With the advent of commercialization in high temperature superconducting (HTS) cable systems, maintenance techniques for the HTS cable systems are required. In the HTS cable systems, which must maintain the superconducting state during the operation, real-time monitoring is essential. Therefore, in this paper, a monitoring technique for three-phase HTS cables is proposed. The proposed technique, which is based on time-frequency domain reflectometry, has an efficient instrument configuration compared to conventional techniques. Also, by extracting a feature in the time-frequency domain of the monitoring signals, abnormal phase in a three-phase HTS cable can be identified. The proposed technique is demonstrated by experimental data using a real-world three-phase HTS cable. In order to simulate a local quench in the operation of three-phase HTS cable systems, heating elements are utilized in the experimental setup. It is expected that the proposed technique will improve reliability in operating the three-phase HTS cable systems.
Bibliographical noteFunding Information:
Manuscript received November 26, 2020; revised January 27, 2021 and February 5, 2021; accepted February 9, 2021. Date of publication February 18, 2021; date of current version March 12, 2021. This work was supported in part by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT, and Future Planning under Grant NRF-2020R1A2B5B03001692 and in part by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education under Grant NRF-2020R1A6A3A13075204. (Corresponding author: Yong-June Shin.) The authors are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Korea (e-mail: email@example.com).
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All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering