Analysis of the Temperature Characteristics of Three-Phase Coaxial Superconducting Power Cable according to a Liquid Nitrogen Circulation Method for Real-Grid Application in Korea

Seok-Ju Lee, Hae-Jin Sung, Minwon Park, DuYean Won, Jaeun Yoo and Hyung Suk Yang
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Seok-Ju Lee: Department of Electrical Engineering, Changwon National University, Changwon 641-773, Korea
Hae-Jin Sung: Department of Electrical Engineering, Changwon National University, Changwon 641-773, Korea
Minwon Park: Department of Electrical Engineering, Changwon National University, Changwon 641-773, Korea
DuYean Won: Korea Electric Power Corporation Research Institute, Daejeon 34056, Korea
Jaeun Yoo: Korea Electric Power Corporation Research Institute, Daejeon 34056, Korea
Hyung Suk Yang: Korea Electric Power Corporation Research Institute, Daejeon 34056, Korea

Energies, 2019, vol. 12, issue 9, 1-11

Abstract: Large-capacity superconducting power cables are in the spotlight to replace existing underground transmission power cables for energy power transmission. Among them, the three-phase coaxial superconducting power cable has the economic advantage of reducing the superconducting shielding layer by enabling magnetic shielding when the three phases are homogeneous without an independent superconducting shielding layer for magnetic shielding. In order to develop the three-phase coaxial superconducting power cable, the electrical and structural design should be carried out to construct the superconducting layer. However, the thermal design and analysis for the cooling of the three-phase coaxial superconducting power cable must be done first, so that the electrical design can be made using the temperature transferred to the superconducting layer. The three-phase coaxial superconducting cable requires a cooling system to circulate the cryogenic refrigerant for cooling below a certain temperature, and the structure of the cable through which the cryogenic refrigerant travels must also be analyzed. In this paper, the authors conducted a longitudinal temperature analysis according to the structure of the refrigerant circulation system of the cable and proposed a refrigerant circulation system suitable for this development. The temperature profile according to this analysis was then used as a function of temperature for the electrical (superconducting and insulating layers) design of the three-phase coaxial superconducting power cable. It is also expected to be used to analyze the cooling structure of the three-phase coaxial superconducting power cable installed in the real grid system.

Keywords: high temperature superconducting (HTS) cable; three-phase coaxial HTS cable; cryogenic cooling method (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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