Kev piav qhia
Lub hauv paus ntawm qhov sib txawv no yog nyob rau hauv cov rwb thaiv tsev theem ntawm lub transformer qhov nruab nrab point.
I. Tag nrho Insulated Transformer
1. Kev txhais
Lub tshuab hluav taws xob tag nrho, tseem hu ua "tsis yog- qib rwb thaiv tsev transformer," yog ib qho uas qhov nruab nrab ntawm qhov cua thiab cov kab terminals muaj tib theem rwb thaiv tsev. Hauv lwm lo lus, qhov nruab nrab taw tes thiab peb - theem kab terminals (theem A, B, thiab C) yog tsim los tiv taus tib theem ntawm xob laim impulse voltage thiab lub zog zaus tiv taus voltage.
2. Cov yam ntxwv tseem ceeb
Uniform Insulation Level: Lub zog rwb thaiv tsev yog tib yam txawm tias nws yog thaum pib ntawm winding (kab terminals) los yog qhov kawg (qhov nruab nrab point).
Flexible Neutral Point Operation: Qhov nruab nrab taw tes tuaj yeem ncaj qha hauv av, hauv av los ntawm Petersen coil, lossis txawm tias tsis muaj av. Nws cov rwb thaiv tsev muaj zog txaus tias txawm tias qhov nruab nrab ntawm qhov nruab nrab tsis yog hauv av, ib qho kev txhaum - theem yuav tsis ua rau muaj kev puas tsuaj rau lub rwb thaiv tsev txawm tias qhov nce hauv qhov nruab nrab ntawm qhov muaj peev xwm.
Kev tiv thaiv overvoltage: Feem ntau tso siab rau cov neeg ntes kom txwv cov khoom siv hluav taws xob overvoltages.
3. Daim Ntawv Thov Tseem Ceeb Scenarios
Daim ntawv thov tseem ceeb yog nyob rau theem voltage ntawm 110kV thiab hauv qab no.
Nws yog feem ntau siv nyob rau hauv cov tshuab uas qhov nruab nrab taw tes yog ungrounded los yog grounded los ntawm ib tug Petersen coil (piv txwv li, low-tam sim no grounded systems), uas yog heev heev nyob rau hauv 10kV-35kV tis tes hauj lwm thiab muaj peev xwm txhim kho lub hwj chim mov kev ntseeg.
II. Ib nrab Insulated Transformers (Graded rwb thaiv tsev Transformers)
1. Kev txhais
Ib feem insulated transformer, raug hu ua "qib rwb thaiv tsev transformer," yog ib qho ntawm cov rwb thaiv tsev ntawm cov cua qhov nruab nrab ntawm qhov nruab nrab qis dua li ntawm cov kab terminals. Cov qib rwb thaiv tsev txo qis ib kauj ruam los ntawm cov kab terminals mus rau qhov nruab nrab.
2. Cov yam ntxwv tseem ceeb
- Cov qib rwb thaiv tsev tsis sib xws: Cov txheej txheem rwb thaiv tsev yog siab tshaj ntawm cov kab terminals thiab qis tshaj ntawm qhov nruab nrab. Piv txwv li, nyob rau hauv ib tug 500 kV transformer, lub rwb thaiv tsev theem ntawm nruab nrab taw tes tej zaum yuav sib npaug ntawm 110 kV los yog 66 kV transformer.
- Lub ntsiab lus nruab nrab yuav tsum ncaj qha hauv av: Qhov no yog nws qhov tseem ceeb tshaj plaws kev ua haujlwm. Txij li thaum lub ntsiab lus nruab nrab muaj cov rwb thaiv tsev tsis muaj zog, yog tias nws tsis ruaj ntseg hauv av thaum lub sijhawm ua haujlwm, qhov hluav taws xob siab tuaj yeem txhim kho ntawm qhov nruab nrab thaum muaj kev cuam tshuam los yog xob laim, yooj yim rhuav tshem nws cov rwb thaiv tsev tsis yooj yim thiab ua rau lub cev puas tsuaj.
- Kev lag luam siab: Qhov no yog lub hom phiaj tseem ceeb ntawm kev siv cov rwb thaiv tsev zoo. Los ntawm kev txo cov rwb thaiv tsev ntawm qhov nruab nrab, qhov hloov pauv qhov loj tuaj yeem txo qis, qhov hnyav txo, thiab kev siv cov khoom siv (tshwj xeeb yog cov ntaub ntawv rwb thaiv tsev) txo qis, yog li txo cov nqi. Hauv ultra-high voltage thiab ntxiv- high voltage applications, qhov txiaj ntsig kev lag luam no tseem ceeb heev.
3. Cov ntawv thov tseem ceeb
- Feem ntau siv nyob rau hauv ultra- high voltage thiab ntxiv - high voltage fais fab mov ntawm 110 kV (tshwj xeeb tshaj yog 220 kV) thiab siab dua.
- Tsuas yog siv tau rau hauv siab -tam sim no grounded systems uas qhov nruab nrab point yog ncaj qha grounded.
Txheej txheem cej luam
- Tsis txhob yuam kev: Tsis muaj ib qho xwm txheej twg yuav tsum muaj qhov nruab nrab ntawm chav kawm -insulated transformer yuav tsum tau tso tseg tsis muaj av los yog hauv av los ntawm ib qho arc suppression coil. Qhov no yog qhov txaus ntshai heev thiab tuaj yeem ncaj qha ua rau kev puas tsuaj ntawm cov rwb thaiv tsev thiab kev puas tsuaj rau lub tshuab hluav taws xob.
- Kev xaiv hauv paus: Kev xaiv ntawm hom transformer tsis yog txiav txim siab los ntawm tus neeg siv; nws yog txiav txim los ntawm qhov system- theem tsim xws li qib voltage ntawm daim phiaj hluav taws xob thiab txoj hauv kev nruab nrab ntawm qhov av. Feem ntau, tag nrho-insulated transformers yog siv rau qis-voltage tis systems, thaum chav kawm-insulated transformers yog siv rau high-voltage kis systems.
- Kev Ua Haujlwm Saib Xyuas: Thaum ua haujlwm, tshuaj xyuas, lossis tswj lub tshuab hloov pauv, nws yog ib qho tseem ceeb kom paub meej txog lub tshuab hluav taws xob rwb thaiv tsev, tshwj xeeb tshaj yog cov rwb thaiv tsev ntawm qhov nruab nrab ntawm qhov taw tes, kom muaj kev nyab xeeb ntawm kev ua haujlwm.
