The application of the cryogenic system on the HTS power cable circuit in actual grid |
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| Authors: | Yang-Hun Kim Su-Kil Lee Hyun-Man Jang Young-Woong Kim Keun-Tae Lee Chang-Youl Choi Cheol-Hwi Ryu Han-Joong Kim Si-Dole Hwang Hyung-Suk Yang Song-Ho Sohn Ji-Hyun Lim |
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| Affiliation: | 1. LS Cable & System Ltd., Republic of Korea;2. KEPCO Research Institute, Republic of Korea;1. Institute of Refrigeration and Cryogenics, Zhejiang University, Hangzhou 310027, China;2. Aerospace Research Institute of Materials and Processing Technology, Beijing 100076, China;1. Center of Applied Superconductivity and Sustainable Energy Research, Chubu University, Kasugai, Aichi 487-8501, Japan;2. Department of Electric Engineering, Chubu University, Kasugai, Aich, 487-8501, Japan;1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China;2. ITER IO, Tokamak Department, Magnet Division, 13067 St. Paul lez Durance, France;3. China International Nuclear Fusion Energy Program Execution, Beijing 100086, China;1. Chubu University, 1200 Matsumoto-cho, Kasugai, Aichi 487-8501, Japan;2. R&D partnership for Ishikari Superconducting DC Power Transmission System (I-SPOT), 2-17-2 Nishi-Shinbashi, Minato, Tokyo 105-0003, Japan |
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| Abstract: | The 22.9 kV/50 MVA AC HTS power cable system consisted of power cable with 410 m length and cryogenic system has been manufactured by LS Cable & System and installed in Icheon substation of KEPCO grid in the end of 2010. High temperature superconductor only appears the superconductivity at the constant temperate range. So in order to maintain the superconductivity, the cryogenic system is needed. The cryogenic system, the open-loop type, is consisted of the Pressure Control System (PCS), Gas/liquid separator, Circulation Pump, Decompression unit, Filter and so on. Decompression unit is a device that keeps the sub-cooled nitrogen by way of the latent heat of evaporation and includes the heat exchanger. The effectiveness-NTU method is used for the design of the heat exchanger. After installation of the cryogenic system on the site, the test of the cooling capacity of the cryogenic system and commissioning tests were performed. During the grid operation of the HTS power cable system, no major problems have been encountered to this point. The cryogenic system has been operated sufficiently to maintain a stable of the HTS power cable system. This paper will summarize the design of the cryogenic system and the results of the grid operation. |
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