Title :
Semi-quantitative analysis of photoluminescence in thermoelectrically aged cables: II-analysis of a population of cables
Author :
Teyssedre, G. ; Laurent, C. ; Montanari, G.C.
Author_Institution :
LAPLACE (Lab. Plasma et Conversion d´´Energie), Univ. de Toulouse, Toulouse, France
fDate :
8/1/2009 12:00:00 AM
Abstract :
A set of thermo-electrically aged cross-linked polyethylene-insulated HVAC cables has been characterized by photoluminescence measurements. The photoluminescence spectra have been decomposed into a set of seven bands representing the response of three contributions to the emission: bulk cross-linked polyethylene emission, fluorescence of the antioxidant used in the semi-conducting screens of the cables, peaking at 400 nm, and an emission at 540 nm that has been correlated to the yellowing of the cables observed during thermal ageing. From the analysis of the cable radius dependence of these emissions, it is shown that traces of the antioxidant can be found in the 14 mm-thick insulation after less than 5000 h of ageing at 90 degC. The emissions related to the antioxidant and to yellowing appear dependent on the cable manufacturing process.
Keywords :
XLPE insulation; ageing; photoluminescence; power cable insulation; thermoelectric devices; cable manufacturing process; cross-linked polyethylene-insulated HVAC power cables; photoluminescence measurements; semiquantitative analysis; size 14 mm; size 400 nm; size 540 nm; temperature 90 C; thermal ageing; thermoelectrically aged cables; Aging; Cable insulation; Chemicals; Dielectrics and electrical insulation; Fluorescence; Photoluminescence; Polyethylene; Thermal stresses; Thermoelectricity; Uninterruptible power systems; Cross-linked polyethylene, high-voltage cable, antioxidant, diffusion.;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
DOI :
10.1109/TDEI.2009.5211874
