Experimental study on the electrical breakdown characteristics of sub-cooled liquid nitrogen for designing a high voltage superconducting machine

Jin Bae Na; Hyoungku Kang; Young Jin Hwang; Seong Eun Yang; Dong Keun Park; Duck Kweon Bae; Tae Kuk Ko

doi:10.1109/TASC.2010.2041649

Experimental study on the electrical breakdown characteristics of sub-cooled liquid nitrogen for designing a high voltage superconducting machine

Jin Bae Na, Hyoungku Kang, Young Jin Hwang, Seong Eun Yang, Dong Keun Park, Duck Kweon Bae, Tae Kuk Ko

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The electrical breakdown characteristics of liquid nitrogen (LN ₂) should be investigated for developing of a high voltage superconducting machine. This paper deals with the experimental study for the verification of dielectric characteristics of sub-cooled LN₂ in accordance with utilization factors. AC dielectric experiments were carried out by using sphere-plane electrode systems. The utilization factors of simulated electrode systems were controlled by gap distance between two electrodes and diameter of a sphere electrode. Also, dielectric experiments according to various pressures, 1.25, 1.5 and 2 bar, by gaseous nitrogen were carried out. In this paper, the electrical breakdown criteria of sub-cooled LN₂ conditions are derived with various sphere diameters. In addition, the sub-cooled LN₂ condition and saturated LN₂ condition were compared with AC dielectric characteristics. Research results could be applicable to designing of high voltage superconducting applications such as superconducting fault limiters (SFCLs), cables and large-capacity transformers.

Original language	English
Article number	5438875
Pages (from-to)	1662-1666
Number of pages	5
Journal	IEEE Transactions on Applied Superconductivity
Volume	20
Issue number	3
DOIs	https://doi.org/10.1109/TASC.2010.2041649
Publication status	Published - 2010 Jun

Bibliographical note

Funding Information:
Manuscript received October 20, 2009. First published March 25, 2010; current version published May 28, 2010. This research was supported by the National Research Laboratory Program through the Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology (R0A-2007-000-20063-0).

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TASC.2010.2041649

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title = "Experimental study on the electrical breakdown characteristics of sub-cooled liquid nitrogen for designing a high voltage superconducting machine",

abstract = "The electrical breakdown characteristics of liquid nitrogen (LN 2) should be investigated for developing of a high voltage superconducting machine. This paper deals with the experimental study for the verification of dielectric characteristics of sub-cooled LN2 in accordance with utilization factors. AC dielectric experiments were carried out by using sphere-plane electrode systems. The utilization factors of simulated electrode systems were controlled by gap distance between two electrodes and diameter of a sphere electrode. Also, dielectric experiments according to various pressures, 1.25, 1.5 and 2 bar, by gaseous nitrogen were carried out. In this paper, the electrical breakdown criteria of sub-cooled LN2 conditions are derived with various sphere diameters. In addition, the sub-cooled LN2 condition and saturated LN2 condition were compared with AC dielectric characteristics. Research results could be applicable to designing of high voltage superconducting applications such as superconducting fault limiters (SFCLs), cables and large-capacity transformers.",

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note = "Funding Information: Manuscript received October 20, 2009. First published March 25, 2010; current version published May 28, 2010. This research was supported by the National Research Laboratory Program through the Korea Science and Engineering Foundation funded by the Ministry of Education, Science and Technology (R0A-2007-000-20063-0).",

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AU - Park, Dong Keun

AU - Bae, Duck Kweon

AU - Ko, Tae Kuk

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N2 - The electrical breakdown characteristics of liquid nitrogen (LN 2) should be investigated for developing of a high voltage superconducting machine. This paper deals with the experimental study for the verification of dielectric characteristics of sub-cooled LN2 in accordance with utilization factors. AC dielectric experiments were carried out by using sphere-plane electrode systems. The utilization factors of simulated electrode systems were controlled by gap distance between two electrodes and diameter of a sphere electrode. Also, dielectric experiments according to various pressures, 1.25, 1.5 and 2 bar, by gaseous nitrogen were carried out. In this paper, the electrical breakdown criteria of sub-cooled LN2 conditions are derived with various sphere diameters. In addition, the sub-cooled LN2 condition and saturated LN2 condition were compared with AC dielectric characteristics. Research results could be applicable to designing of high voltage superconducting applications such as superconducting fault limiters (SFCLs), cables and large-capacity transformers.

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Experimental study on the electrical breakdown characteristics of sub-cooled liquid nitrogen for designing a high voltage superconducting machine

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