Title :
Synergic phenomena of multistress aged XLPE-cable insulation investigated by the evaluation of depolarisation current measurements and nuclear magnetic resonance
Author :
Reuter, M. ; Gockenbach, E. ; Borsi, H. ; Kreme, K. ; Blümich, B.
Author_Institution :
Inst. of Electr. Power Syst., Hannover Univ., Germany
Abstract :
Experimental investigations on cross-linked polyethylene insulation are reported concerning synergic phenomena resulting from multistress aging with different combined conductor temperatures, test durations, and electrical field strengths. The evaluation of depolarisation current measurements and nuclear magnetic resonance investigations reveal that, depending on the combination of aging parameters, the electric field strength can provide temperature induced effects in the polymer morphology which are monitored by changes of the spin-spin relaxation and the dielectric relaxation behaviour.
Keywords :
XLPE insulation; ageing; dielectric depolarisation; dielectric relaxation; nuclear magnetic resonance; power cable insulation; spin-spin relaxation; NMR; XLPE-cable insulation; conductor temperature; cross-linked polyethylene insulation; depolarisation current measurements; dielectric relaxation; electrical field strength; multistress aging; nuclear magnetic resonance; polymer morphology; power cable insulation; spin-spin relaxation; synergic phenomena; temperature induced effects; Aging; Conductors; Current measurement; Dielectrics and electrical insulation; Insulation testing; Morphology; Nuclear magnetic resonance; Polyethylene; Polymers; Temperature dependence;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04. 2004 Annual Report Conference on
Print_ISBN :
0-7803-8584-5
DOI :
10.1109/CEIDP.2004.1364239
