Electrical and Mechanical Characteristics of Insulating Materials for HTS DC Cable and Cable Joint

Author

Woo-Jin Kim ; Hae-Jong Kim ; Jeon-Wook Cho ; Yeon Suk Choi ; Sang-Hyun Kim

Author_Institution

Dept. of Electr. Eng., Gyeongsang Nat. Univ., Jinju, South Korea

Volume

25

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

4

Abstract

A high-temperature superconducting (HTS) dc cable system consists of cable, termination, and cable joint. Polypropylene laminated paper (PPLP) and epoxy have been widely used as insulating material for HTS cable and cable joint. The electrical and mechanical characteristics of insulating materials at cryogenic temperature must be investigated for the long life, stable operation, and compactness of the cable. In order to develop an HTS dc cable and cable joint, it is important to understand the fundamental properties of insulating materials. In this paper, we discuss mainly about the electrical and mechanical characteristics of insulating materials for HTS dc cable and cable joint. We investigate the characteristics of dc and impulse voltage. The flashover and breakdown characteristics of PPLP, epoxy, and composite of epoxy-PPLP are studied. In addition, the mechanical characteristic such as tensile strength of PPLP at 77 and 300 K is discussed.

Keywords

cable jointing; composite insulating materials; cryogenics; electric breakdown; filled polymers; flashover; high-temperature superconductors; superconducting cables; tensile strength; HTS DC cable; breakdown characteristics; cable joint; cryogenic temperature; dc-impulse voltage; electrical characteristics; epoxy-PPLP composite; flashover characteristics; high-temperature superconducting dc cable system; insulating material; insulating materials; mechanical characteristics; polypropylene laminated paper; temperature 300 K; temperature 77 K; tensile strength; Cable insulation; Flashover; High-temperature superconductors; Joints; Oil filled cables; Superconducting cables; Cable joint; Flashover and breakdown; HTS dc cable; Insulation; PPLP and epoxy; flashover and breakdown; insulation;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2385958

Filename

7001596