Cov Transformers Faib Khoom: Cov Cheebtsam Tseem Ceeb thiab Cov Ntsiab Cai Ua Haujlwm

Kev Hloov Pauv Hloov Chaws ua haujlwm ua cov hauv paus tseem ceeb hauv cov hluav taws xob niaj hnub, ua kom cov kab hluav taws xob siab (feem ntau 11-33 kV) mus rau cov hluav taws xob siv tau (120-480 V) rau cov neeg siv khoom nyob hauv tsev, lag luam, thiab kev lag luam.

Cov khoom siv hluav taws xob zoo li qub no ua haujlwm los ntawm cov hauv paus ntsiab lus ntawm kev siv hluav taws xob thaum tseem suav nrog cov yam ntxwv engineering siab heev rau kev ntseeg tau thiab kev nyab xeeb.

​1. Kev Ua Haujlwm Mechanics​
Cov txheej txheem hloov pauv hluav taws xob vam khom kev siv hluav taws xob electromagnetic induction ntawm cov windings thawj thiab thib ob. Thaum alternating tam sim no ntws los ntawm lub high-voltage thawj winding, nws tsim cov magnetic flux hloov pauv lub sijhawm hauv lub laminated silicon steel core. Qhov kev sib txuas magnetic no ua rau muaj qhov hluav taws xob sib piv hauv lub secondary winding, txiav txim siab los ntawm qhov tig piv (N₁/N₂) raws li Faraday's Law of Induction.

Kev sib raug zoo ntawm lej tuaj yeem piav qhia tau li no:
V₁/V₂ = N₁/N₂ = k (piv rau qhov tig)
I₁/I₂ = N₂/N₁ (qhov piv tam sim no rov qab rau qhov piv voltage)

​2. Kev Tsim Qauv​
Cov kev siv niaj hnub no muaj cov qauv teeb tsa zoo tshaj plaws:

• ​Kev Sib Dhos CoreCov hlau silicon uas ua los ntawm cov khoom siv laminated grain-oriented txo cov kev poob ntawm eddy current thaum tswj cov permeability ntawm magnetic
• ​Cov Tshuab Txias:

• Cov hom roj-immersed (feem ntau rau kev teeb tsa sab nraum zoov) siv cov roj transformer rau kev tswj thermal thiab dielectric rwb thaiv tsev
• Transformer Hom Qhuavs (haum rau kev siv sab hauv tsev) siv cua txias nrog kev nyab xeeb hluav taws zoo dua
  • ​Cov Txheej Txheem Tiv ThaivCov cuab yeej tiv thaiv hluav taws xob, cov khoom siv thermal relays, thiab cov twj tso kua mis siab ua kom muaj kev nyab xeeb rau kev ua haujlwm tiv thaiv cov hluav taws xob ntau dhau thiab cov kev ntxhov siab ib puag ncig

​3. Cov yam ntxwv ntawm kev ua tau zoo​

• ​Kev Ua Haujlwm ZooUa tiav 95-99% kev ua haujlwm zoo nyob rau hauv qhov zoo tshaj plaws loading mob los ntawm kev txo qis core losses (hysteresis thiab eddy currents)
• ​Cov Kev Xaiv Peev XwmMuaj cov qauv ntawm 50 kVA txog 25,000 kVA, nrog rau cov qauv me me uas ua rau tuaj yeem teeb tsa rau ntawm ncej lossis ntawm lub ncoo.
• ​Kev Tswj Xyuas Hluav Taws Xob: Kev siv tshuab OLTC (On-Load Tap Changer) siab heev ua rau muaj kev tswj hwm hluav taws xob ± 10% yam tsis muaj kev cuam tshuam kev pabcuam

​4. Kev Tsim Kho Tshiab Txog Kev Nyab Xeeb​
Cov chav tsev niaj hnub no muaj ntau txheej tiv thaiv:

• Kev tiv thaiv overload los ntawm thermal imaging thiab winding kub sensors
• Kev txwv tam sim ntawd ntawm lub voj voog luv luv siv cov fuses txwv tam sim no
• Kev tiv thaiv kev nce siab ntawm cov hlau-oxide varistors (MOVs) thiab cov windings tiv thaiv

​5. Kev Xav Txog Kev Txij Nkawm​
Txawm hais tias xav tau kev saib xyuas tsawg kawg nkaus piv rau cov tshuab uas tig mus los, kev tshuaj xyuas tsis tu ncua tsom mus rau:

• Kev kuaj lub zog dielectric ntawm cov roj rwb thaiv tsev (rau cov hom roj-immersed)
• Kev saib xyuas ib feem ntawm cov hluav taws xob siab
• Kev ntsuam xyuas qhov xwm txheej ntawm Bushing siv infrared thermography

Cov kev daws teeb meem no ua piv txwv txog kev sib xyaw ua ke ntawm cov ntsiab cai electromagnetic classical nrog cov khoom siv hluav taws xob niaj hnub, ua kom muaj kev faib hluav taws xob zoo thiab txhim khu kev qha thoob plaws ntau yam grid architectures. Rau cov ntawv thov tshwj xeeb xws li kev sib koom ua ke ntawm lub zog rov ua dua tshiab lossis cov tshuab smart grid, cov qauv tsim siab heev uas suav nrog cov hlau amorphous cores ntxiv txhim kho kev ua tau zoo los ntawm kev poob qis heev uas tsis muaj kev thauj khoom.