Experimental analysis of unequal voltage distribution on a single YBCO coated conductor affected by inhomogeneous critical currents in liquid nitrogen and sub-cooled liquid nitrogen

Sung Yul Chu; Jae Young Jang; Sukjin Choi; Young Jae Kim; Ki Sung Chang; Tae Kuk Ko

doi:10.1109/TASC.2010.2091383

Experimental analysis of unequal voltage distribution on a single YBCO coated conductor affected by inhomogeneous critical currents in liquid nitrogen and sub-cooled liquid nitrogen

Sung Yul Chu, Jae Young Jang, Sukjin Choi, Young Jae Kim, Ki Sung Chang, Tae Kuk Ko

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Review article › peer-review

3 Citations (Scopus)

Abstract

To design a large scale superconducting fault current limiter (SFCL) for power grids, a single long-length YBCO coated conductor (CC) wire is preferred. However this single YBCO CC wire can cause a problem of unequal voltage distribution between the parts on the long wire at quench by the faults. Inhomogeneous critical current of the YBCO CCs in the SFCL is a possibility. Furthermore, sub-cooled liquid nitrogen (LN₂) condition is usually used to increase current capacity of the SFCL. However, this sub-cooled condition can worsen the inhomogeneity between the YBCO CCs. Therefore, it is important to understand the relation between the unequal voltage distribution and the inhomogeneous critical currents in the single long length YBCO CC. In this paper, experiments with the same single YBCO CC wire were conducted in various temperature conditions, LN₂ and sub-cooled LN₂. In both experiments, the critical currents and voltage distributions generated by faults at short-circuit tests were measured. It was observed that the inhomogeneous condition impacts on the unequal voltage distribution.

Original language	English
Article number	5669360
Pages (from-to)	2992-2996
Number of pages	5
Journal	IEEE Transactions on Applied Superconductivity
Volume	21
Issue number	3 PART 3
DOIs	https://doi.org/10.1109/TASC.2010.2091383
Publication status	Published - 2011 Jun

Bibliographical note

Funding Information:
Manuscript received August 03, 2010; accepted November 02, 2010. Date of publication December 17, 2010; date of current version May 27, 2011. This work was supported by the Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korea Government Ministry of Knowledge Economy (2007-P-EP-HM-E-08-0000).

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.2010.2091383

Cite this

Chu, S. Y., Jang, J. Y., Choi, S., Kim, Y. J., Chang, K. S., & Ko, T. K. (2011). Experimental analysis of unequal voltage distribution on a single YBCO coated conductor affected by inhomogeneous critical currents in liquid nitrogen and sub-cooled liquid nitrogen. IEEE Transactions on Applied Superconductivity, 21(3 PART 3), 2992-2996. [5669360]. https://doi.org/10.1109/TASC.2010.2091383

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title = "Experimental analysis of unequal voltage distribution on a single YBCO coated conductor affected by inhomogeneous critical currents in liquid nitrogen and sub-cooled liquid nitrogen",

abstract = "To design a large scale superconducting fault current limiter (SFCL) for power grids, a single long-length YBCO coated conductor (CC) wire is preferred. However this single YBCO CC wire can cause a problem of unequal voltage distribution between the parts on the long wire at quench by the faults. Inhomogeneous critical current of the YBCO CCs in the SFCL is a possibility. Furthermore, sub-cooled liquid nitrogen (LN2) condition is usually used to increase current capacity of the SFCL. However, this sub-cooled condition can worsen the inhomogeneity between the YBCO CCs. Therefore, it is important to understand the relation between the unequal voltage distribution and the inhomogeneous critical currents in the single long length YBCO CC. In this paper, experiments with the same single YBCO CC wire were conducted in various temperature conditions, LN2 and sub-cooled LN2. In both experiments, the critical currents and voltage distributions generated by faults at short-circuit tests were measured. It was observed that the inhomogeneous condition impacts on the unequal voltage distribution.",

author = "Chu, {Sung Yul} and Jang, {Jae Young} and Sukjin Choi and Kim, {Young Jae} and Chang, {Ki Sung} and Ko, {Tae Kuk}",

note = "Funding Information: Manuscript received August 03, 2010; accepted November 02, 2010. Date of publication December 17, 2010; date of current version May 27, 2011. This work was supported by the Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korea Government Ministry of Knowledge Economy (2007-P-EP-HM-E-08-0000).",

year = "2011",

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doi = "10.1109/TASC.2010.2091383",

