Impact of Smart HTS Transmission Cable to Protection Systems of the Power Grid in South Korea

In South Korea, Korea Electrotechnology Research Institute (KERI) has developed a 154 kV smart High Temperature Superconducting (HTS) cable system with fault current limiting function since May 2017. This project is funded by the Ministry of Trade, Industry, and Energy of Republic of Korea. It is ve...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2019-08, Vol.29 (5), p.1-5
Main Authors: Ko, Eun Young, Lee, Seung Ryul, Seo, Sangsoo, Cho, Jeonwook
Format: Article
Language:English
Subjects:
Circuit faults
Current differential relay
distance relay
Electricity distribution
Fault currents
High temperature
High-temperature superconductors
HTS
Impedance
Power cables
protection coordination
Protection systems
PSCAD
Relay systems
Relays
Superconducting cables
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Summary:In South Korea, Korea Electrotechnology Research Institute (KERI) has developed a 154 kV smart High Temperature Superconducting (HTS) cable system with fault current limiting function since May 2017. This project is funded by the Ministry of Trade, Industry, and Energy of Republic of Korea. It is very important to design the protective relay system for a successful application of the smart HTS cable system to a practical power grid. In general, the smart HTS cable can have a negative impact on the protective coordination in power transmission system because of the variable impedance of the cable. This paper reviews some protection problems which can be caused by the application of the 154 kV smart HTS cable to power transmission systems in Korea and proposes a protection scheme for a test power system. And then we conduct a basic study to find solutions for the problems using an electromagnetic transient program, PSCAD/EMTDC.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2019.2908611