yeem tswj hwm cov qib siab no - xaj kev sib haum xeeb, tiv thaiv lawv los ntawm kev cuam tshuam rau lub cev.