Insulation Characteristics of Dielectric Material for CD HTS Cable

Peng, Chang; Wang, Yinshun; Dai, Shaotao; Yang, Quan; Liu, Mingchuang; Chen, Hao; Wang, Menghan; Hu, Yidan

doi:10.1109/tasc.2018.2885780

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…Compared to Kraft paper, PPLP shows a significantly higher breakdown voltage under both AC and impulse voltages. This is in agreement with what reported in references [5,6,8,11]. This result could confirm the fact that the corona-proof of PPLP is higher than that of Kraft paper.…”

Section: Kraft Paper and Pplpsupporting

confidence: 93%

“…In addition, the breakdown strength of PPLP was observed to be higher than that of Kraft paper, but its lifetime index is smaller than that of Kraft paper [5,6]. The studies on the use of PPLP as ________ tape insulation for HTS cable were carried out [7,8]. Nevertheless, the comparison among PPLP, Kraft and PPLP/Kraft samples for both short-term and long-term breakdowns has not been investigated sufficiently.…”

Section: Introductionmentioning

confidence: 99%

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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: Kraft Paper and Pplpsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Breakdown Characteristics of Composite Insulation for High Temperature Superconducting Cable

Dung,

Truong

2021

MaP

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“…Liquid nitrogen (LN 2 ) has good dielectric and insulation performance. At the same time, various types of low-temperature insulation films have also been used in multiple superconducting power devices, which provided a reference for the insulation design of 6.6 MVA HTSTT [22][23][24]. Fourth, depending on the development of refrigeration technology, we have completed a refrigeration design meeting the small size and lightweight requirements.…”

Section: Introductionmentioning

confidence: 99%

Design, development, and testing of a 6.6 MVA HTS traction transformer for high-speed train applications

Zhao

Fang

Jiang

et al. 2023

Supercond. Sci. Technol.

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High-temperature superconducting traction transformers (HTSTT) have the merits of small size and lightweight in comparison with their conventional counterparts. This article reports the development progress of a 6.6 MVA HTSTT operating at 65 K, including the design, testing, and system cooling. The introduction of flux diverters and an optimized winding design realized a short-circuit impedance higher than 43% and AC loss less than 3 kW. The insulation structure was designed to pass insulation tests specified in standard in China GB/T 25120-2010. An open cooling system with reduced pressure was developed, which realized the efficiency of the 6.6 MVA HTSTT above 99%. Before assembling the prototype transformer, we conducted tests for critical current and dielectric performance of the HTS double pancake coils (DPC) used in high-voltage (HV) and low- voltage (LV) windings to verify the current-carrying and insulation performances of each DPC. Finally, we measured the critical current and no-load loss of the HTSTT prototype at 77 K. Test results showed that the mass of the transformer is 33% less than conventional transformers. At 77 K, the critical current of the LV winding and HV winding is higher than 700 A and 50 A, respectively. Moreover, the HTSTT on a no-load test reached the test voltage of 25,000 V and loss of 6 kW. In the next step, we will continue to conduct experimental research, and verify the feasibility of the HTSTT on the train, and develop a circulating cooling system, all meeting the commercial requirements of the HTSTT. 

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“…High dielectric materials are widely used in various fields, mainly including the following aspects: used as embedded capacitors in the field of microelectronics 2,3 ; used in the production of cable joints, terminals, and protective layers in the power industry 4,5 ; used as a dielectric elastic material in the fields of energy storage and biomimetic technology. 6,7 The development of electronic information technology has led to the miniaturization of electronic components, further promoting the development and application of dielectric materials.…”

mentioning

confidence: 99%

Progress in preparation, processing, and application of high dielectric polypropylene matrix composite materials

Tao,

Yan,

Zhang

et al. 2024

Polymer Composites

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Currently, in the era of highly advanced information technology, dielectric materials exhibit extensive potential applications in the realms of energy storage and information transmission. Polypropylene stands as one of the most prevalent plastics, lauded for its exceptional mechanical, thermal, electrical, and processing attributes. This article expounds upon the intricate essence and energy storage principles underpinning dielectric materials while pinpointing the areas in which the current dielectric materials necessitate enhancements. It further delves into the study's selection of polypropylene as the base material, with a focus on the impact of individual fillers (ferroelectric ceramics, carbon materials, etc.) and mixed filler nanoparticles on augmenting the dielectric properties of polypropylene. We also delve into pertinent fabrication techniques and methodologies, such as the solution blending method, melt blending method, and in situ polymerization method. In the context of existing polypropylene‐based composite dielectric materials, this article introduces two quintessential applications: insulation materials for direct current cables and metal capacitor films. Finally, it concludes by summarizing the obstacles and challenges that high‐performance polypropylene‐based dielectric composites confront and offers insights into potential avenues for future research.

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Insulation Characteristics of Dielectric Material for CD HTS Cable

Cited by 9 publications

References 4 publications

Breakdown Characteristics of Composite Insulation for High Temperature Superconducting Cable

Breakdown Characteristics of Composite Insulation for High Temperature Superconducting Cable

Design, development, and testing of a 6.6 MVA HTS traction transformer for high-speed train applications

Progress in preparation, processing, and application of high dielectric polypropylene matrix composite materials

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