Impact of 154-kV HTS Cable to Protection Systems of the Power Grid in South Korea

Lee, Seung Ryul; Lee, Jong Joo; Yoon, Jae-Young; Kang, Yoen Woog; Hur, Jin

doi:10.1109/tasc.2016.2535967

Cited by 15 publications

(9 citation statements)

References 1 publication

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“…The AmpaCity project in Germany for instance eradicated the need for a large 110/10 kV substation by carrying the equivalent power at 10kV requiring only medium voltage switchgear and thus saving valuable space [6]. Korea and Japan are making advances through in-grid demonstration projects on Jeju Island [7] and in a substation in Yokohama [8] respectively. There is also a project in advanced stages to integrate a superconducting feeder cable into the city railway network [8].…”

Section: A Cablingmentioning

confidence: 99%

Overview and Assessment of Superconducting Technologies for Power Grid Applications

McGuckin

Burt

2018

2018 53rd International Universities Power Engineering Conference (UPEC)

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It is expected that superconducting technologies will play an important role in the future smart grid because their application brings a host of benefits, most notably a decrease power loss that allows for overload relief, the lowering of voltage levels, power quality enhancement and subsequent grid stability. The phenomenon of superconductivity brings these potential qualities to the grid in the form of a number of technologies analogous to the commonly accepted, conventional types in the form of cabling, fault current limiters, energy storage (ES), generators and transformers. This paper aims to provide an overview of these technologies and their current and potential applications.

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Section: A Cablingmentioning

confidence: 99%

Overview and Assessment of Superconducting Technologies for Power Grid Applications

McGuckin

Burt

2018

2018 53rd International Universities Power Engineering Conference (UPEC)

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“…The Jeju Smart Grid Demonstration Center has completed the 1 km, 154 kV, 600 MVA 3 phase HTS power cable test. Recently, the 3phase coaxial HTS power cable of 23 kV, 60 MVA is being installed the Munsan-Seonyu substations of about 3 km long [10], [11].…”

Section: Introductionmentioning

confidence: 99%

Pressure Drop Characteristics of Concentric Spiral Corrugation Cryostats for a HTS Power Cable Considering Core Surface Roughness

Choi

Kim

2023

Preprint

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Recently, interest in renewable energy systems such as solar, hydrogen and wind power has increased as an alternative to fossil fuels. Renewable energy sources such as large wind and solar farms require long-distance power transmission because they are located inland or offshore, far from the city where power is required. High Temperature Superconducting (HTS) power cables have more than 5 times the transmission capacity and less than one-tenth the transmission loss compared to the existing cables of the same size, enabling large-capacity transmission at low voltage. In addition, it has perfect magnetic shielding performance, so it can fundamentally solve the electromagnetic wave environmental problem, and does not use any environmental pollutants in the existing high-voltage power cables. For commercialization of HTS power cables, unmanned operation and long-distance cooling technology of several kilometers is essential, and pressure drop characteristic is important. The cryostat's spiral corrugation tube is easier to bend, but unlike the round tube, the pressure drop cannot be calculated using the Moody chart. In addition, it is more difficult to predict the pressure drop characteristics due to the irregular surface roughness of the binder wound around the cable core. In this paper, a suitable CFD model of a spiral corrugation tube with a core was designed by referring to the water experiments from previous studies. In the four cases geometry, when the surface roughness of the core was 10mm, most errors were 15% and the maximum errors were 23%. These results will be used as a reference for the design of long-distance HTS power cables.

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“…The impacts of HTS cables on power system protection have been studied in [16]. It was shown that the change of cable impedance during a fault has a negative impact on the distance relay.…”

Section: Introductionmentioning

confidence: 99%

Fault Analysis and Design of a Protection System for a Mesh Power System with a Co-Axial HTS Power Cable

et al. 2020

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The uses of high-temperature superconducting (HTS) cables pose a challenge of power system protection since the impedance of the HTS cable is varied during fault conditions. The protection systems should be designed properly to ensure the reliability and stability of the whole system. This paper presents a fault analysis of the co-axial HTS cable in the mesh system and proposes a coordinated protection system. In the proposed protection system, the main protection is the differential current relay whereas the backup protections are the overcurrent and directional overcurrent relays. The normal and abnormal relay operations are considered to analyze the transient fault current in the HTS cable and evaluate the performance of the proposed coordinated protection system. Characteristics of cable impedances and temperatures under various fault conditions are presented. The proposed protection scheme is validated by the simulation in the PSCAD/EMTDC program. Simulation results show that the coordinated protection scheme could successfully protect the HTS cables in both normal and abnormal relay operations.

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Impact of 154-kV HTS Cable to Protection Systems of the Power Grid in South Korea

Cited by 15 publications

References 1 publication

Overview and Assessment of Superconducting Technologies for Power Grid Applications

Overview and Assessment of Superconducting Technologies for Power Grid Applications

Pressure Drop Characteristics of Concentric Spiral Corrugation Cryostats for a HTS Power Cable Considering Core Surface Roughness

Fault Analysis and Design of a Protection System for a Mesh Power System with a Co-Axial HTS Power Cable

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