Cryogenic System for 80-kV DC HTS Cable in the KEPCO Power Grid

Author

Lim, J.H. ; Yang, H.S. ; Sohn, S.H. ; Yim, S.W. ; Jung, S.Y. ; Han, S.C. ; Kim, H.W. ; Kim, Y.H. ; Hwang, S.D.

Author_Institution

Future Technol. Lab., Korea Electr. Power Corp. Res. Inst., Daejeon, South Korea

Volume

25

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

4

Abstract

DC HTS cable has advantages in the absence of ac loss. Therefore, the Korea Electric Power Corporation (KEPCO) has started a project of operating and manufacturing technology for applying an 80-kV 500-MW 500-m-long dc HTS cable to the commercial power grid since 2011. LS Cable Ltd. has joined this project for designing and manufacturing an HTS power cable, and KEPCO has taken on cryogenic system and real power grid operation. The cryogenic system for an 80-kV dc HTS cable is composed mainly of Stirling-type cryocoolers. The Stirling cryocooler has been examined and verified by real grid operation in Icheon substation, and we therefore became assured of reliability for the cooling HTS cable system. We present the cryogenic system design, installation, and some results of preliminary tests in this paper.

Keywords

cryogenics; power cables; power grids; superconducting cables; DC HTS cable; HTS cable; HTS power cable; Icheon substation; KEPCO power grid; Korea Electric Power Corporation; LS Cable Ltd; cooling HTS cable system; cryogenic system; dc HTS cable; distance 500 m; power 500 MW; power grid; power grid operation; reliability; stirling-type cryocoolers; voltage 80 kV; Cooling; Heating; High-temperature superconductors; Nitrogen; Power cables; Superconducting cables; Cryogenic system; DC superconducting power cable; KEPCO; Korea electric power corporation (KEPCO); Stirling cryocooler; cryogenic system; stirling cryocooler;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2387393

Filename

7069219