Lub overvoltage generated thaum lub tshuab nqus tsev Circuit Court breakers hloov lub tsev txhab nyiaj capacitor yog ib qho teeb meem tshwm sim thiab tseem ceeb hauv cov tshuab hluav taws xob uas yuav tsum tau ua tib zoo mloog. Xws li overvoltage yuav ua rau muaj kev hem thawj rau lub rwb thaiv tsev ntawm capacitors, Circuit Court breakers, thiab tag nrho cov system. Cov hauv qab no yog ib qho kev ntsuam xyuas ntawm qhov teeb meem no thiab cov kev daws teeb meem:
Kev txheeb xyuas qhov ua rau Overvoltage Generation
Qhov laj thawj tseem ceeb tuaj yeem raug ntaus nqi los ntawm kev sib cuam tshuam ntawm cov yam ntxwv tawg ntawm lub tshuab nqus tsev hluav taws xob thiab lub zog cia cov yam ntxwv ntawm lub tsev txhab nyiaj capacitor, uas yog qhia tshwj xeeb xws li:
1. Hloov inrush tam sim no thiab ua haujlwm overvoltage
2. Mechanism: Thaum lub sijhawm kaw, qhov hluav taws xob thoob plaws lub txhab nyiaj capacitor yog xoom, thaum lub kaw lus qhov hluav taws xob yog nyob ntawm tus nqi tam sim. Qhov loj voltage sib txawv ntawm ob ua rau siab - zaus inrush tam sim no nrog ib tug loj heev amplitude thiab siab zaus (txog li ob peb mus rau kaum tawm lub sij hawm cov rated tam sim no).
Kev cuam tshuam: Lub siab - zaus inrush tam sim no ua rau siab - zaus voltage poob thoob plaws lub cev impedance, uas tej zaum yuav superimposed ntawm lub hwj chim zaus voltage los ua ib tug overvoltage ua hauj lwm. Nyob rau hauv cov ntaub ntawv ntawm ntau lub tsev txhab nyiaj capacitor ua hauj lwm nyob rau hauv parallel, thaum lwm lub tuam txhab capacitor txuas nrog lub txhab nyiaj capacitor (lossis system), qhov sib txawv ntawm qhov hluav taws xob yuav ntau dua, thiab cov teeb meem inrush tam sim no thiab overvoltage yuav hnyav dua.
Hloov Overvoltage (Core Issue)
Qhov no yog qhov tseem ceeb tshaj plaws thiab nyuaj ntawm overvoltage thaum lub tshuab nqus tsev twj tso kua mis siv los hloov cov capacitors, feem ntau cuam tshuam rau cov yam ntxwv ntawm lub tshuab nqus tsev:
Tam sim no chopping: Lub stability ntawm lub tshuab nqus tsev arc tsis zoo. Ntawm qhov qis tam sim no (xws li qis dua kaum ntawm amperes), lub arc yuav maj mam tua ua ntej tam sim no ib txwm hla xoom, uas yog hu ua "tam sim no chopping". Cov hluav taws xob hluav taws xob hluav taws xob (tus nqi ntawm lub capacitor) sib raug rau qhov sib tsoo tam sim no (feem ntau capacitive tam sim no) tsis tuaj yeem tso tawm tam sim ntawd, ua rau lub sijhawm tam sim no hla dhau ntawm lub capacitor uas siab dua qhov system voltage.
Ntau qhov kev txwv ntau dhau (qhov txaus ntshai tshaj plaws): Qhov no yog daim ntawv hnyav tshaj plaws ntawm overvoltage.
Thawj qhov kev txwv: Tom qab lub Circuit Court breaker qhib, qhov sib txuas sib txuas maj mam nce. Thaum qhov hluav taws xob seem ntawm lub capacitor (DC lossis qis- zaus) nyob rau hauv qhov sib txawv ntawm qhov system muab hluav taws xob, qhov hluav taws xob rov qab ntawm cov neeg sib cuag tuaj yeem tshaj qhov dielectric rov qab lub zog ntawm lub tshuab nqus tsev qhov sib txawv ntawm lub sijhawm ntawd, ua rau qhov sib txawv ntawm qhov sib txawv thiab qhov kev tawm tsam tshwm sim. Thaum lub sij hawm restrike, qhov voltage ntawm lub capacitor yuav oscillate ntawm lub system muab voltage los ntawm lub Circuit Court inductance.
