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Research on Current Sharing in Parallel of Resistive Type Superconducting Fault Current Limiter

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Abstract

Superconducting fault current limiters are highly effective solutions to reduce and control excessive fault current which is inevitable in electric power systems. Resistive type superconducting fault current limiter (RSFCL) is used in parallel by multiple superconducting units, but there is a problem of uneven current distribution in parallel, which seriously affects its reliability and safety. In order to explore the problem of current sharing in parallel and find out the law of current distribution, a series of experiments are designed to verify it. Experimental research has found that whether in the steady state or the transient state, the more the superconducting units are connected in parallel, the smaller the current difference is, but it does not mean that the current sharing is better. This paper introduces a new evaluation model of current sharing, which evaluates the current sharing effect of different numbers of parallel situations in various states, and finds the law of current sharing, which provides a reference for application research of the subsequent.

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Funding

This work was supported in part by National Key R&D project under grant 2018YFA0704203 and the National Natural Science Foundation of China (51721005).

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Authors and Affiliations

  1. Key Laboratory of Applied Superconductivity, Beijing, 100190, China

    Shaoqun Cao, Jingye Zhang & Liwei Jing

  2. Institute of Electrical Engineering Chinese Academy of Sciences, Beijing, 100190, China

    Shaoqun Cao, Jingye Zhang & Liwei Jing

  3. University of Chinese Academy of Sciences, Beijing, 100190, China

    Shaoqun Cao

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  1. Shaoqun Cao
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  2. Jingye Zhang
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  3. Liwei Jing
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Correspondence to Jingye Zhang.

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Cao, S., Zhang, J. & Jing, L. Research on Current Sharing in Parallel of Resistive Type Superconducting Fault Current Limiter. J Supercond Nov Magn 33, 1955–1965 (2020). https://doi.org/10.1007/s10948-020-05457-7

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  • DOI: https://doi.org/10.1007/s10948-020-05457-7

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