Xov Xwm

I. Kev Taw Qhia: Qhov Xav Tau Kev Tiv Thaiv Sai Sai Hauv Cov Xwm Txheej DC High-Voltage thiab Tus Nqi Tseem Ceeb ntawm DC Isolation Switch

Nrog rau kev loj hlob sai ntawm lub zog tshiab, cov tshuab hluav taws xob DC siab (HVDC) tau siv dav hauv photovoltaic (PV), khaws cia hluav taws xob thiab kev thauj mus los ntawm tsheb ciav hlau. Lawv txoj kev ua haujlwm zoo yog qhov tseem ceeb, vim tias HVDC txoj kev taw qhia tam sim no ruaj khov thiab tsis muaj kev hla mus rau xoom ntuj ua rau kev sib cais thiab kev tiv thaiv qhov txhaum nyuaj. Yog li ntawd, cov khoom siv sib cais zoo thiab txhim khu kev qha yog qhov tseem ceeb.

Ua ib qho cuab yeej tiv thaiv HVDC tseem ceeb,DC Kev Rho Tawm Hloov(DC disconnect switch) cais cov circuits, txiav cov faults, thiab ua kom muaj kev nyab xeeb. Tsis zoo li AC switches, nws yog tsim tshwj xeeb rau cov DC arcs uas nyuaj tua, thiab nws cov kev ua tau zoo nyob rau hauv qhov hluav taws xob siab ncaj qha txiav txim siab qib kev tiv thaiv ntawm lub kaw lus.

Tsab xov xwm no piav qhia ntxiv txog qhovDC Kev Rho Tawm Hloovkev ua tau zoo thiab kev ntseeg tau zoo, tshuaj xyuas nws qhov tseem ceeb hauv kev tiv thaiv HVDC los coj kev xaiv daim ntawv thov.

II. Kev Ua Tau Zoo Tshaj Plaws: Kev Hloov Kho Rau Cov Xwm Txheej Muaj Hluav Taws Xob Siab

Cov xwm txheej HVDC xav tau kev ua haujlwm siab ntawm lub tshuab hloov pauv cais tawm, suav nrog kev kam rau siab ntawm lub zog hluav taws xob thiab kev tswj hwm arc zoo. Lub DC Isolation Switch ua tiav ob qho kev tshawb fawb kom tau raws li cov kev xav tau no.

Hauv kev kam rau siab voltage siab, lub cim tshiab muaj cov qauv thiab cov khoom siv hloov kho tshiab, hloov kho rau 1500VDC thiab qis dua (thiab siab dua rau cov haujlwm tshwj xeeb). Kev rwb thaiv tsev muaj zog thiab cov neeg sib cuag zoo tiv thaiv kev tawg. Raws li "Cov Qauv Tshwj Xeeb thiab Cov Kev Cai Ntawv Pov Thawj rau DC Isolation Switches rau Photovoltaic Applications", IEC 60947-3 ua raws li cov keyboards ua haujlwm ruaj khov ntawm qhov ntsuas voltage, nrog rau qhov kub ntawm tus neeg xyuas tooj liab nce ≤60K.

Rau kev ua haujlwm tawg, kev siv tshuab hluav taws xob magnetic blow arc-extinguishing thiab multi-point breaking sai sai suppress DC arcs (uas tsis muaj natural zero-crossing). Piv txwv li, ABB Emax series switches ua tiav 1500V DC / 100kA kev tawg kom muaj kev nyab xeeb, zam kev ua yuam kev.

Cov kev hloov kho tshiab no rhuav tshem cov kev txwv ntawm cov kev hloov pauv ib txwm muaj, ua kom muaj kev nyab xeeb ntawm cov haujlwm HVDC.

III. Kev Txhim Kho Kev Ntseeg Siab: Kev Ruaj Ntseg Mus Ntev

Tsis tas li ntawm kev ua tau zoo, DC Isolation Switch tshiab txhim kho kev ntseeg tau, daws teeb meem kev siv lub neej luv luv thiab teeb meem kev saib xyuas siab hauv cov xwm txheej hnyav.

Cov kev sib cuag uas hnav ntau thiab kev sib kis zoo tshaj plaws ua rau lub neej kho tshuab ntev dua 10,000 zaug ua haujlwm, txo kev saib xyuas thiab cov nqi - zoo tagnrho rau cov haujlwm loj PV thiab khaws cia hluav taws xob.

Nrog kev tiv thaiv IP66, nws tiv taus qhov kub thiab txias heev (-40 ℃ txog 85 ℃), av noo thiab ntsev tsuag, ua kom ruaj khov rau kev ua haujlwm sab nraum zoov / kev lag luam.

Nws kuj ua tau raws li IEC 60947-3 thiab GB/T 14048.3 cov qauv, lav kev nyab xeeb thiab kev ua raws cai.

IV. Kev Hloov Kho Tag Nrho Cov Xwm Txheej

Nrog ob qho kev tshawb pom tshiab, DC Isolation Switch tau siv dav hauv cov teb tseem ceeb HVDC: PV cog DC sab (kev cais tawm thaum lub sijhawm txij nkawm), cov txheej txheem khaws cia lub zog (kev cais tawm roj teeb-converter), thiab kev thauj mus los ntawm tsheb ciav hlau / cov khoom siv fais fab DC hauv kev lag luam (kev txiav qhov txhaum).

V. Cov ntaub ntawv siv los ua piv txwv

1. "Cov Qauv Tshwj Xeeb thiab Cov Kev Cai Ntawv Pov Thawj rau DC Isolation Switches rau Photovoltaic Applications" - Tuam Tshoj Lub Koom Haum Kev Lag Luam Khoom Siv Hluav Taws Xob

2. IEC 60947-3 Tus Qauv: Cov khoom siv hloov pauv hluav taws xob tsawg thiab cov khoom siv tswj - Ntu 3

3. Phau Ntawv Qhia Txog Khoom Siv ABB Emax Series DC Isolation Switch

VI. Cov Lus Nug Feem Ntau

Q1: Qhov txawv tseem ceeb ntawm DC thiab AC isolation switches yog dab tsi? A1: DC switches siv cov tshuaj tua hluav taws xob tshwj xeeb (piv txwv li, magnetic blow) rau cov DC arcs uas nyuaj tua; AC switches vam khom AC arc xoom-crossing.

Q2: Nws tuaj yeem hloov kho rau cov theem hluav taws xob twg? A2: 1500VDC thiab qis dua; qee cov khoom txhawb nqa cov theem siab dua rau cov haujlwm tshwj xeeb.

Q3: Yuav ua li cas kom ntseeg tau tias muaj kev ntseeg siab hauv qhov chaw ib puag ncig hnyav? A3: Kev tiv thaiv IP66, cov ntaub ntawv tiv taus corrosion thiab cov qauv zoo tshaj plaws tiv taus cov xwm txheej hnyav.