PD kuaj tau thiab ntsuas li cas hauv thaj teb thiab thaum lub Hoobkas kuaj?
Muaj plaub txoj hauv kev nrhiav pom PD:
|
Txoj kev |
Sensor |
Freq Band |
rhiab heev |
Pros |
Cons |
|
Hluav taws xob (IEC 60270) |
Coupling capacitor / bushing kais |
30 kHz-1 MHz |
1-10 Pc |
Quantified hauv pC; txheem |
Ua rau lub suab nrov; yuav tsum tau de{0}}energized |
|
UHF |
Internal kav hlau txais xov / roj valve sojntsuam |
300 MHz-3 GHz |
1-5 pC |
Tiv thaiv kom tsis txhob muaj suab nrov; tau localize |
Yuav tsum tau siv roj valve; ib nrab-quantitative |
|
HFCT |
Clamp- ntawm CT ntawm av lead |
1-30 MHz |
5-20 hli |
Tsis yog -invasive, clamp-rau |
Tsis tau yooj yim localize |
|
Acoustic (AE) |
Piezoelectric sensor ntawm lub tank phab ntsa |
20 kHz-300 kHz |
~ 10-50 hli |
Precise localization (triangulation) |
Tsis zoo rhiab heev rau sab hauv PD; teeb liab attenuation |
|
DGA |
Roj qhov chaw nres nkoj |
Tshuaj |
ppm H₂/CH₄/C₂H₂ |
Muaj dav; txheeb xyuas PD indirectly |
Tsis tiag- sijhawm; gas lags qab PD |
Pom zoo ua ke:
• Hoobkas: IEC 60270 (calibrated pC).
• Ntawm -kab (transformer): UHF probes + DGA.
• Ntawm -kab (cable/GIS): HFCT clamps.
• Site localization: Acoustic sensors rau triangulation.