Title :
Space charge, oxidation and morphology changes in low density polyethylene during high voltage DC ageing
Author :
Oldervoll, Frørydis ; Ildstad, Erling
Author_Institution :
Dept. of Electr. Power Eng., Norwegian Univ. of Sci. & Technol., Trondheim, Norway
Abstract :
It is important to get increased knowledge on how extruded insulation performs under HVDC ageing. In this work low density polyethylene with and without an antioxidant additive was subjected to thermal and electrical ageing. During ageing the crystallinity increased in both materials but no changes in the oxidation level was observed. The antioxidant additive had a major effect on the space charge accumulation during ageing
Keywords :
ageing; insulation testing; oxidation; polyethylene insulation; polymer structure; power cable insulation; space charge; HVDC ageing; antioxidant additive; cable insulation; charge distribution; crystallinity increase; electrical ageing; extruded insulation; low density polyethylene; oxidation level; space charge accumulation; thermal ageing; Additives; Aging; Crystalline materials; Crystallization; HVDC transmission; Insulation; Morphology; Oxidation; Polyethylene; Space charge;
Conference_Titel :
Electrical Insulation, 2000. Conference Record of the 2000 IEEE International Symposium on
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-5931-3
DOI :
10.1109/ELINSL.2000.845552
