Practical AC loss and thermal considerations for HTS power transmission cable systems

Demko, J. A.; Lue, J.W.; Gouge, M.J.; Stovall, J.P.; Butterworth, Z.; Sinha, Uday Kumar; Hughey, R.L.

doi:10.1109/77.920133

Cited by 35 publications

(10 citation statements)

References 7 publications

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“…Therefore, in this paper, we present an optimal circulation system by analyzing liquid nitrogen circulation system in various cases using numerical method using FEM. The analytical results of this paper will serve as useful information for the analysis and determination of the cooling and circulating structure system of the commercial-grade three-phase coaxial superconducting power cable [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Figure 1 shows the overall system configuration of a three-phase coaxial superconducting power cable.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Temperature Characteristics of Three-Phase Coaxial Superconducting Power Cable according to a Liquid Nitrogen Circulation Method for Real-Grid Application in Korea

et al. 2019

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Large-capacity superconducting power cables are in the spotlight to replace existing underground transmission power cables for energy power transmission. Among them, the three-phase coaxial superconducting power cable has the economic advantage of reducing the superconducting shielding layer by enabling magnetic shielding when the three phases are homogeneous without an independent superconducting shielding layer for magnetic shielding. In order to develop the three-phase coaxial superconducting power cable, the electrical and structural design should be carried out to construct the superconducting layer. However, the thermal design and analysis for the cooling of the three-phase coaxial superconducting power cable must be done first, so that the electrical design can be made using the temperature transferred to the superconducting layer. The three-phase coaxial superconducting cable requires a cooling system to circulate the cryogenic refrigerant for cooling below a certain temperature, and the structure of the cable through which the cryogenic refrigerant travels must also be analyzed. In this paper, the authors conducted a longitudinal temperature analysis according to the structure of the refrigerant circulation system of the cable and proposed a refrigerant circulation system suitable for this development. The temperature profile according to this analysis was then used as a function of temperature for the electrical (superconducting and insulating layers) design of the three-phase coaxial superconducting power cable. It is also expected to be used to analyze the cooling structure of the three-phase coaxial superconducting power cable installed in the real grid system.

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Section: Introductionmentioning

confidence: 99%

Analysis of the Temperature Characteristics of Three-Phase Coaxial Superconducting Power Cable according to a Liquid Nitrogen Circulation Method for Real-Grid Application in Korea

et al. 2019

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“…The 2G tape had several buffer layers between the YBCO and the slightly magnetic Ni-5%W substrate. The advantages and disadvantages as well as the temperature profiles for both cooling configurations have been discussed in more detail elsewhere [3]. The 25-m HTS-FCL utilized the HTS Triax™ cable architecture with two HTS tape layers per phase, where all three phases surround a concentric corrugated/flexible stainless steel core [2].…”

Section: Cable Designmentioning

confidence: 99%

Test Results for a 25 Meter Prototype Fault Current Limiting HTS Cable for Project Hydra

Rey¹,

Duckworth²,

Demko³

et al. 2010

AIP Conference Proceedings

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The Oak Ridge National Laboratory (ORNL) has tested a 25-m long prototype High Temperature Superconducting (HTS) cable with inherent Fault-Current Limiting (FCL) capability at its HTS cable test facility. The HTS-FCL cable and terminations were designed and fabricated by Ultera, which is a joint venture between Southwire and nkt cables. System integration and HTS wire were provided by American Superconductor Corporation who was the overall team leader of the project. The ultimate goal of the 25-m HTS-FCL cable test program was to verify the design and ensure the operational integrity for the eventual installation of a ~ 200-m fully functional HTS-FCL cable in the Consolidated Edison electric grid located in downtown New York City. The 25-m HTS-FCL cable consisted of a three-phase (3-Φ) HTS Triax™ design with a cold dielectric between the phases. The HTS-FCL cable had an operational voltage of 13.8 kV phase-tophase (7967 V phase-to-ground) and an operating current of 4000 A rms per phase, which is the highest operating current to date of any HTS cable. The 25-m HTS-FCL cable was subjected to a series of cryogenic and electrical tests. Test results from the 25-m HTS-FCL cable are presented and discussed.

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“…For long transmission lines, the thermal losses become a important parameter that must be predicted and controlled, however there is a limited number of available models in the literature [3] to predict the thermal behavior of superconducting cables.…”

Section: Introductionmentioning

confidence: 99%

Thermal Modeling of Helium Cooled High-Temperature Superconducting DC Transmission Cable

Souza

Ordóñez

Hovsapian

et al. 2011

IEEE Trans. Appl. Supercond.

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The recent increase in distributed power generation is highlighting the demand to investigate and implement better and more efficient power distribution grids. High-temperature superconducting (HTS) DC transmission cables have the potential to address the need for more efficient transmission and their usage is expected to increase in the future. Thermal modeling of HTS DC cables is a critical tool to have in order to better understand and characterize the operation of such transmission lines. This paper introduces a general computational model for a HTS DC cable. A physical model, based on fundamental correlations and principles of classical thermodynamics, mass and heat transfer, was developed and the resulting differential equations were discretized in space. Therefore, the combination of the physical model with the finite volume scheme for the discretization of the differential equations is referenced as Volume Element Model, (VEM). The model accounts for heat transfer by conduction, convection and radiation obtaining numerically the temperature distribution of superconductive cables operating under different environmental, operational and design conditions. As a result, the model is expected to be a useful tool for simulation, design, and optimization of HTS DC transmission cables.

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Practical AC loss and thermal considerations for HTS power transmission cable systems

Cited by 35 publications

References 7 publications

Analysis of the Temperature Characteristics of Three-Phase Coaxial Superconducting Power Cable according to a Liquid Nitrogen Circulation Method for Real-Grid Application in Korea

Analysis of the Temperature Characteristics of Three-Phase Coaxial Superconducting Power Cable according to a Liquid Nitrogen Circulation Method for Real-Grid Application in Korea

Test Results for a 25 Meter Prototype Fault Current Limiting HTS Cable for Project Hydra

Thermal Modeling of Helium Cooled High-Temperature Superconducting DC Transmission Cable

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