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Lithaba tse amanang le khase ho li-bradformers

Jun 17, 2025

Siea molaetsa

 

Litaba
  1. Lithaba tse amanang le khase ho li-bradformers
  2. 1. Selelekela
  3. 2.CONSTUR
  4. 3. Molao-motheo oa Sebetsa
  5. 4. Ka melemo le mathata
  6. 5. Tlhahlobo ea ho fetoloa ha seriti e sa sebetseng hantle ke Relay ea khase
    1. 5.1 Mefuta ea Phokotso ea Def ea Defaurs
    2. Mekhoa ea Boikutlo
    3. Litefiso tsa linyeoe tse 5.3
    4. Litlhahiso tsa Tlhahlobo ea 5.4
Lithaba tse amanang le khase ho li-bradformers
 

gas relay

1. Selelekela

 

TheKhase ea Khase(hape e tsejoang e leBuchholz Remix) Ke sesebelisoa se hlohlelletsa ho oli-}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Ha thibelo ea kahare {{liccing, kapa li hlahisa likhase tse hlahang, methane, acemplene). Lihalale tsa khase li khetha ho bokelloa ha likhase tsena kapa lilakane tsa oli tsa metsi ka tšohanyetso, litloholo tsa alarms kapa litlokotsebe tse tsosang takatso ho thibela liphoso tsa bohloko.

2.CONSTUR

1.Lolugh 3.weight (float) 4Sud "Selemo 12.Phallo e ka holimo ea 13.e tsamaisang la 14.Probe 15.Emisa sekoti

gas relay diagram

 

3. Molao-motheo oa Sebetsa

Hangata e lula e kenngoa ka har'a phala e hokahanyang tanka ea Transformer le mohlahlobi. E sebetsa e ipapisitse le mekhoa e 'meli:

.

  • SLOW {{0 0}}
  • Ha molumo oa khase o fihla monyako oa prestio (hangata250-300 ml), float e theoha, ho kenya letsoho ho ikopanya ("temoso e bobebe".

(2) phaello e kholo ea lefeela (leeto la phallo ea oli)

  • Phoso e matla (mohlala, lipotoloho e khuts'oane, li lahloa)
  • Ho phalla ha oli ho leleka flap ka har'a sebaka seo u ka se khethang ho ikopanya le li-milliseconds.

Buchholz relay

transformer gas relay

 

4. Ka melemo le mathata

Melemo

  • Kutlo e phahameng: E nahana ka liphoso tsa ho anyeha (mohlala, ho shoa ha tsona) pele ba nyoloha.
  • Karabelo e potlakileng: "Leeto la Khase la Hard" le sebetsa ka li-millisecond, ho fokotsa ts'enyeho.
  • Ha ho matla a ka ntle: Moralo oa maiketsetso o etsa bonnete ba ho tšepahala esita le nakong ea ho tima motlakase.
  • Phokotso ea molato: Tlhahlobo ea khase (mohlala,DGA {{0 0}} ‖ Tlhahlobo ea khase) e supa mefuta ea lisaelo kapa e futhumetseng, ho ikatisa, jj.).

Litsietsi

  • Oli {{0 0}} Bahlahisi ba qotsitsoeng feela: Ha e sebetse ho omella {{0 0}}
  • Sentictivity ea Tikoloho: Vibration kapa ho kenya ka mokhoa o sa nepahalang ho ka baka maeto a bohata.
  • Tlhokomelo {{0 0}}: E hloka pente ea nako le nako le ho tiisa tlhahlobo ea tiiso.

5. Tlhahlobo ea ho fetoloa ha seriti e sa sebetseng hantle ke Relay ea khase

5.1 Mefuta ea Phokotso ea Def ea Defaurs

gas relay in transformer

5.1.1 ho tsoa ka tatellano

  • Litšobotsi tsa Fault: Tšimo ea tšimo ea Greece ea Greece e bakang likhaung tse fokolang
  • Moloko oa Khase:

Khase ea mantlha:Hydrogen (H₂, 60-70%)

Khase ea bobeli:Methane (Ch₄)

Letšoao la senotlolo: tlase haholoAcetylene (c₂h₂,<5ppm)

  • Ketso e amanang: Hangata e banya feela aAlamo ea khase e bobebe
  • Boemo ba Kotsi: E itekanetseng (e kanna ea nyoloha haeba e sa phekoloa)

 

