xya lub ntsiab gases hauv DGA yog dab tsi, thiab hom kev ua tsis tiav lawv ua li cas?
DGA saib xya lub ntsiab gases yaj hauv cov roj transformer. Txhua lub roj muaj feem xyuam nrog rau qib zog tshwj xeeb thiab hom kev ua txhaum.
|
Roj |
Formula |
Lub zog pib |
Associated Fault Type |
|
Hydrogen |
H₂ |
Tsawg / Nruab Nrab |
Ib nrab tso tawm (corona), electrolysis, xeb |
|
Methane |
CH ₄ |
Tsawg |
Sparking / low{0}}zog arcing |
|
Ethane |
C₂H₆ |
Tsawg |
Thermal roj degradation (< 300°C) |
|
Ethylene |
C₂H₄ |
Siab |
Kub qhov chaw (300℃-700 degree) - winding overheating |
|
Acetylene |
C₂H₂ |
Siab heev |
Arcing (>700℃) - cov pa phem tshaj plaws |
|
CO |
CO |
Nruab nrab |
Cellulose (paper) thermal degradation (>200 degree) |
|
CO₂ |
CO₂ |
Tsawg |
Ib txwm cellulose laus (siv CO₂ / CO piv) |
Kev sib raug zoo tseem ceeb:
• H₂ ib leeg lossis H₂ + CH₄ → Ib nrab tso tawm (corona).
• C₂H₂ → Arcing. Txawm tias tus lej (Ntau dua lossis sib npaug li 1–5 ppm) yuav tsum tau ua tam sim.
• C₂H₄ dominant → High-kub thermal fault (overheated windings).
• CO₂/CO> 10 → Kev laus li qub; CO₂/CO <3 → Active thermal txhaum hauv ntawv.
Cov qib roj av hauv qab:
• Tag nrho cov transformers muaj qee cov roj tom qab los ntawm kev ua haujlwm ib txwm muaj.
• Trending yog ib qho tseem ceeb tshaj ib qho nqi kiag li.
• Ib qho 20% nce txhua hli xav tau kev saib xyuas txawm tias qhov tseem ceeb tshaj plaws nyob rau hauv qab lub tswb.
Gas ntau lawm vs. txhaum zog:
Tsawg zog → H₂ → CH₄ → C₂H₆ → C₂H₄ → C₂H₂ ← Lub zog muaj zog
(PD) (tshav kub) (arcing)