Helium Gas Cooled and Insulated Superconducting Coaxial Dipole Cable for Electric Transport

Telikapalli, Srikar; Cheetham, Peter; Kim, Chul Han; Pamidi, Sastry

doi:10.1109/tdei.2023.3269008

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…The interdependence of the electrical and cryogenic thermal properties of HTS power cables requires the selection of a suitable cryogen to achieve the required operating temperature that influences the highest allowed voltage and current. Gaseous helium-cooled cables are preferred for electric transport platforms [9]. Gaseous helium (GHe) provides an extended temperature range, spanning from 4-80 K, IOP Publishing doi:10.1088/1757-899X/1302/1/012015 2 surpassing the limited operational temperature range of 64-80 K, possible with liquid nitrogen (LN2) [10].…”

Section: Introductionmentioning

confidence: 99%

Isolating electrical and cryogen flow for safe operation and design validation experimentation of HTS power cables for electric transportation

Mensah,

Cheetham,

Pamidi

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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The need for protecting the cryogenic infrastructure during a fault in high-temperature superconducting (HTS) power distribution systems of electric transport platforms is highlighted. A dual grounding scheme with an isolator between the electrical and cryogen flow paths of HTS power cables is needed. Finite element analysis of the electric field distribution of the vacuum jacketed isolator showed electric field intensity at the triple points. The electric field intensity at the triple points is reasonable if high vacuum quality is maintained. There is a need for further investigations for design validation with experimentation of practical designs for effective isolation and protection of cryogenic infrastructure from damage during an electrical fault in a section of the power distribution network of electrical transport platforms, such as an electric aircraft or ship.

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Section: Introductionmentioning

confidence: 99%

Isolating electrical and cryogen flow for safe operation and design validation experimentation of HTS power cables for electric transportation

Mensah,

Cheetham,

Pamidi

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Performance enhancements of HTS power cables by minimizing the electric field enhancements for electric transport applications

Mullings,

Mensah,

Das

et al. 2024

Supercond. Sci. Technol.

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Design innovations to manage the electric field enhancements and successful use of cryogenic epoxy EP37 as electrical insulation for high temperature superconducting (HTS) cables for electric aircraft applications are reported. Detailed finite element analysis (FEA) of the electric field distribution shows that the highest electric field is at the interface of the ground and electrical insulation layers. The FEA led to the design, fabrication, and experimental characterization of four model cables with stress cones and a direct bond of the ground and insulation layers. Enhanced partial discharge inception voltage (PDIV) was achieved in the model cables by minimizing the electric field enhancements at the ground layer interface. Using a helium gas mixture with 4 mol% H2, with higher intrinsic dielectric strength than pure helium, further enhanced the PDIV. The results warrant further studies on long HTS cables with EP37 as electrical insulation with a direct bond between the insulation and ground layers.

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Electrical Conductivity Measurement of Dielectric Materials at Cryogenic Temperatures

Das,

Guvvala,

Pamidi

et al. 2024

2024 IEEE Electrical Insulation Conference (EIC)

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Helium Gas Cooled and Insulated Superconducting Coaxial Dipole Cable for Electric Transport

Cited by 4 publications

References 24 publications

Isolating electrical and cryogen flow for safe operation and design validation experimentation of HTS power cables for electric transportation

Isolating electrical and cryogen flow for safe operation and design validation experimentation of HTS power cables for electric transportation

Performance enhancements of HTS power cables by minimizing the electric field enhancements for electric transport applications

Electrical Conductivity Measurement of Dielectric Materials at Cryogenic Temperatures

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