Dab tsi yog inrush tam sim no hauv transformers, thiab dab tsi ua rau nws?

1. Dab tsi yog inrush tam sim no?
Inrush tam sim no, tseem hu ua magnetizing inrush, yog hais txog lub caij nyoog siab ntawm tam sim no uas tshwm sim nyob rau hauv lub transformer thawj winding ntawm lub tam sim no transformer yog energized tsis muaj load (uas yog, thaum ib tug winding txuas nrog lub hwj chim qhov chaw thiab lwm winding yog qhib). Qhov tam sim no peaks siab heev pib tab sis decays sai heev.
Qhov loj ntawm qhov tam sim no ntau dua li qhov hloov pauv tam sim no, qee zaum ncav cuag 5 txog 15 npaug ntawm qhov ntsuas tam sim no (rau cov hloov pauv loj, nws tuaj yeem ncav cuag li 20 npaug). Txawm li cas los xij, nws lub sijhawm luv luv, feem ntau ploj mus rau qhov qub tsis muaj -load tam sim no (feem ntau tsuas yog 0.5% mus rau 2% ntawm qhov ntsuas tam sim no) hauv kaum rau pua milliseconds.
Hauv cov ntsiab lus yooj yim, nws zoo li dheev qhib lub qhov dej ntawm lub pas dej loj loj: thaum xub thawj, muaj dej ntws loj heev, tab sis nws sai sai. Lub inrush tam sim no yog qhov 'surge ntawm dej loj heev.'

2. Dab tsi ua rau inrush tam sim no?
Qhov laj thawj tseem ceeb ntawm inrush tam sim no muaj kev sib cuam tshuam ntawm ob yam tseem ceeb:

• - Sib nqus saturation ntawm transformer core
• - randomness ntawm lub sijhawm hloov (voltage theem)

3. Cov yam ntxwv tseem ceeb ntawm Inrush tam sim no

• - Qhov loj heev: tuaj yeem ncav cuag 5-15 npaug ntawm qhov ntsuas tam sim no.
• - Muaj ntau yam uas tsis yog- lub sijhawm (DC) cov khoom sib xyaw ua ke thiab ntau dua harmonics: Lub waveform deviates loj heev los ntawm sine yoj, skewed mus rau lub sij hawm axis, nrog cov ntsiab lus siab ntawm qhov thib ob harmonics. Cov yam ntxwv no feem ntau yog siv los tiv thaiv relay kom paub qhov txawv ntawm inrush tam sim no thiab tam sim no txhaum.
• - Kev lwj sai sai: Vim muaj qhov tsis kam nyob rau hauv cov windings, cov khoom siv DC hloov mus rau exponentially. Inrush tam sim no feem ntau decays nyob rau hauv 0.1-0.5 vib nas this. Qhov loj dua lub peev xwm transformer, lub sij hawm lwj yuav ntev dua.
• - Tsis paub meej: Qhov loj ntawm inrush tam sim no nyob ntawm theem voltage thiab seem hlau nplaum ntawm cov tub ntxhais thaum lub sijhawm kaw, ob qho tib si yog random. Yog li ntawd, qhov loj thiab waveform ntawm inrush tam sim no tuaj yeem sib txawv nrog txhua qhov kaw.

4. Qhov cuam tshuam ntawm Inrush tam sim no thiab kev tiv thaiv
Cov teebmeem:

• - Tej zaum yuav ua rau kev ua haujlwm tsis raug ntawm kev tiv thaiv kev sib txawv ntawm qhov sib txawv lossis kev tiv thaiv overcurrent, ua rau kaw tsis ua haujlwm.
• - Tsim kom muaj zog electrodynamic loj, uas yuav deform los yog puas lub windings.
• - Ua rau muaj hluav taws xob poob hauv daim phiaj hluav taws xob, cuam tshuam rau kev ua haujlwm ntawm lwm yam khoom siv ntawm tib lub npav.

Kev tiv thaiv:
- Relay lees paub thev naus laus zis: Siv cov yam ntxwv uas cuam tshuam tam sim no muaj ntau qhov kev sib haum xeeb thib ob, 'kev sib haum xeeb thib ob' tuaj yeem teeb tsa hauv kev tiv thaiv sib txawv los tiv thaiv kev mus ncig tsis raug.
- Tswj lub sijhawm kaw (synchronized switching thev naus laus zis): Los ntawm kev kaw qhov hloov pauv ntawm qhov hluav taws xob siab tshaj plaws nrog kev hloov pauv ntse, qhov pib khov kho- lub xeev flux yog xoom, uas tuaj yeem txo qis tam sim no.
- Kaw nrog series kuj: Ua ntej, txuas lub Circuit Court los ntawm ib tug resistor kom txwv tsis pub cov inrush tam sim no, ces luv luv - Circuit Court resistor nrog ib tug breaker.

Transformer inrush tam sim no tshwm sim thaum lub voj voog raug kaw ntawm lub sijhawm tsis zoo, xws li ntawm qhov hluav taws xob xoom- hla qhov taw tes, ua ke nrog cov hlau nplaum seem nyob hauv cov tub ntxhais, ua rau muaj qhov sib nqus sib nqus flux nyob deb tshaj li tus nqi ib txwm, ua rau qhov sib sib zog nqus saturation ntawm cov tub ntxhais thiab tsim ib qho tam sim no loj tam sim no. Nws yog ib qho kev hloov pauv hauv hluav taws xob tam sim no ntawm lub transformer, tsis yog txhaum.