scholarly journals Thermo-Hydraulic Analysis of a Tri-Axial High-Temperature Superconducting Power Cable with Respect to Installation Site Geography

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3898
Author(s):  
Youngjun Choi ◽  
Dongmin Kim ◽  
Changhyung Lee ◽  
Duyeon Won ◽  
Jaeun Yoo ◽  
...  
Keyword(s):  
High Temperature ◽  
Urban Areas ◽  
Cooling System ◽  
Power Cable ◽  
Cfd Analysis ◽  
Power Cables ◽  
Hydraulic Analysis ◽  
Long Distance ◽  
High Temperature Superconducting ◽  
Return Path

Various high-temperature superconducting (HTS) power cables are being developed or are ready for commercial operation to help energy suppliers meet the growing power demand in urban areas. Recently, triaxial HTS power cables have been developed by Korea Electric Power Corporation (KEPCO) and LS Cable & System. Further, KEPCO has been planning to install a 2 km long 23 kV/60 MVA triaxial HTS power cable to connect the Munsan and Seonyu substations and increase the stability of the power grid. The HTS power cables should be cooled down to a cryogenic temperature near 77 K. A thermo-hydraulic analysis of the cooling system considering the geographical characteristics of the installation site is essential for long-distance sections. This paper describes the thermo-hydraulic analysis of the triaxial HTS power cable to determine the proper mass flow rates of subcooled liquid nitrogen that meet the operating temperature and pressure of the cable for four configurations of cooling systems: (1) a single cooling system with an external return path, (2) a dual cooling system with an external return path, (3) a single cooling system with an internal return path, and (4) a dual cooling system with internal return path. Since the flow characteristics in a corrugated cable cryostat differ significantly from those in a typical annular tube, a computational fluid dynamics (CFD) analysis was conducted to estimate the pressure drop along the cable cryostat. With the CFD analysis and given heat loads in the cable, the temperature and the pressure variations along the cable were calculated and their pros and cons were compared for each configuration of the cooling system. This thermo-hydraulic analysis will be referenced in the actual installation of the HTS power cable between the Munsan and Seonyu substations.

scholarly journals A Simplified Model of Coaxial, Multilayer High-Temperature Superconducting Power Cables with Cu Formers for Transient Studies

Energies ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1514 ◽  
Author(s):  
Thai-Thanh Nguyen ◽  
Woon-Gyu Lee ◽  
Seok-Ju Lee ◽  
Minwon Park ◽  
Hak-Man Kim ◽  
...  
Keyword(s):  
High Temperature ◽  
Transient State ◽  
Transient Current ◽  
Power Cable ◽  
Power Cables ◽  
Cable Model ◽  
Transient Conditions ◽  
High Temperature Superconducting ◽  
Transient Study ◽  
Quenching Phenomenon

Bypassing transient current through copper (Cu) stabilizer layers reduces heat generation and temperature rise of high-temperature superconducting (HTS) conductors, which could protect HTS cables from burning out during transient conditions. The Cu layer connected in parallel with HTS tape layers impacts current distribution among layers and variations of phase resistance in either steady-state or transient conditions. Modeling the multilayer HTS power cable is important for transient studies. However, existing models of HTS power cables have only proposed HTS cables without the use of a Cu-former layer. To overcome this problem, the authors proposed a multilayer HTS power cable model that used a Cu-former layer in each phase for transient study. It was observed that resistance of the HTS conductor increased significantly in the transient state due to a quenching phenomenon, which made the transient current mainly flow into the Cu-former layers. Since resistance of the Cu-former layer has a significant impact on the transient current, detailed modeling of the Cu-former layer is described in this study. The feasibility of the developed HTS cable model is evaluated in the PSCAD/EMTDC program.

Detection of Series Faults in High-Temperature Superconducting DC Power Cables Using Machine Learning

2021 ◽  
pp. 1-1
Author(s):  
Jeong Ho Choi ◽  
Chanyeop Park ◽  
Peter Cheetham ◽  
Chul Han Kim ◽  
Sastry Pamidi ◽  
...  
Keyword(s):  
Machine Learning ◽  
High Temperature ◽  
Power Cables ◽  
High Temperature Superconducting ◽  
Dc Power

Installation and operation of the Southwire 30-meter high-temperature superconducting power cable

2001 ◽  
Vol 11 (1) ◽  
pp. 2467-2472 ◽  
Author(s):  
J.P. Stovall ◽  
J.A. Demko ◽  
P.W. Fisher ◽  
M.J. Gouge ◽  
J.W. Lue ◽  
...  
Keyword(s):  
High Temperature ◽  
Power Cable ◽  
High Temperature Superconducting

Flux Leakage Reduction in Linear Vernier Generators Using High-Temperature Superconducting Elements

Vestnik MEI ◽  
2021 ◽  
pp. 82-90
Author(s):  
Andrey A. Drozdov ◽  
◽  
Pavel A. Kurbatov ◽  
Ekaterina P. Kurbatova ◽  
◽  
...  
Keyword(s):  
High Temperature ◽  
Power Plants ◽  
Cooling System ◽  
Magnetic Moments ◽  
Interaction Force ◽  
Wave Power ◽  
Power Performance ◽  
High Temperature Superconducting ◽  
Motion Speed ◽  
Generator Design

The article presents the results of studies aimed at improving the power performance indicators of linear electric generators for wave power plants by reducing the flux leakages using high-temperature superconducting (HTS) inserts placed in between the teeth. The generator design involving application of the Vernier principle for magnetic flux modulation with a translator in the form of a hollow cylinder is considered. Generators of this type are used in float wave power plants driven directly by a reciprocating float, which transmits large forces at a low motion speed. The calculations were carried out using the HTS properties modeling procedure based on representing the currents induced in a superconductor in the form of magnetic moments of these currents, which made it possible to simplify the analysis of the electromagnetic field in the generator without significant additional errors. As a result, the characteristics of the electromagnetic force longitudinal components and phase winding flux linkages versus the translator displacement have been obtained. The use of HTS inserts and a distributed winding in the stator made it possible to reduce the electromagnetic leakage losses and increase the interaction force between the stator and translator. However, since the additional outlays for the cooling system and thermal insulation of the HTS elements are commensurable with the generator cost, the obtained results on improving the power performance parameters do not allow an unambiguous statement to be made about the effectiveness of the considered technical solutions.

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