Title :
Diagnostic markers for AC power cable insulation aging based on space charge measurements
Author :
Montanari, G.C. ; Fabiani, D. ; Melloni, M. ; Palmieri, Francesco
Author_Institution :
DIE-LIMAT, Bologna, Italy
Abstract :
The results of space charge measurements carried out on specimens cut from high-voltage XLPE cables are discussed in this paper. The specimens were aged in the laboratory under electrical, thermal and thermoelectrical stresses, for various times, with the purpose of searching for diagnostic indicators derived from space charge data. It is shown that two quantities extracted from space charge measurements, that is, the threshold for space charge accumulation and the apparent, trap-controlled, mobility display a good correlation with aging time and stress, thus providing interesting markers for aging diagnosis and life estimation. Aging models are proposed correlating markers with aging time.
Keywords :
XLPE insulation; ageing; charge measurement; insulation testing; power cable insulation; power cable testing; space charge; aging diagnosis; aging time; diagnostic indicators; electrical stresses; high-voltage XLPE cables; life estimation; space charge accumulation; space charge data; space charge measurements; thermal stresses; thermoelectrical-stresses; trap-controlled mobility; Aging; Cables; Charge measurement; Current measurement; Laboratories; Power cable insulation; Power measurement; Space charge; Thermal stresses; Thermoelectricity;
Conference_Titel :
Electrical Insulation, 2002. Conference Record of the 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7337-5
DOI :
10.1109/ELINSL.2002.995975
