5% lossis 12%? Kev xaiv tsis raug Reactance piv hloov kev tiv thaiv rau hauv kev puas tsuaj - Phau Ntawv Qhia Kom Tsis txhob muaj qhov cuam tshuam hauv siab -Voltage Series Reactor Xaiv

Lub hauv paus ntawm kev xaiv lub siab -voltage tandem reactor tuaj yeem suav nrog hauv ib lo lus: reactance. Qhov tseeb reactance piv tuaj yeem ua "silencer" rau harmonics; Qhov tsis ncaj ncees lawm reactance tuaj yeem ua "amplifier" rau kev sib haum xeeb, muaj feem cuam tshuam rau lub txhab nyiaj ib txwm muaj kev nyab xeeb.
Qhov xaus yog: cov khoom sib xyaw ua ke raws li kev xaiv.
Raws li Clause 5.5.2 ntawm National Standard GB 50227-2017, qhov reactance ratio yuav tsum tau txiav txim raws li cov keeb kwm harmonic cov ntsiab lus ntsuas ntawm qhov kev sib txuas ntawm lub parallel capacitor bank thiab daim phiaj fais fab. Dub thiab dawb: qhov reactance yuav tsum yog 4.5% 4.5% - 5.0% thaum lub harmonic yog siab tshaj qhov thib tsib txiav txim, thiab 12.0% thaum lub harmonic yog siab tshaj qhov thib peb kev txiav txim. Hauv lwm lo lus, cov ntawv thov kev lag luam tau tswj hwm los ntawm 5 harmonics, yog li 5% ntawm cov reactor raug xaiv; Cov ntawv thov nyob hauv tsev tau tswj hwm los ntawm 3 qhov sib haum xeeb, yog li 12% ntawm cov reactor raug xaiv. Nws tsis yog mloog xwb, nws yog ib txoj cai ntawm kev coj ua.
Vim li cas peb tsis tuaj yeem ua "random" xwb? Vim tias qhov tshwm sim ntawm kev xaiv lub reactor tsis ncaj ncees lawm yog kev puas tsuaj.
Capacitors muaj impedance tsawg heev rau siab - zaus harmonics. Thaum lub Circuit Court resonates, lub harmonic tam sim no yog dramatically amplified. Ib txoj kev tshawb fawb los ntawm Tuam Tshoj Hluav Taws Xob Hluav Taws Xob Tshawb Fawb Lub Tsev Haujlwm tau pom ntev tias thaum cov lus teb yog 6 feem pua, qhov kev nthuav dav ntawm qhov thib peb harmonics yog ntau dua 5%. Uas tau hais tias, qhov koj tuaj yeem xav txog aa "kev sib haum xeeb" yog qhov tseeb "poob- poob" qhov xwm txheej- nws tsis yog raws nraim qhov thib tsib kev sib haum xeeb ntawm 5%, thiab nws yooj yim dua los nthuav qhov thib peb harmonic ntawm ntau dua 5%. Nws Tsis tas li ntawd muaj peev xwm ntau dua, siv zog ntau dua, raug nqi ntau dua thiab tsawg dua 5% kev lag luam hauv txhua yam. Qhov txaus ntshai tshaj, yog tias 5% reactor tsis sib haum hauv daim phiaj hluav taws xob uas tau tswj hwm los ntawm peb qhov kev sib haum xeeb, nws tsis tsuas yog ua tsis tau rau kev sib koom ua ke, tab sis kuj tuaj yeem ua rau muaj kev sib txuam sib luag, ua rau cov hluav taws xob sib txuas, cov khoom siv hluav taws xob tuaj yeem tawg thiab txawm tawg - tsis muaj exaggeration.
Los ntawm qhov sib txawv, txhim kho 12% ntawm lub reactor nyob rau hauv ib qho kev lag luam hluav taws xob daim phiaj tswj los ntawm tsib harmonics muaj kev nyab xeeb, tab sis kim. Qhov siab dua qhov reactance ntawm series reactor, qhov ntau dua qhov voltage nce ntawm lub capacitor terminals. Raws li UC=US/ (1-P) formula, qhov voltage nce li ntawm 6.4% qhov reactance yog 13% thiab 11.5% 11.5% reactance yog 13%. Qhov ntawd txhais tau tias koj siv nyiaj ntau ntawm 12% ntawm cov reactors, tab sis cov capacitors ua haujlwm ntev ntev nyob rau hauv overvoltage, zoo heev txo lawv txoj sia thiab txo cov nyiaj rov qab.
Puas muaj "universal solution"? Yog, tab sis koj yuav tsum paub siv nws li cas.
Tus txheej txheem txheeb xyuas txoj kev thib ob: a 4.5 4.5% - 5.0% a 12.0% reactance tus nqi sib xyaw tuaj yeem siv tau thaum qhov thib peb thiab thib tsib harmonics siab. Qee cov capacitors muaj 5% resistor los suppress tsib harmonics, thaum lwm tus muaj 12% resistor los suppress peb harmonics. Qhov no ua kom ntseeg tau tias tag nrho cov kev sib haum xeeb impedance yog inductive thiab zam qhov hluav taws xob nce thiab reactive zog poob vim yog ib tus nqi siab reactance. Qhov no yog txoj hauv kev tseem ceeb tshaj plaws hauv engineering tej yaam num xyaum nyob rau hauv xyoo tas los no thiab cov kev daws teeb meem tseem ceeb nyob rau hauv lub revised GB50227-2017 -tom qab tag nrho, qhov tseeb ntawm kuv lub teb chaws daim phiaj fais fab tuag yog peb-theem, tsib-theem, ib los yog lwm yam.
Lwm qhov teeb meem loj: txwv tsis pub muaj kev sib tsoo thiab tsis quav ntsej txog kev sib haum xeeb.
Hauv qee qhov haujlwm, cov ntsiab lus sib haum xeeb tsawg heev uas nws tsim nyog los txwv qhov excitation inrush. Hauv qhov no, aa reactance tus nqi ntawm 0.1% mus rau 1.0% yog txaus. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov tsawg reactance tus nqi no muaj qhov cuam tshuam loj heev ntawm qhov thib tsib thiab xya sib haum xeeb. Sai li qhov kev sib haum xeeb ntawm daim phiaj hluav taws xob hloov pauv, qhov kev tiv thaiv tam sim ntawd ua tsis tiav. Yog li ntawd, txawm tias nyob rau hauv cov ntaub ntawv ntawm "txwv inrush tam sim no," nws yog tsim nyog los xyuas kom meej tias harmonic amplification tshaj qhov txwv thiab tawm txaus margin.
Thaum kawg: yuav tsum ntsuas qhov tseeb ua ntej kev debugging.
Tus qauv yuav tsum muaj kev sib raug zoo nrhiav kom pom ua ntej txhua qhov haujlwm yuav tsum tau muab tso rau hauv kev ua haujlwm thiab qhov laj thawj ntawm kev teeb tsa reactance raug txheeb xyuas los ntawm cov ntaub ntawv ntsuas. Tsis txhob hla cov kauj ruam no -kev sib haum xeeb tsis txhob tos rau koj cov kev suav, lawv tuaj thaum koj ntseeg siab tshaj plaws.
5% lossis 12%? Cov lus teb tsis yog nyob rau hauv lub reactor nws tus kheej, tab sis nyob rau hauv lub harmonic spectrum ntawm koj cov ntsiab lus kev twb kev txuas.