Effect of Graphene Coating on Space Charge Characteristic of XLPE and Semiconductive Layer at Different Temperatures

Zhipeng Lei; Davide Fabiani; Chuanyang Li; Simone Vincenzo Suraci; Giacomo Selleri; Tao Han; Marco Speranza; Filippo Grolli; Fabrizio Palmieri

doi:10.1109/ACCESS.2019.2938539

IEEE Access (Jan 2019)

Effect of Graphene Coating on Space Charge Characteristic of XLPE and Semiconductive Layer at Different Temperatures

Zhipeng Lei,
Davide Fabiani,
Chuanyang Li,
Simone Vincenzo Suraci,
Giacomo Selleri,
Tao Han,
Marco Speranza,
Filippo Grolli,
Fabrizio Palmieri

Affiliations

Zhipeng Lei: ORCiD; Shanxi Key Laboratory of Mining Electrical Equipment and Intelligent Control, College of Electrical and Power Engineering, Taiyuan University of Technology, Taiyuan, China
Davide Fabiani: Department of Electrical, Electronic, and Information Engineering “G. Marconi,”, University of Bologna, Bologna, Italy
Chuanyang Li: Department of Electrical, Electronic, and Information Engineering “G. Marconi,”, University of Bologna, Bologna, Italy
Simone Vincenzo Suraci: ORCiD; Department of Electrical, Electronic, and Information Engineering “G. Marconi,”, University of Bologna, Bologna, Italy
Giacomo Selleri: Department of Electrical, Electronic, and Information Engineering “G. Marconi,”, University of Bologna, Bologna, Italy
Tao Han: ORCiD; Department of Electrical, Electronic, and Information Engineering “G. Marconi,”, University of Bologna, Bologna, Italy
Marco Speranza: Department of Electrical, Electronic, and Information Engineering “G. Marconi,”, University of Bologna, Bologna, Italy
Filippo Grolli: Department of Electrical, Electronic, and Information Engineering “G. Marconi,”, University of Bologna, Bologna, Italy
Fabrizio Palmieri: Department of Electrical, Electronic, and Information Engineering “G. Marconi,”, University of Bologna, Bologna, Italy

DOI: https://doi.org/10.1109/ACCESS.2019.2938539
Journal volume & issue: Vol. 7
pp. 124540 – 124547

Abstract

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DC cross-linked polyethylene (XLPE) power cables are being used recently for HV/EHV applications, the reliability of which is claimed to be significantly affected by space charge accumulation in the insulating material. Many methods have been provided for limiting the injection and accumulation of space charge. In the paper, three kinds of specimens with graphene coating applied on a sandwich composed of XLPE and semiconductive layer were made. Space charge distribution of specimens was measured at 10 kV/mm and 40 kV/mm under room temperature and 60 °C. The measurement results show that positive charges are injected and accumulate in reference XLPE specimen. Negative charge accumulates in XLPE, and the quantity of positive charge injected from anode is significantly reduced, when graphene is coated on the semiconductive side. Little space charge is injected into XLPE coated with graphene, and positive charge accumulates near the interface between XLPE and electrode, which lowers electric field near the anode. Graphene layer introduced deeper trap distribution, thus making difficult negative charge injection from the cathode into XLPE.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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