As the core means of transformer insulation status monitoring, oil dissolved gas chromatography analysis technology can achieve early warning of latent faults inside the equipment by accurately detecting the concentration changes of dissolved gas components in oil samples. This technology is based on the principle of gas chromatography separation. The implementation process includes: after extracting oil samples from the transformer body, degassing of dissolved gases is completed in a high vacuum environment, and quantitative analysis of each component is performed by the detector after separation by chromatographic column. According to GB/T 7252-2001 "Guidelines for Analysis and Judgment of Dissolved Gases in Transformer Oil", transformers with voltage levels of 220kV and below need to implement a periodic monitoring system, among which the key characteristic gas judgment thresholds are: hydrogen (H₂) reaches 150μL/L (may indicate low-energy discharge or electrolysis of water in oil), acetylene (C₂H₂) exceeds 5μL/L (a trace amount can represent high-temperature arc discharge of >800 Qib), thiab tag nrho cov hydrocarbons (CHU tag nrho hydh₆ + c₂h₄ + c₂h₂) ntau dua 150μl / l (qhia qhov nruab nrab - thiab kub overheating faults) .
Peb-piv cov qauv (Rogers Coding Txuj Ci) yog cov qauv kev txiav txim siab suav nrog kev sib txuas ua ke nrog kev sib txuas nrog: "}}} "{{{{}}" Qhia meej txog cov peev txheej ntawm ntau dua lossis muaj peev xwm tswj cov roj ntau dua li ntawm cov roj hauv 60 ± 5 degree, lub tshuab nqus tsev kawg<133Pa, and continue purification for ≥48 hours. Practice shows that after 48 hours of vacuum degassing treatment, the acetylene content of a 110kV transformer dropped from the excessive value to the qualified range. The supporting unidirectional circulation process (transformer → oil storage tank → oil filter → transformer) can construct a closed-loop purification path to achieve deep removal of dissolved gases. After the treatment is completed, it needs to be left to stand for 24 hours for retesting, and partial discharge test and insulation resistance test should be carried out simultaneously for double verification.
Cov cuab yeej xa rov qab rau lub Hoobkas rau kev overhaul yuav tsum tau ua raws li cov qauv hauv qab no: Kev kuaj mob hauv qab no (xws li "{{4"} "code); Sab hauv kev tshem tawm pom thaum lub sij hawm disassembly (} 220kv transformers siv lub xyoo kuaj ib nrab xyoo, thiab 110KV cov cuab yeej siv txoj kev kuaj xyuas txhua xyoo; Tsom rau ntxiv dag zog rau kev saib xyuas ntawm cov roj hauv ncoo sealing system (cov ntaub ntawv ntawm sealing ua tsis tau yog lub ntsiab ua tsis tau ntawm cov qauv) {{}
Kev tso hluav taws xob ib nrab npog ob leeg: Txoj Kev Ntsuas Hluav Taws Xob Cov Qauv Siv Hluav Taws Xob (UHF Electromagnetic vuag), Chanient lub ntiaj teb voltage txujci (tev, ntes Nanosecond voltage pulses ntawm phab ntsa sab nraud ntawm lub thawv); Cov kev ntsuas tsis yog-hluav taws xob suav nrog kev ntsuas ultrasonic (txuas nrog cov roj chromatography, thaum muaj kev ntsuas tshuaj lom neeg), nws qhia txog kev ntsuas tshuaj lom neeg), nws qhia txog kev tawm tsam kev phom sij (
Cov kws tshaj lij thev naus laus zis thev naus laus zis thiab cov kev kawm sib sib zog nqus thiab hloov pauv mus ntxiv rau hauv kev ua tiav rau hauv kev ua tiav 0}} Tus qauv kawm sib sib zog ua raws li lub sijhawm pib ua tiav txoj kev tawm paug tawm ntawm 96%; Cov kev ntsuas cov cuab yeej hluav taws xob uas muaj kev phom sij ntawm cov txheej txheem kev hloov pauv ntawm cov txheej txheem kev hloov pauv ntawm cov txheej txheem kev hloov pauv ntawm cov txheej txheem kev hloov pauv ntawm cov txheej txheem kev hloov pauv ntawm cov txheej txheem kev hloov pauv ntawm cov txheej txheem kev hloov kho hauv lub nroog. Cov paib tawm suab nrov.} ultrasonic tso pov tseg yog muab xauv qhov tseeb ntawm B-Pease Bush Bush tau paub tseeb tias qhov xoob ntawm lub nplhaib thaum lub nplhaib tawg. Tom qab kho, qhov paug ntawm cov khoom siv tau txo qis los ntawm 3500pc txog 15pc.
Kev tshawb fawb xaus tau hais tias yog kev ntsuas cov tshuaj ntsuam xyuas uas yog kev soj ntsuam cov cuab yeej chromatography-ultrasonic 5}} Kev tshawb fawb tam sim no yuav tsum ua tiav kev txhim kho ntawm kev tsim kho ntawm digital ntxaib ke txuas nrog ntau lub cev lub cev, thiab kev nyiam ua cov khoom ntse ntawm kev ntsuas kev ntse ntawm kev sib tw ntawm kev ntsuas cov teeb meem ntawm kev sib tw thiab lub neej kev twv ua ntej.