DC Surface Flashover Characteristics of Insulation Film in LN2 and Bubbles Composite

Lei Gao; Bin Xiang; Muhammad Junaid; Hongxu Li; Zhiyuan Liu; Yingsan Geng; Jianhua Wang; Xiaoze Pei; Youping Tu

doi:10.1109/ASEMD49065.2020.9276320

DC Surface Flashover Characteristics of Insulation Film in LN2 and Bubbles Composite

Lei Gao, Bin Xiang, Muhammad Junaid, Hongxu Li, Zhiyuan Liu, Yingsan Geng, Jianhua Wang, Xiaoze Pei, Youping Tu

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

1 Citation (SciVal)

Abstract

A combination of resistive type superconducting fault current limiters (R-SFCLs) and mechanical-type DC circuit breaker is a reliable way to protect the medium voltage and high voltage DC systems. Using the insulation barrier plays an important role in enhancing the insulation strength of R-SFCL. It promotes the development of R-SFCLs to a higher voltage level. However, the bubbles effect on the DC flashover characteristics of the insulation barrier is unknown. The objective of this paper is to obtain the DC flashover characteristics of insulation film with and without bubbles in liquid nitrogen (LN2). In the experiments, a triangle-plane electrode was put horizontal and immersed in LN2. A 14 W heater was placed right below the gap of two electrodes. Negative flashover characteristics of PTFE and Kapton were studied with different gap distances. The results show that the negative flashover voltage of PTFE film increases with the increase of gap distance both in conditions with and without bubbles. The shorter the gap distance between the triangle and plane electrodes is, the stronger the influence of bubbles on the negative flashover voltage is. The flashover voltage of PTFE is 1.15 times of Kapton both in the conditions with and without bubbles. The results could be used to design the insulation structure of high voltage R-SFCLs.

Original language	English
Title of host publication	2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020
Place of Publication	U. S. A.
Publisher	IEEE
ISBN (Electronic)	9781728152158
DOIs	https://doi.org/10.1109/ASEMD49065.2020.9276320
Publication status	Published - 16 Oct 2020
Event	2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020 - Virtual, Tianjin, China Duration: 16 Oct 2020 → 18 Oct 2020

Publication series

Name	2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020

Conference

Conference	2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020
Country/Territory	China
City	Virtual, Tianjin
Period	16/10/20 → 18/10/20

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China (No. 51907153, 51877166, 51911530195) and the China Postdoctoral Science Foundation Funded Project (No. 2019M653632) and the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(Grant No.LAPS20008)

Funding

This work was supported by the National Natural Science Foundation of China (No. 51907153, 51877166, 51911530195) and the China Postdoctoral Science Foundation Funded Project (No. 2019M653632) and the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(Grant No.LAPS20008)

Keywords

bubbles
DC flashover voltage
insulation film
LN2
R-SFCL

ASJC Scopus subject areas

Energy Engineering and Power Technology
Electrical and Electronic Engineering
Mechanical Engineering
Electronic, Optical and Magnetic Materials

Access to Document

10.1109/ASEMD49065.2020.9276320

Cite this

Gao, L., Xiang, B., Junaid, M., Li, H., Liu, Z., Geng, Y., Wang, J., Pei, X., & Tu, Y. (2020). DC Surface Flashover Characteristics of Insulation Film in LN2 and Bubbles Composite. In 2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020 Article 9276320 (2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020). IEEE. https://doi.org/10.1109/ASEMD49065.2020.9276320

DC Surface Flashover Characteristics of Insulation Film in LN2 and Bubbles Composite. / Gao, Lei; Xiang, Bin; Junaid, Muhammad et al.
2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020. U. S. A.: IEEE, 2020. 9276320 (2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020).

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

Gao, L, Xiang, B, Junaid, M, Li, H, Liu, Z, Geng, Y, Wang, J, Pei, X & Tu, Y 2020, DC Surface Flashover Characteristics of Insulation Film in LN2 and Bubbles Composite. in 2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020., 9276320, 2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020, IEEE, U. S. A., 2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020, Virtual, Tianjin, China, 16/10/20. https://doi.org/10.1109/ASEMD49065.2020.9276320

Gao L, Xiang B, Junaid M, Li H, Liu Z, Geng Y et al. DC Surface Flashover Characteristics of Insulation Film in LN2 and Bubbles Composite. In 2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020. U. S. A.: IEEE. 2020. 9276320. (2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020). doi: 10.1109/ASEMD49065.2020.9276320

Gao, Lei ; Xiang, Bin ; Junaid, Muhammad et al. / DC Surface Flashover Characteristics of Insulation Film in LN2 and Bubbles Composite. 2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020. U. S. A. : IEEE, 2020. (2020 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2020).

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abstract = "A combination of resistive type superconducting fault current limiters (R-SFCLs) and mechanical-type DC circuit breaker is a reliable way to protect the medium voltage and high voltage DC systems. Using the insulation barrier plays an important role in enhancing the insulation strength of R-SFCL. It promotes the development of R-SFCLs to a higher voltage level. However, the bubbles effect on the DC flashover characteristics of the insulation barrier is unknown. The objective of this paper is to obtain the DC flashover characteristics of insulation film with and without bubbles in liquid nitrogen (LN2). In the experiments, a triangle-plane electrode was put horizontal and immersed in LN2. A 14 W heater was placed right below the gap of two electrodes. Negative flashover characteristics of PTFE and Kapton were studied with different gap distances. The results show that the negative flashover voltage of PTFE film increases with the increase of gap distance both in conditions with and without bubbles. The shorter the gap distance between the triangle and plane electrodes is, the stronger the influence of bubbles on the negative flashover voltage is. The flashover voltage of PTFE is 1.15 times of Kapton both in the conditions with and without bubbles. The results could be used to design the insulation structure of high voltage R-SFCLs. ",

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AU - Geng, Yingsan

AU - Wang, Jianhua

AU - Pei, Xiaoze

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AB - A combination of resistive type superconducting fault current limiters (R-SFCLs) and mechanical-type DC circuit breaker is a reliable way to protect the medium voltage and high voltage DC systems. Using the insulation barrier plays an important role in enhancing the insulation strength of R-SFCL. It promotes the development of R-SFCLs to a higher voltage level. However, the bubbles effect on the DC flashover characteristics of the insulation barrier is unknown. The objective of this paper is to obtain the DC flashover characteristics of insulation film with and without bubbles in liquid nitrogen (LN2). In the experiments, a triangle-plane electrode was put horizontal and immersed in LN2. A 14 W heater was placed right below the gap of two electrodes. Negative flashover characteristics of PTFE and Kapton were studied with different gap distances. The results show that the negative flashover voltage of PTFE film increases with the increase of gap distance both in conditions with and without bubbles. The shorter the gap distance between the triangle and plane electrodes is, the stronger the influence of bubbles on the negative flashover voltage is. The flashover voltage of PTFE is 1.15 times of Kapton both in the conditions with and without bubbles. The results could be used to design the insulation structure of high voltage R-SFCLs.

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DC Surface Flashover Characteristics of Insulation Film in LN2 and Bubbles Composite

Abstract

Publication series

Conference

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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