Lub hauv paus rau phau ntawv
VLF Cable Kev Kuaj yog tus qauv kub rau kev kuaj nruab nrab {{0} {{voltage dundital Street. Tsis zoo li cov dc kev sim {{3} Tam sim no ntau dhau los vim 0.1 hz}} Wb tawgYuav ua li cas qhov tseem ceeb tshaj plaws thev naus laus zis zais zais cable ua txhaum.
Lub cev me me tshuab: simulating muaj kev ntxhov siab tiag tiag
VLF siv lub rooj sib cav sib dhos ACT Voltage ntawm Ultra -} low zaus (0.01-0.1 hz) rau cables. Vim li cas qhov no?
Electro - cua sov kev ntxhov siab mimicry: Ntawm 0.1 Hz, VLF txawv dua cov thermal thiab hluav taws xob kev ntxhov siab cables ntsej muag ntawm 50/60 hz.
Chaw nqi tsubDC testinging tsim chaw tsim kev puas tsuaj rau hauv rwb thaiv tsev. VLF thim rov qab polarity tas li, tiv thaiv kev tswj hwm tus neeg tsim.
Kev Tshem Tawm Ib Leeg: Cov pob hluav taws xob tsis muaj zog emit pd tsom iav thaum lub voj voog volling, pinpointing decradation (piv txwv li cov ntoo dej hauv xlpe).
Cov Ntsiab Lus Tseem Ceeb: Lub Tebchaws 0.1 Hz zaus tsoo ib qho "qab zib" {{-}}}}}}}
Vim li cas VLF> DC Kev Ntsuam Xyuas: 3 Qhov Tseem Ceeb
Kev Ntsuas Puas:
DC kev kuajpib khiavRwb thaiv tsev laus. VLF qhia tawm qhov tsis xws luagtsis muajcollateral puas tsuaj.
Cov ntaub ntawv: Lub chaw tso hluav taws xob hloov txhua qhov DC testers nrog VLF tom qab tshaj tawm - DC qhov kev sim ua tsis tau nyob rau hauv cov neeg ua haujlwm hauv pawg.
Teb - Tus phooj ywg muaj zog:
VLF pab kiag li lawm yuav tsum tau 1/500 lub zog ntawm 50 HZ AC Testers.
Testing 35 kv cables xav tau tsuas yog ib chav tsim hluav taws xob me me lossis roj teeb roj teeb.
Quantifiable Pass / swb Messrics:
Cables "Dhau" yog tias lawv txuag tau 3 × (ntsuas voltage) rau 15-60 feeb.
Ua tsis tiav tshwm sim rau kev cuam tshuam sai lossis PDH qhov tseem ceeb tshaj plaws.
Raug VLF sim cov txheej txheem hauv kev xyaum
Kev sib txua: Ob peb VLF chav nyob rau cov theem ntxiv ntawm HV Bushings.
Voltage ramp -}: Maj mam nce voltage rau 2-3.5 × u₀.
Soak Time: Tswj voltage (feem ntau 15-60 mins).
Xyuas: Taug qab TAN δ (dissipation qhov sib txawv) thiab ib feem tawm kev tawm tsam.
Yam ntsuas xyuas: Rwb thaiv tsev kev sib koom ua ke yog qhov tseeb yog tias to taub dej khov nyob ruaj khov.
Pro tswv yim: Tan Δ qib 5% qhia txog cov dej noo ntau lossis kev laus- Nrhiav kev hloov.
Daim ntawv thov sab saum toj rau VLF kuaj
Commissioning tshiab 6-35 kV extruded clesles tom qab kev teeb tsa
Kev kuaj mob sib txuas ua ke hauv kev ua yeeb ncuab cua ua liaj ua teb cov cabresine cabrarine cable
Life extension assessments for oil-filled cables >30 xyoo
Kev kho kho tau tom qab xob laim kev puas tsuaj lossis kev khawb yuam kev
Kev Lag Luam Tseem Ceeb Sau:Cov nqi hluav taws xob hauv Is Nrias teb tau ua kom tau txais kev kuaj tom qab DC kev sim ua rau Cable tawg ntawm cov ntug hiav txwv. Teb chaws Europe's IEC 60502 Tam sim no txwv DC kev sim rau tus ntoo khaub lig-} txuas Polyethylene (XLPE) cable.
Tseem Ceeb Takaway: Vlf tsis yog "lwm qhov kev sim siab" {- nws yog tustsuasnon-destructive method that mirrors real operating stresses while detecting both immediate failures and developing degradation. Nrog cov tuam ntxhab loj muab sib dua (<50 kg) devices and AI-integrated monitoring, VLF remains indispensable for grid reliability.
