Partial discharges due to electrical treeing in polymers: phase-resolved and time-sequence observation and analysis

• Published in: Journal of physics. D, Applied physics Vol. 29; no. 11; pp. 2922 - 2931
• Main Authors: Suwarno, Suzuoki, Y, Komori, F, Mizutani, T
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 14.11.1996; Institute of Physics
• Subjects: Applied sciences; Chemical reactions and properties; Degradation; Electrical engineering. Electrical power engineering; Exact sciences and technology; Materials; Organic polymers; Physicochemistry of polymers; Degradation; EVA; Acrylic acid copolymer; Partial discharge; Low density ethylene polymer; Electric insulating material; Treeing; Ethylene copolymer; Electric field effect; Experimental study; Modeling
• ISSN: 0022-3727; 1361-6463
• DOI: 10.1088/0022-3727/29/11/028

An investigation into the partial discharge (PD) due to electrical treeing degradation in low density polyethylene, ethylene-vinyl acetate copolymer and ethylene-acrylic acid copolymer. Experimental results revealed that the PD magnitude was strongly affected by the instantaneous applied voltage and that the occurrence of a PD can be determined by the time derivative of the voltage. The PD pulse sequence analysis revealed the following: (i) a PD occurs in a discharge path which consists of a tree trunk and branches extending from the trunk; (ii) in each discharge path, one PD occurs per half cycle. Based on these facts, a model of PDs due to electrical treeing is proposed. (Abstract quotes from original text)