Synergistic improved electrical resistivity-temperature characteristics and DC breakdown strength in insulating XLPE composites by incorporating positive temperature coefficient particles

Guimin Jiang; Yuanxiang Zhou; Chenyuan Teng; Yunxiao Zhang; Xin Huang; Luming Zhou; Da Yang

Polymer Testing (Jan 2023)

Synergistic improved electrical resistivity-temperature characteristics and DC breakdown strength in insulating XLPE composites by incorporating positive temperature coefficient particles

Guimin Jiang,
Yuanxiang Zhou,
Chenyuan Teng,
Yunxiao Zhang,
Xin Huang,
Luming Zhou,
Da Yang

Affiliations

Guimin Jiang: The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Xinjiang University, No.777 Huarui Street, Urumqi, China
Yuanxiang Zhou: The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Xinjiang University, No.777 Huarui Street, Urumqi, China; State Key Laboratory of Power System and Generation Equipment & Department of Electrical Engineering, Tsinghua University, No. 30 Shuangqing Street, Beijing, China; Corresponding author. The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Xinjiang University, No.777 Huarui Street, Urumqi, China.
Chenyuan Teng: College of Information Engineering, Zhejiang University of Technology, Hangzhou, 310023, China; Corresponding author.
Yunxiao Zhang: State Key Laboratory of Power System and Generation Equipment & Department of Electrical Engineering, Tsinghua University, No. 30 Shuangqing Street, Beijing, China; Corresponding author.
Xin Huang: State Key Laboratory of Power System and Generation Equipment & Department of Electrical Engineering, Tsinghua University, No. 30 Shuangqing Street, Beijing, China
Luming Zhou: School of Electronics and Computer Science, University of Southampton, SO17 1BJ, UK
Da Yang: The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Xinjiang University, No.777 Huarui Street, Urumqi, China

Journal volume & issue: Vol. 117
p. 107839

Abstract

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Weakening the electrical resistivity-temperature dependence of cross-linked polyethene (XLPE) is an effective way to enhance the electric field uniformity of high-voltage direct current (HVDC) cables. Therefore, an attempt is made to suppress the negative temperature coefficient (NTC) of electrical resistivity by incorporating BaTiO3-based ceramic fillers with positive temperature coefficient (PTC) electrical resistivity into XLPE. Morphology characterization indicated that PTC particles were well dispersed in the XLPE matrix. The measurements of electrical resistivity and DC breakdown strength are carried out from 30 °C to 90 °C. The electrical resistivity and DC breakdown strength of the sample at high temperatures were significantly improved with the introduction of PTC particles, which is attributed to the deep traps near the Curie temperature region. The high doping content has a better suppression of the NTC effect. The activation energy (0.63 eV) and NTC strength (1.74) of the sample with the addition of 10 wt% of PTC are considerably reduced compared with XLPE. The content of PTC particles was positively correlated to the enhancement of electrical resistivity and DC breakdown strength. The optimum content for DC breakdown strength is about 5 wt%. The low electrical resistivity-temperature dependence of insulation performance shows a potential to obtain temperature-stable HVDC cable insulation.

Published in Polymer Testing

ISSN: 0142-9418 (Print); 1873-2348 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Chemical technology: Polymers and polymer manufacture
Website: https://www.journals.elsevier.com/polymer-testing

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