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 degre), ak idrokarbur total (CH₄+C₂H₆+C₂H₄+C₂H₂) depase 150μl/L (ki endike medyòm- ak gwo tanperati surchof) .
Metòd la twa-rapò (Rogers Metòd kodaj) se zouti nan dyagnostik nwayo, ki reyalize jijman kalite fay pa kalkile twa gwoup yo nan rapò konbinezon kodaj nan CH₄/H₂, C₂h₂/c₂h₄, ak C₂h₄/c₂h₆ {{1} Kòd "1-0-2" klèman endike defo egzeyat wo-enèji . Nan ka konsantrasyon twòp gaz, yon plan tretman etap-pa-etap obligatwa: Sèvi ak ekipman filtraj lwil oliv vakyòm ak yon kapasite pwosesis ki pi gran oswa egal a 5t/h, entèdi kontwole tanperati a lwil oliv nan 60 ± ± 5 degre, dènye a, arebul la, dènye VACU a, dènye vACU a, sevèman kontwòl lwil oliv la nan 60 ± 5 degre, dènye VACU a, aremate a, dènye vACU a, sevèman kontwole tanperati a nan 60 ± 5 degre, arew, ± 5 degre, dènye VACU a, sevère nan 60 ± 5 degre, dènye a, se yon kapasite ki pi gran oswa egal a 5t/h, sèlman kontwole tanperati lwil oliv la nan 60 ± 5 degre, dènye VACU a, dènye VACU a, sevère nan 60 ± 5 degre, ki gen plis valè nan 60 ± 5 degre, dènye vACU a, se sèlman nan 60.<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.
Ekipman retounen nan faktori a pou ekzamine dwe satisfè nenpòt nan kritè sa yo: konsantrasyon asetilèn> 10μl/L oswa idrokarbon total> 300μl/L ak metòd la twa-rapò dyagnostik egzeyat segondè-enèji (tankou "1-0-2" Kòd); Tras egzeyat entèn yo te jwenn pandan enspeksyon demonte (ka tipik: yo te yon transfòmatè 220kV retounen nan faktori a pou ekzamine akòz konsantrasyon idwojèn rive 800μl/l, ak fay la egzeyat ekran fen te finalman konfime) . 220kV transformateur aplike yon sik enspeksyon demi-ane, ak ekipman 110kV aplike yon sik enspeksyon anyèl; Konsantre sou ranfòse antretyen nan sistèm nan sele Zòrye lwil oliv (ka a nan estasyon énergie Liyuan konfime ke echèk sele te kòz prensipal la nan gaz depase estanda a) .
The partial discharge detection technology system covers two matrices: electrical measurement method and non-electrical measurement method: electrical measurement method includes pulse current method (IEC 60270 standard, 10pC-level sensitivity detection is achieved through Rogowski coil), ultra-high frequency detection method (UHF, deploying sensors in the flange gap of the box to capture 300MHz -3 GHz onn elektwomayetik), pasajè metòd vòltaj latè (TeV, detekte nanosekond vòltaj pulsasyon sou miray la deyò nan bwat la); Metòd Mezi ki pa Peye-elektrik gen ladan metòd pwezante ultrasons (40-200 KHz Capteur etalaj pou reyalize ± 10cm-nivo diferans tan pozisyon), metòd mezi optik (bati-an Capteur fib optik pran egzeyat radyasyon limyè), metòd deteksyon chimik (lye ak lwil oliv kromatografi, lè H₂＞ 150 risk) .
Entelijan Teknoloji Dyagnostik gen ladan milti-sous enfòmasyon fizyon, aplikasyon pou aprann gwo twou san fon ak sistèm dijital jimo: yon estasyon 750kV avèk siksè idantifye 0 . 5mm-nivo mikwo-espas egzeyat andedan bag la nan UHF+ultrason+lwil oliv kwomatografi siveyans; Modèl la aprantisaj gwo twou san fon ki baze sou rezo a Resnet reyalize yon presizyon egzeyat modèl presizyon nan 96%; Sistèm dijital jimo a konstwi yon modèl kouti elektwomayetik-tèmik-mekanik-mekanik pou reyalize prediksyon dinamik nan pwosesis devlopman egzeyat . nan yon egzanp aplikasyon nan yon estasyon konvètisè nan Sid Power Grid la nan 2023, lwil oliv ki gen 2 an. Siyal egzeyat tipik . Pozisyon Ultrasons avèk presizyon fèmen pwen fay la nan baz la bag b-faz . enspeksyon demonte konfime ke detachman nan boulon an bag nòt ki te lakòz egzeyat sispann. Apre reparasyon, yo te egzeyat la nan ekipman an siyifikativman redwi soti nan 3500pc 15pc.
Konklizyon rechèch la fè remake ke modèn transfòmatè dyagnostik fay ta dwe bati yon sistèm siveyans ki genyen twa dimansyon nan "lwil oliv kwomatografi premye tès depistaj-multi-teknoloji pozisyon-intelligent Evalyasyon" . ki baze sou lwil oliv Kromatografi Analiz kòm yon metòd siveyans debaz, konbine ak uhf/ultrason pwezante teknoloji, Ofri Ofria. Devlopman nan lavni ta dwe konsantre sou konstriksyon an nan sistèm jimo dijital makonnen ak plizyè jaden fizik, ak complète amelyore nivo a entelijan nan operasyon pouvwa kadriyaj ak antretyen nan evalyasyon estati izolasyon dinamik ak prediksyon lavi .