Voltage "theem" nce: Qhov kev txwv tsis pub ua kom muaj qhov siab - zaus oscillating tam sim no. Lub tshuab nqus tsev vacuum breakers yog tshwj xeeb tshaj yog nyob rau hauv extinguishing arcs ntawm lub xoom- hla ntawm siab - zaus tam sim no. Yog tias qhov arc tau cuam tshuam zoo ntawm qhov thib ib lossis thib ob xoom- hla ntawm qhov siab- zaus tam sim no, lub capacitor yuav raug "xauv" ntawm tus nqi hluav taws xob tshiab. Raws li cov txheej txheem retrike tso tawm, tus nqi hluav taws xob tshiab no yuav siab dua qhov voltage ua ntej qhov kev tawm tsam.
Cov txheej txheem rov ua dua: Raws li qhov kev sib cuag txuas ntxiv mus ntxiv, qhov rov qab tau nce ntxiv, thiab qhov thib ob, thib peb, lossis ntau qhov kev txwv yuav tshwm sim. Txhua qhov kev tawm tsam tuaj yeem ua rau "kauj ruam" nce qhov voltage ntawm lub capacitor. Raws li txoj cai, tom qab ob peb retrikes, lub ncov overvoltage ntawm ob qhov kawg ntawm lub capacitor yuav ncav cuag peb zaug los yog txawm siab tshaj qhov system theem voltage.
Cov teeb meem tseem ceeb tshwm sim los ntawm overvoltage
1. Rau lub capacitor nws tus kheej: Overvoltage ncaj qha hem lub rwb thaiv tsev ntawm lub capacitor ntsiab, accelerates lub aging ntawm lub dielectric, thiab ntev - cov teebmeem yuav ua rau tawg, ua rau lub capacitor tawg.
2. Rau lub tshuab nqus tsev vacuum breakers: Ntau qhov kev tswj hwm tuaj yeem tsim cov hluav taws xob rov qab siab heev thiab kev tswj hwm tam sim no, ua kom cov hluav taws xob hnav ntawm cov neeg sib cuag thiab muaj peev xwm ua rau muaj kev puas tsuaj rau lub Circuit Court breaker nws tus kheej.
3. Rau lwm yam khoom siv hauv lub cev: Kev siv hluav taws xob ntau dhau tuaj yeem raug xa mus los ntawm cov kab, ua rau muaj kev phom sij rau cov khoom siv hluav taws xob sib txuas, cov twj paj nruag transformers, cables, thiab lwm yam khoom siv.
4. Kev ua haujlwm tsis raug lossis tsis ua haujlwm tiv thaiv: Qhov siab - cov txheej txheem hloov pauv zaus tuaj yeem cuam tshuam nrog kev kuaj ntsuas thiab kev txiav txim siab ntawm microcomputer- raws li cov khoom siv tiv thaiv.
Kev daws thiab Kev Tiv Thaiv Kev Tiv Thaiv
Cov kev daws teeb meem tseem ceeb yog nyob ib puag ncig "txhim kho qhov tam sim no", "tiv thaiv kev kav" thiab "absorbing/limiting overvoltage".
Ua kom zoo rau kev xaiv thiab siv cov khoom siv hluav taws xob.
1.Xaiv "C2 qib" lossis "capacitive tam sim no tawg siab" lub tshuab nqus tsev vacuum breakers: Qhov no yog qhov tseem ceeb tshaj plaws thiab kev ntsuas zoo. Cov hluav taws xob hluav taws xob no tau raug txheeb xyuas los ntawm cov kev ntsuam xyuas nruj thiab tuaj yeem xyuas kom meej tias tsis muaj kev txwv tsis pub tshwm sim lossis qhov tshwm sim ntawm kev txwv tsis pub muaj tsawg heev thaum rhuav tshem cov ntsuas tam sim no. Lawv cov ntaub ntawv sib tiv tauj, kev tsim qauv sib nqus, thiab cov txheej txheem tsim khoom yog txhua yam ua kom zoo rau cov khoom siv hluav taws xob.