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Chu, SY, Jang, JY, Choi, S, Kim, YJ, Chang, KS & Ko, TK 2011, 'Experimental analysis of unequal voltage distribution on a single YBCO coated conductor affected by inhomogeneous critical currents in liquid nitrogen and sub-cooled liquid nitrogen', IEEE Transactions on Applied Superconductivity, vol. 21, no. 3 PART 3, 5669360, pp. 2992-2996. https://doi.org/10.1109/TASC.2010.2091383

Experimental analysis of unequal voltage distribution on a single YBCO coated conductor affected by inhomogeneous critical currents in liquid nitrogen and sub-cooled liquid nitrogen. / Chu, Sung Yul; Jang, Jae Young; Choi, Sukjin et al.
In: IEEE Transactions on Applied Superconductivity, Vol. 21, No. 3 PART 3, 5669360, 06.2011, p. 2992-2996.

Research output: Contribution to journal › Review article › peer-review

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T1 - Experimental analysis of unequal voltage distribution on a single YBCO coated conductor affected by inhomogeneous critical currents in liquid nitrogen and sub-cooled liquid nitrogen

AU - Chu, Sung Yul

AU - Jang, Jae Young

AU - Choi, Sukjin

AU - Kim, Young Jae

AU - Chang, Ki Sung

AU - Ko, Tae Kuk

N1 - Funding Information: Manuscript received August 03, 2010; accepted November 02, 2010. Date of publication December 17, 2010; date of current version May 27, 2011. This work was supported by the Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) Grant funded by the Korea Government Ministry of Knowledge Economy (2007-P-EP-HM-E-08-0000).

PY - 2011/6

Y1 - 2011/6

N2 - To design a large scale superconducting fault current limiter (SFCL) for power grids, a single long-length YBCO coated conductor (CC) wire is preferred. However this single YBCO CC wire can cause a problem of unequal voltage distribution between the parts on the long wire at quench by the faults. Inhomogeneous critical current of the YBCO CCs in the SFCL is a possibility. Furthermore, sub-cooled liquid nitrogen (LN2) condition is usually used to increase current capacity of the SFCL. However, this sub-cooled condition can worsen the inhomogeneity between the YBCO CCs. Therefore, it is important to understand the relation between the unequal voltage distribution and the inhomogeneous critical currents in the single long length YBCO CC. In this paper, experiments with the same single YBCO CC wire were conducted in various temperature conditions, LN2 and sub-cooled LN2. In both experiments, the critical currents and voltage distributions generated by faults at short-circuit tests were measured. It was observed that the inhomogeneous condition impacts on the unequal voltage distribution.

AB - To design a large scale superconducting fault current limiter (SFCL) for power grids, a single long-length YBCO coated conductor (CC) wire is preferred. However this single YBCO CC wire can cause a problem of unequal voltage distribution between the parts on the long wire at quench by the faults. Inhomogeneous critical current of the YBCO CCs in the SFCL is a possibility. Furthermore, sub-cooled liquid nitrogen (LN2) condition is usually used to increase current capacity of the SFCL. However, this sub-cooled condition can worsen the inhomogeneity between the YBCO CCs. Therefore, it is important to understand the relation between the unequal voltage distribution and the inhomogeneous critical currents in the single long length YBCO CC. In this paper, experiments with the same single YBCO CC wire were conducted in various temperature conditions, LN2 and sub-cooled LN2. In both experiments, the critical currents and voltage distributions generated by faults at short-circuit tests were measured. It was observed that the inhomogeneous condition impacts on the unequal voltage distribution.

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Experimental analysis of unequal voltage distribution on a single YBCO coated conductor affected by inhomogeneous critical currents in liquid nitrogen and sub-cooled liquid nitrogen

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