Experimental study on the barrier effects in gaseous helium for the insulation design of a high voltage SFCL

Hyoungku Kang, Jin Bae Na, Yoon Do Chung, Tae Kuk Ko

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

It has been widely established that gaseous helium (GHe) can be injected into a sub-cooled liquid nitrogen (LN2) cooling system to control the pressure of such a system because of its non-condensing characteristics. A sub-cooled LN2 cooling system is known as one of the most promising method to develop a large scale superconducting machine [1]. Unfortunately, the electrical breakdown voltage of GHe is not good enough for developing a high voltage electric machine such as a superconducting fault current limiter (SFCL). To enhance the dielectric characteristics of current leads placed in GHe, the use of solid barriers is regarded as an efficient method. In this study, experiments are made on the dielectric characteristics of GHe and the barrier effects and results are analyzed in order to improve the dielectric performance of a high voltage SFCL using a sub-cooled LN2 cooling system. The dielectric experiments of the energized sphere and the grounded plane in GHe are examined according to various pressures with a solid insulating barrier. The dielectric experiments are performed by installing barriers made of glass fiber reinforced plastics (GFRP) between two electrodes and the electrical breakdown voltage according to the pressure of GHe and the position of a barrier is observed. As a result, it is found that the position of a solid barrier and the pressure of GHe are important in enhancing the dielectric characteristics of a sphere-to-plane electrode system with quasi-uniform field.

Original languageEnglish
Article number5710669
Pages (from-to)1328-1331
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Volume21
Issue number3 PART 2
DOIs
Publication statusPublished - 2011 Jun 1

Fingerprint

Superconducting fault current limiters
Helium
insulation
Insulation
high voltages
helium
Electric potential
cooling systems
Cooling systems
Electric breakdown
electrical faults
glass fiber reinforced plastics
Glass fiber reinforced plastics
Electric machinery
Electrodes
electrodes
Experiments
electric potential
Liquid nitrogen
liquid nitrogen

All Science Journal Classification (ASJC) codes

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

Cite this

@article{63637c227f2a4463b9d94f7781016935,
title = "Experimental study on the barrier effects in gaseous helium for the insulation design of a high voltage SFCL",
abstract = "It has been widely established that gaseous helium (GHe) can be injected into a sub-cooled liquid nitrogen (LN2) cooling system to control the pressure of such a system because of its non-condensing characteristics. A sub-cooled LN2 cooling system is known as one of the most promising method to develop a large scale superconducting machine [1]. Unfortunately, the electrical breakdown voltage of GHe is not good enough for developing a high voltage electric machine such as a superconducting fault current limiter (SFCL). To enhance the dielectric characteristics of current leads placed in GHe, the use of solid barriers is regarded as an efficient method. In this study, experiments are made on the dielectric characteristics of GHe and the barrier effects and results are analyzed in order to improve the dielectric performance of a high voltage SFCL using a sub-cooled LN2 cooling system. The dielectric experiments of the energized sphere and the grounded plane in GHe are examined according to various pressures with a solid insulating barrier. The dielectric experiments are performed by installing barriers made of glass fiber reinforced plastics (GFRP) between two electrodes and the electrical breakdown voltage according to the pressure of GHe and the position of a barrier is observed. As a result, it is found that the position of a solid barrier and the pressure of GHe are important in enhancing the dielectric characteristics of a sphere-to-plane electrode system with quasi-uniform field.",
author = "Hyoungku Kang and Na, {Jin Bae} and Chung, {Yoon Do} and Ko, {Tae Kuk}",
year = "2011",
month = "6",
day = "1",
doi = "10.1109/TASC.2010.2104310",
language = "English",
volume = "21",
pages = "1328--1331",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3 PART 2",

}

Experimental study on the barrier effects in gaseous helium for the insulation design of a high voltage SFCL. / Kang, Hyoungku; Na, Jin Bae; Chung, Yoon Do; Ko, Tae Kuk.

In: IEEE Transactions on Applied Superconductivity, Vol. 21, No. 3 PART 2, 5710669, 01.06.2011, p. 1328-1331.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Experimental study on the barrier effects in gaseous helium for the insulation design of a high voltage SFCL

AU - Kang, Hyoungku

AU - Na, Jin Bae

AU - Chung, Yoon Do

AU - Ko, Tae Kuk

PY - 2011/6/1

Y1 - 2011/6/1

N2 - It has been widely established that gaseous helium (GHe) can be injected into a sub-cooled liquid nitrogen (LN2) cooling system to control the pressure of such a system because of its non-condensing characteristics. A sub-cooled LN2 cooling system is known as one of the most promising method to develop a large scale superconducting machine [1]. Unfortunately, the electrical breakdown voltage of GHe is not good enough for developing a high voltage electric machine such as a superconducting fault current limiter (SFCL). To enhance the dielectric characteristics of current leads placed in GHe, the use of solid barriers is regarded as an efficient method. In this study, experiments are made on the dielectric characteristics of GHe and the barrier effects and results are analyzed in order to improve the dielectric performance of a high voltage SFCL using a sub-cooled LN2 cooling system. The dielectric experiments of the energized sphere and the grounded plane in GHe are examined according to various pressures with a solid insulating barrier. The dielectric experiments are performed by installing barriers made of glass fiber reinforced plastics (GFRP) between two electrodes and the electrical breakdown voltage according to the pressure of GHe and the position of a barrier is observed. As a result, it is found that the position of a solid barrier and the pressure of GHe are important in enhancing the dielectric characteristics of a sphere-to-plane electrode system with quasi-uniform field.

AB - It has been widely established that gaseous helium (GHe) can be injected into a sub-cooled liquid nitrogen (LN2) cooling system to control the pressure of such a system because of its non-condensing characteristics. A sub-cooled LN2 cooling system is known as one of the most promising method to develop a large scale superconducting machine [1]. Unfortunately, the electrical breakdown voltage of GHe is not good enough for developing a high voltage electric machine such as a superconducting fault current limiter (SFCL). To enhance the dielectric characteristics of current leads placed in GHe, the use of solid barriers is regarded as an efficient method. In this study, experiments are made on the dielectric characteristics of GHe and the barrier effects and results are analyzed in order to improve the dielectric performance of a high voltage SFCL using a sub-cooled LN2 cooling system. The dielectric experiments of the energized sphere and the grounded plane in GHe are examined according to various pressures with a solid insulating barrier. The dielectric experiments are performed by installing barriers made of glass fiber reinforced plastics (GFRP) between two electrodes and the electrical breakdown voltage according to the pressure of GHe and the position of a barrier is observed. As a result, it is found that the position of a solid barrier and the pressure of GHe are important in enhancing the dielectric characteristics of a sphere-to-plane electrode system with quasi-uniform field.

UR - http://www.scopus.com/inward/record.url?scp=79957891372&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79957891372&partnerID=8YFLogxK

U2 - 10.1109/TASC.2010.2104310

DO - 10.1109/TASC.2010.2104310

M3 - Article

AN - SCOPUS:79957891372

VL - 21

SP - 1328

EP - 1331

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 3 PART 2

M1 - 5710669

ER -