Tsis txhob siv dav - lub hom phiaj lossis tsuas yog "L75" kev sim ntsuas hluav taws xob hluav taws xob: General- lub hom phiaj Circuit Court breakers tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm cov khoom siv hluav taws xob, tab sis lawv tsis tuaj yeem lav qhov kev ua haujlwm tawg rau cov khoom siv hluav taws xob.
Xyuas kom ruaj khov cov yam ntxwv: Xyuas kom lub Circuit Court breaker qhov qhib ceev yog ceev thiab ruaj khov txaus los tsim kom muaj qhov qhib txaus thiab txhim khu lub zog dielectric rov qab.
2. Kev teeb tsa ntawm Overvoltage Protection Devices
Hlau Oxide Arrester (MOA): Txuas nyob rau hauv parallel nyob rau hauv thaum pib ntawm lub capacitor bank los yog nyob rau hauv lub busbar sab, nws yog ib tug txheej txheem configuration rau limiting lub amplitude ntawm overvoltage. Nws tuaj yeem clamp lub overvoltage mus rau qib kev nyab xeeb. Cov qauv tsim nyog nrog kev ua haujlwm tsis tu ncua thiab qhov hluav taws xob seem yuav tsum raug xaiv thiab ntsia kom ze li sai tau rau lub txhab nyiaj capacitor.
RC Damping Absorption Circuit Court: Ib qho hluav taws xob sib txuas - cov kab hluav taws xob hluav taws xob tau teeb tsa hla cov kev sib txuas ntawm cov hluav taws xob lossis nruab nrab ntawm lub txhab nyiaj capacitor thiab lub breaker.
Muaj nuj nqi: Txhawm rau txo qhov nce ntawm qhov rov qab voltage (du / dt); los muab qhov qis -impedance txoj kev rau siab- zaus tam sim no uas yuav tshwm sim tom qab txwv thiab siv nws lub zog; txhawm rau txhawm rau cuam tshuam tam sim no overvoltage.
Tsim Cov Ntsiab Lus: Cov tsis muaj (R thiab C qhov tseem ceeb) yuav tsum tau muab xam raws li qhov system tsis ua kom tiav qhov zoo tshaj plaws damping nyhuv.
3. Txhim kho txoj kev ua haujlwm
Txais cov keyboards synchronous (theem xaiv kaw / tripping pab kiag li lawm): Los ntawm kev tswj lub Circuit Court breaker kom kaw thaum lub sij hawm qhov sib txawv ntawm qhov system voltage thiab qhov seem voltage ntawm lub capacitor yog qhov tsawg tshaj plaws (xws li nyob rau hauv lub xoom hla ntawm voltage), inrush tam sim no thiab overvoltage ntawm kaw yuav ** txo qis heev **. Ib yam li ntawd, nws tseem tuaj yeem tswj tau mus rau qhov tseeb ntawm qhov xoom hla ntawm tam sim no, txo qhov kev pheej hmoo ntawm kev cuam tshuam tam sim no. Qhov no yog tam sim no ib tug advanced technology rau suppressing kev ua hauj lwm overvoltage.
Txhim kho kev ua haujlwm zoo ib ntus: Rau cov tsev txhab nyiaj thaum lub sijhawm ua haujlwm, nws raug nquahu kom ua haujlwm raws li hauv qab no: thaum fais fab tuag, disconnect lub Circuit Court breaker ua ntej, ces qhov kev hloov pauv; Thaum lub hwj chim qhib, kaw qhov kev sib cais ua ntej, tom qab ntawd lub Circuit Court breaker. Tsis txhob ua haujlwm them tus nqi capacitors nrog rau kev hloov pauv.
4. Qhov System-Side Considerations
Series Reactors: Series reactors nrog qee qhov reactance tus nqi (feem ntau 0.5% mus rau 1% kom txwv tsis pub muaj kev cuam tshuam tam sim no thiab 5% mus rau 6% txhawm rau txhawm rau ua kom muaj kev sib haum xeeb) txuas nrog hauv lub tuam txhab nyiaj hauv tuam txhab.
