Title :
Estimation of conductivity and permittivity of water trees in PE from space charge distribution measurements
Author :
Toyoda, T. ; Mukai, S. ; Ohki, Y. ; Li, Y. ; Maeno, T.
Author_Institution :
Waseda Univ., Tokyo, Japan
fDate :
3/1/2001 12:00:00 AM
Abstract :
Using an improved pulsed electroacoustic system which is capable of measuring space charge distribution at minimum intervals of 25 μs, the charge distribution inside water-treed polyethylene (PE) was examined. From the results, the frequency dependencies of conductivity and permittivity were examined for water trees grown in PE. The conductivity of the water-treed region is found to be >1010× higher than that of non-treed regions, while the permittivity increase is only slight
Keywords :
XLPE insulation; charge measurement; insulation testing; permittivity; space charge; trees (electrical); XLPE sheets; conductivity; frequency dependence; permittivity; polyethylene; pulsed electroacoustic system; space charge distribution measurements; water trees; Charge measurement; Conductivity measurement; Current measurement; Frequency; Permittivity measurement; Polyethylene; Pulse measurements; Pulsed electroacoustic methods; Space charge; Trees - insulation;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
