DocumentCode :
2927834
Title :
Novel online RF technique for detection of water trees in underground powered distribution cables
Author :
Gonzalez, A. Giovanni ; Paprotny, Igor ; White, Richard M. ; Wright, Paul K.
Author_Institution :
Dept. of Mech. Eng., Univ. of California, Berkeley, Berkeley, CA, USA
fYear :
2011
fDate :
5-8 June 2011
Firstpage :
345
Lastpage :
348
Abstract :
In this paper we investigate the use of RF signals to measure dielectric loss and the change of permittivity of an energized cable´s insulation. One common degradation mechanism is growth of water trees in the presence of water. We present theoretical analysis of a novel on-line water tree detection technique based on using RF TEM wave propagation via test points on an elbow. Our method is based on injecting a high frequency RF signal into an energized cable at different points of the line voltage values and measure the nonlinearity of permittivity and dielectric loss.
Keywords :
dielectric loss measurement; insulation testing; permittivity measurement; power cable insulation; power cable testing; trees (electrical); underground cables; underground distribution systems; RF TEM wave propagation; dielectric loss measurement; energized cable insulation; high frequency RF signal; novel online RF technique; permittivity change; permittivity nonlinearity; underground powered distribution cables; water tree detection; Dielectrics; Permittivity measurement; Power cable insulation; Power cables; Voltage measurement; RF diagnositc methods; relative permittivity of water trees; underground cables;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Insulation Conference (EIC), 2011
Conference_Location :
Annapolis, MD
ISSN :
pending
Print_ISBN :
978-1-4577-0278-5
Electronic_ISBN :
pending
Type :
conf
DOI :
10.1109/EIC.2011.5996175
Filename :
5996175
Link To Document :
بازگشت