Muaj nuj nqi: txwv qhov amplitude thiab zaus ntawm inrush tam sim no; tsim ib ceg lim nrog capacitors; kuj tuaj yeem hloov pauv cov kev txwv ntawm cov txheej txheem hloov pauv mus rau qee qhov thiab cuam tshuam rau cov xwm txheej txwv.
Tsim nyog Cov Hluav Taws Xob Layout: Ua kom luv txoj kab txuas ntev ntawm lub txhab nyiaj capacitor thiab lub Circuit Court breaker, txo lub voj inductan
Cov ntsiab lus thiab cov lus qhia
Cov teeb meem overvoltage tshwm sim los ntawm lub tshuab nqus tsev vacuum breakers hloov cov tsev txhab nyiaj capacitor yog qhov tsim nyog vim qhov kev tsis sib haum xeeb ntawm kev cuam tshuam tam sim no thiab txwv cov yam ntxwv ntawm lub tshuab nqus tsev arcs thiab lub zog cia cov yam ntxwv ntawm cov capacitor.
Cov tswv yim daws teeb meem yuav tsum ua raws li hauv qab no hierarchy:
1. Kev tiv thaiv ua ntej (hais txog cov hauv paus ntsiab lus): Thaum lub sij hawm tsim thiab kev yuav khoom, tsuas yog "C2 qib" los yog lub tshuab nqus tsev vacuum breakers tshwj xeeb tsim rau capacitor bank switching uas tau ntawv pov thawj los ntawm lub cev muaj cai yuav tsum tau xaiv.
2. Kev tiv thaiv raws li daim ntaub thaiv (hais txog cov tsos mob): Standardize lub configuration ntawm hlau oxide ntes (MOA) raws li txoj kab kawg ntawm kev tiv thaiv overvoltage.
3. Kev ua kom zoo raws li kev ntsuas kev pabcuam (txhim kho kev ua haujlwm): Nyob ntawm qhov project qhov tseem ceeb thiab kev siv nyiaj txiag, xav txog kev txhim kho RC damping circuits, synchronous keyboards, thiab rationally configuring series reactors.
4. Kev ua haujlwm thiab kev saib xyuas raws li lub hauv paus: tsis tu ncua xyuas cov yam ntxwv ntawm cov khoom siv hluav taws xob thiab cov xwm txheej ntawm cov neeg ntes, thiab ua raws li cov txheej txheem khiav haujlwm kom raug.
Nyob rau hauv kev tsim engineering, ib qho kev sib piv ntawm kev lag luam thiab kev lag luam yuav tsum tau ua los ntawm kev coj mus rau hauv tus account yam xws li qhov system voltage, capacitor bank peev, hom kev ua haujlwm thiab tus nqi, xaiv ib lossis ntau qhov sib xyaw ua ke ntsuas kom ntseeg tau tias muaj kev nyab xeeb thiab txhim khu kev lag luam ntawm lub cev.
ZN85B-40.5 miniaturized sab hauv tsev lub tshuab nqus tsev Circuit Court breaker
ZN85B-40.5 miniaturized sab hauv tsev lub tshuab nqus tsev Circuit Court breakeryog ib qho khoom siv me me 40.5kV tsim thiab tsim los ntawm peb lub tuam txhab. Nws tuaj yeem hloov pauv VD4-40.5 thiab HD4-40.5 series pem teb trolleys tsim los ntawm ABB. Cov koob no feem ntau suav nrog ob koob: cov hlau nplaum ruaj khov thiab lub caij nplooj ntoos hlav mechanism. Nws yog qhov ntsuas hluav taws xob 40.5KV, AC 50HZ sab hauv tsev switchgear tivthaiv.
tiv tauj peb
Shaanxi West Fais Fab Tongzhong Hluav Taws Xob Co., Ltd.
Hu rau: Ms.Grace Liu (Director of Sales Department)
Email: xdtz04@westpowerelectric.com
Txawb: +86 18091765882(WhatsApp/facebook)
Lub Vev Xaib: https://www.xdtzelectrical.com
Ntxiv: Nanpo Zos, Chencang Avenue Jintai District Baoji City, Shaanxi Province, Suav