5.1.2 Formal Faissal

Tlase -}}}}}}}}}}}

  • Lisosa tse Tloaelehileng: Litaba tsa mantlha tsa core, khokahano e mpe
  • Moloko oa Khase:

Laoloa keMethane (Ch₄)

Ho hlahaEthylene (c₂h₄)

TlaseHydrogen (h₂)

 

High-Temperature Overheating (>700 degree)

  • Lisosa tse Tloaelehileng: Ho itlopa joala ho feta, likotlo tse koetsoeng
  • Moloko oa Khase:

Ea bohlokoaEthylene (c₂h₄)

Ea eketsehaEthane (c₂h₆)

TraceAcetylene (c₂h₂)

  • Ketso e amanang: Nako e telele e mpe e ka bakaLeeto la khase e boima

 

5.1.3 Ho ikatisa (ho phahama ho phahameng {{{{{{}}

  • Litšobotsi tsa Fault: Li-currouts tse khutšoane tse khutšoane, tlala liphoso tsa changer
  • Moloko oa Khase:

PhahamengAcetylene (C₂H₂, typically >50ppm)

E phahamisaHydrogen (H₂)

Likaroloana tsa carbon ka oli

  • Ketso e amanang: Eba le leeto le boima la khase
  • Boemo ba Kotsi: E tšoaeang (e hloka ho koala hang-hang)

 

5.1.4 mongobo Ingress

  • Litšobotsi tsa Fault: Litaba tse feteletseng ka oli
  • Moloko oa Khase:

HaholoHydrogen (H₂, >80%)

NyaneMethane (Ch₄)

  • Ketso e amanang: KhafetsaMabone a bohale
  • Tlhahlobo ea Tlhahlobo: E hloka netefatso kaTeko ea mongobo oa oli

 

Mekhoa ea Boikutlo

Buchholz relay in transformers

Mesebetsi ea khase ea 5.2.1 (karolelano ea Roger)

Likarolo tsa Tekanyetso ea Kena bakeng sa Boitsebiso ba liphoso:

Karolelano

Mefuta

Mofuta oa molato

Ch₄ / H₂

<0.1

Ho tsoa ka bongata

C₂H₄/C₂H₆

>3

Phahameng -}}} ho feta

C₂H₂/C₂H₄

>0.5

Ho Etsahala Phoso

5.2.2 Duval triangle (IEC 60599)

Ho hatela pele tse tharo - Mokhoa oa ho hlahloba litšoantšo ka tatellano e nepahetseng ea tlholeho.

5.2.3 Tlhahlobo ea Rate ea Khase

Tlhokomelo ea tlhokomeloSekhahla sa hydrocarbon sa mofuta oa>0.5 ML / H

Tomoso ea temosoSekhahla sa hydrocarbon sa mofuta oa>1 ml / h

 

Litefiso tsa linyeoe tse 5.3

Winding Short Circuit

Nyeoe ea 1: Changer Changer Changer Mabitso a Khokahano

  • Matšoao: KhafetsaMabone a bohale
  • Tlhahlobo ea Khase:

Ch₄: 45%

           C₂H₄: 30%

           C₂H₂: <1ppm

  • Tlhahlobo ea Tlhahlobo: E mahareng -}}}}}}}}}}}}}}}}
  • Ketso: Hlahloba le ho hlahella ka mokhoa o hlakileng oa ho ba teng

 

Nyeoe ea 2: Likhomphutha -

  • Matšoao: Leeto la khase e boima
  • Tlhahlobo ea Khase:

           H₂: 55%

           C₂H₂: 35%

Likarolo tsa Carbon ka oli

  • Tlhahlobo ea Tlhahlobo: Phahameng {{0 0}} Matlafatso ea Boikarabello
  • Ketso: Etsa tlhahlobo ea moea e kenang

 

Dissolved Gas Analysis test

 

Litlhahiso tsa Tlhahlobo ea 5.4

  1. Sampling ea Kamehla: BoitšoaroTlhahlobo ea khase e qhibilihileng (DGA)bonyane tsohleLikhoeli tse 6.
  2. Ketsahalo e rekiloeng: Rekota likarolo tse mabapi le lithibelo tse lumellanang le litekanyetso tse lumellanang tsa motlakase.
  3. Calibrane e amanang: Selemo le selemo se netefatsa phaello le mekhabiso e matla.
  4. Suppliking ho lekola: Kopanya leLitsamaiso tsa Tlhaselo ea Inthanetengbakeng sa ho ts'epahala.

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