Kev ntsuam xyuas ua ntej rau kev hloov pauv
Tus Qauv Ua Raws Cai: GB 50150, IEC 60076, thiab cov lus qhia kev lag luam.
I. Cov kev sim ua ib txwm
Kuv. Rwb thaiv tsev kev ua haujlwm
1. Rwb thaiv tsev tsis kam & nqus cov piv
- Kev ntsuas: 2500v Meohmeter rau windings-rau-av rwb thaiv tsev.
- PAS CRITERIA:
- Tsawg kawg 1000mω (Transformers tsawg dua lossis sib npaug rau 35kv ntawm 20 degree).
- Kev suav RELFease (R60s / R15s) ntau dua lossis sib npaug rau 1.3.
2. Dielectric Poob Tangent (Tanδ)
- txwv:
- Cov roj-raus: tsawg dua lossis sib npaug rau 0. 5% ntawm 20 degree.
- Qhuav-hom: tsawg dua los yog sib npaug rau 1. 0}% ntawm 20 degree.
- Failure mode: >7% nce rau ib 10 degree kub nce qhia ya raws.
3.. Lub zog zaus tiv xyuas
- Cov qib voltage: raws li ib GB 1094.3 (piv txwv li, 35kv / 1min rau 10kV windings).
- Cov kauj ruam tseem ceeb: sim cov roj-immersed units tom qab ntau dua lossis sib npaug rau 72h roj ruaj khov.
ii. Winding cov yam ntxwv
4. DC winding Kuj
- Kev zam lub chaw:
- Tsawg dua lossis sib npaug rau 2% theem sib txawv (ntau dua lossis sib npaug rau 1600kva).
- Tsawg dua lossis sib npaug rau 4% theem sib txawv (<1600kVA).
- Cov ntaub ntawv tiag tiag: 5.8% sib txawv hauv 110kv chav qhia oxidized coj mus ntsib.
5. Voltage piv & Vector Group
- Cov Yuav Tsum Tau:
- {0. 5% yuam kev ntawm tus kais rated.
- ± 1% yuam kev ntawm lwm cov kais dej.
- Cov cuab yeej siv tau: Theem Meter rau vector pawg (piv txwv li, dyn11).
III. Tub Ntxhais & Grounding
6. Cov rwb thaiv tsev tseem ceeb tsis kam
- Thaum pib: muaj ntau dua lossis sib npaug rau 100mω (2500v megohmermeter).
- Liab chij:<10MΩ suggests damaged core insulation.
7. Ntau-taw tes kos duab
- Txuj ci: clamp metre ntsuas ntawm av tam sim no.
- NIGN ZOO:<100mA.
Ii. Cov kev ntsuam xyuas tshwj xeeb
Kuv. Cov roj-cov roj tso tawm
8. Roj Kev Ntsuam Xyuas Kev Ntsuam Xyuas
- Cov tsis tseem ceeb:
- Txiaj liab voltage: ntau dua los yog sib npaug rau 40kv (tshiab) / ntau dua los yog sib luag rau 30kv (siv).
- noo noo: tsawg dua los yog sib npaug rau 20ppm (ntau dua los yog sib npaug rau 330kv) / Tsawg dua lossis sib npaug lossis sib npaug rau 220kv).
- Dielectric poob: tsawg dua los yog sib npaug rau 0. 5% ntawm 90 degree (roj tshiab).
- Cov khoom siv: cov roj twj paj nruag roj, Karl Fischer SCRator.
9. Kev ntsuam xyuas kev sib ceeb
- {{{{0. 03mpa rau 24h (tsawg dua lossis sib npaug).
- Lub tshuab nqus tsev: 133pa rau 8h (tsawg dua los yog sib npaug rau 67pa / h sawv).
ii. Kev Ua Tau Zoo
10. Tsis muaj-thauj cov yam ntxwv
- Muaj kev cia siab txawv:
- Poob: tsawg dua los yog sib npaug rau +15}}} vs Hoobkas cov ntaub ntawv.
- Tam sim no: tsawg dua lossis sib npaug rau +30}}} vs Hoobkas cov ntaub ntawv.
- Hauv paus ua piv txwv: unanneed tub ntxhais Lamination tshwm sim 42% ntau dhau.
11. Luv-Circuit Court
- Kev zam txim ntau:
- Cuam tshuam: tsawg dua los yog sib npaug ± 10% sib txawv.
- Thauj khoom poob: tsawg dua lossis sib npaug rau +10% (ntsuas kub-hloov).
III. Kev Tiv Thaiv Cov Tshuab
12. Buchholz Relay Kev Tshawb Xyuas
- Kev ua haujlwm Harbors:
- Tswb: {250-300 cm³ ntxiv.
- Ncig Tebchaws: Ntau dua lossis sib npaug rau 1. 0 m / s roj ntws nrawm.
13. Kev ntsuas kev ntsuas lub ntsuas hluav taws xob
- Cov chaw teeb tsa:
- Ua kom muaj: 55kpa ± 5kpa.
- Rov qab: ntau dua los yog sib npaug rau 80% ua kom lub siab siab.
III. Xeem theem
- Ua ntej-Installation: Cov Kev Ntsuas Cov Roj, Cov Ntawv Cim Ntim (GB / T 6451).
- Kev-Soj Ntsuam Xyuas: Rwb thaiv tsev / DC kuj, cov kev ntsuam xyuas piv (DL / T 596).
- Kev ua si ua ntej - withstand voltage, ib nrab tawm, kev tiv thaiv kev tiv thaiv (i {2}}).
IV. Cov qauv tsis ua tiav
- Partial Discharge (>100PC): tshwm sim los ntawm cov teeb meem ntawm cov roj lossis cov roj paug. Kev Kho Mob: Siv Lub Tshuab Roj.
- Winding Deformation: Identified via >3db ntau cov lus teb rau kev sib cav. Kev daws: Kev kho Hoobkas.
V. Cov Khoom Siv Tseem Ceeb
- Theem Pib: HV METOHMMETHER, DC TXIV TSEEM CEEB, DC TUS KHEEJ SECTIO.
- Advanced: Feem Ntau Kev Tawm Tawm Txawv Tebchaws, SGA Analyzer, Cov Khoom Siv Hauv Zaus.
Cov Lus Tseem Ceeb:
- Kev kuaj cov roj ntau dua 15 degree hauv cov chaw ib nrab.
- Investigate >10% kev sib txawv ntawm cov ntaub ntawv Hoobkas.
- Siv tau kev tiv thaiv rov qab ua ntej ua kom muaj zog.
Txoj kev tsim qauv no ua kom tiav<0.2 annual failure rate post-commissioning. Maintain digital records for lifecycle management.