HTS wire consumption reduction in a coil with an actively controllable magnetic core for a fault current controller

Min Cheol Ahn, Jae Young Jang, Tae Kuk Ko

Research output: Contribution to journalArticle

Abstract

For an effective fault current management in a smart grid, a fault current controller (FCC) has been proposed and actively developed. A previous attempt to reduce the superconducting wire consumption in a high-temperature superconducting coil for the FCC was to use a reversely magnetized core (RMC) using permanent magnets. Despite the previous study being effective to shorten the wire, there were some potential drawbacks: a demagnetization of the permanent magnets and uncontrollability. In the smart grid with renewable sources, a nominal line current can be time-varying, so a reverse bias point should not be fixed. Therefore, an actively controllable RMC is required. In this paper, an electromagnet was applied for a source of RMC. A reverse-bias point was actively adjusted by taking account of time-varying line current. This proposed bias method could reduce wire consumption. With optimal reverse bias current, the effective inductance was 4.3 times larger than that of the air core case. If we want to make the same inductance without RMC, wire consumption should be more than 2.07 times. This proposed method was so effective to apply to the distribution class FCC, which is our final target.

Original languageEnglish
Article number6471187
JournalIEEE Transactions on Applied Superconductivity
Volume23
Issue number3
DOIs
Publication statusPublished - 2013 Apr 22

Fingerprint

Magnetic cores
magnetic cores
Electric fault currents
controllers
coils
wire
Wire
Controllers
line current
Inductance
Permanent magnets
permanent magnets
inductance
Superconducting wire
Demagnetization
Electromagnets
grids
Bias currents
electromagnets
demagnetization

All Science Journal Classification (ASJC) codes

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

Cite this

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abstract = "For an effective fault current management in a smart grid, a fault current controller (FCC) has been proposed and actively developed. A previous attempt to reduce the superconducting wire consumption in a high-temperature superconducting coil for the FCC was to use a reversely magnetized core (RMC) using permanent magnets. Despite the previous study being effective to shorten the wire, there were some potential drawbacks: a demagnetization of the permanent magnets and uncontrollability. In the smart grid with renewable sources, a nominal line current can be time-varying, so a reverse bias point should not be fixed. Therefore, an actively controllable RMC is required. In this paper, an electromagnet was applied for a source of RMC. A reverse-bias point was actively adjusted by taking account of time-varying line current. This proposed bias method could reduce wire consumption. With optimal reverse bias current, the effective inductance was 4.3 times larger than that of the air core case. If we want to make the same inductance without RMC, wire consumption should be more than 2.07 times. This proposed method was so effective to apply to the distribution class FCC, which is our final target.",
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HTS wire consumption reduction in a coil with an actively controllable magnetic core for a fault current controller. / Ahn, Min Cheol; Jang, Jae Young; Ko, Tae Kuk.

In: IEEE Transactions on Applied Superconductivity, Vol. 23, No. 3, 6471187, 22.04.2013.

Research output: Contribution to journalArticle

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