A study on thickness effect of HTS cable for insulation design

Cheon, Hyeon-Gweon; Kwag, Dong-Soon; Choi, Jaehoon; Kim, H J; Cho, J W; Kim, S H

doi:10.1088/1742-6596/43/1/217

Cited by 10 publications

(6 citation statements)

References 4 publications

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“…On the basis of the experimental results shown in this study and those presented by other researchers [5,16,17], the mechanism behind breakdown in PPLP/Kraft composite insulation is proposed as follows. The breakdown begins in the butt-gap of the 1 st layer because of partial discharges (PD) as shown in Figure 7a [16].…”

Section: Suggested Mechanism For the Breakdown In Pplp/kraft Composit...mentioning

confidence: 62%

Breakdown Characteristics of Composite Insulation for High Temperature Superconducting Cable

Dung,

Truong

2021

MaP

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Polypropylene laminated paper (PPLP) and Kraft paper have been studied as multi-layer insulation for high temperature superconducting cable. The experiment was examined with AC and impulse voltages. Short-term and long-term breakdown of insulation samples were investigated. It was found from the experimental results that the breakdown voltage becomes smaller in the order of PPLP, PPLP/Kraft and Kraft, but the lifetime index increases with the presence of Kraft layer in the multi-layer insulation. In addition, the position of PPLP layers has a significant effect on the breakdown voltage of PPLP/Kraft samples under positive impulse voltage. Finally, breakdown mechanism of PPLP/Kraft composite insulation was suggested. Partial discharges in butt-gaps and in the porous structure of insulation layers combined with electric discharges on the surface of these layers are considered to be main factors causing the puncture of multi-layer insulation.

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Section: Suggested Mechanism For the Breakdown In Pplp/kraft Composit...mentioning

confidence: 62%

Breakdown Characteristics of Composite Insulation for High Temperature Superconducting Cable

Dung,

Truong

2021

MaP

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“…For example, the breakdown voltage of multi-layered of laminated polypropylene (LPP) reduces with increasing the number of LPP layers if butt-gap is considered. Therefore, it is necessary to study the process of changing the breakdown voltage in multilayer insulation based on the number of layers 57 .…”

Section: Iva Superconducting Cablementioning

confidence: 99%

Insulation Materials and Systems for Superconducting Powertrain Devices in Future Cryo-Electrified Aircraft: Part I—Material Challenges and Specifications, and Device-Level Application

Yazdani-Asrami

Seyyedbarzegar

Zhang

et al. 2022

IEEE Electr. Insul. Mag.

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Superconducting technology for aerospace application is enabled by emerging development around hydrogen cooled electrically powered aircraft, aiming at zero-emission aviation. Superconductors, typically in the form of tape or wire in a composite architecture, can not only carry current density which is over 100 times that of copper and aluminium, but are also characterized by much lower losses. This property of superconductors makes them good candidates for the fabrication of superconducting devices of high specific power density, i.e. lower size and lighter weight, which is critical for aerospace applications. Superconductors, like any other conductors, require standard insulation to function safely and reliably in the electrical apparatus of aircraft, especially due to the special architecture, operating temperature, and operating condition of superconducting apparatus at high altitude. Extra attention should be drawn to choose proper insulating materials for such applications. In this paper, the challenges and considerations for choosing insulating materials for superconducting devices in cryo-electrified aircraft are reviewed and discussed.

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“…All sensitivities in these charts assume 11.2 MW nominal power capacity, a maximum allowable magnetic field of 0.5T from an inductive coil with a minimum allowable inductor coil diameter of 5cm. The superconducting material is assumed to be BSCCO operating in liquid nitrogen and the electric insulation is assumed to be laminated polypropylene paper with a dielectric strength of 50 kV/mm [31]. The number of windings and the diameter of the inductive coil are varied for each sample point to minimize the overall component mass.…”

Section: Fault-current Limiter and Circuit Breaker Trade Studymentioning

confidence: 99%

Turboelectric Distributed Propulsion Protection System Design Trades

Ross¹,

Armstrong²,

Blackwelder³

et al. 2014

SAE Technical Paper Series

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The Turboelectric Distributed Propulsion (TeDP) concept uses gas turbine engines as prime movers for generators whose electrical power is used to drive motors and propulsors. For this NASA N3-X study, the motors, generators, and DC transmission lines are superconducting, and the power electronics and circuit breakers are cryogenic to maximize efficiency and increase power density of all associated components. Some of the protection challenges of a superconducting DC network are discussed such as low natural damping, superconducting and quenched states, and fast fault response time. For a given TeDP electrical system architecture with fixed power ratings, solid-state circuit breakers combined with superconducting fault-current limiters are examined with current-source control to limit and interrupt the fault current. To estimate the protection system weight and losses, scalable models of cryogenic bidirectional currentsource converters, cryogenic bidirectional IGBT solid-state circuit breakers (CBs), and resistive-type superconducting fault current limiters (SFCLs) are developed to assess how the weight and losses of these components vary as a function of nominal voltage and current and fault current ratings. The scalable models are used to assess the protection system weight for several trade-offs. System studies include the tradeoff in fault-current limiting capability of SFCLs on CB mass, alongside the fault-current limiting capability of the converter and its impact on CB fault-current interruption ratings and weight.

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A study on thickness effect of HTS cable for insulation design

Cited by 10 publications

References 4 publications

Breakdown Characteristics of Composite Insulation for High Temperature Superconducting Cable

Breakdown Characteristics of Composite Insulation for High Temperature Superconducting Cable

Insulation Materials and Systems for Superconducting Powertrain Devices in Future Cryo-Electrified Aircraft: Part I—Material Challenges and Specifications, and Device-Level Application

Turboelectric Distributed Propulsion Protection System Design Trades

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