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Stable Overload Operation of High-Temperature Superconductor Protective Resistors

Abstract

The use of high-temperature superconductor (HTS) resistors to protect electrical equipment and ac networks from emergency short-circuit currents and single phase-to-ground faults has been considered. It has been proposed to use a stable overload operation in HTS composite wires to enhance the speed of response and thermal stability of HTS current-limiting devices. Design solutions for the use of stabilized low-resistance HTS wires in protective resistors for ac networks have been developed that increase the resistance inserted in the circuit by several orders of magnitude. The characteristics of first-generation HTS wires with high critical parameters in the resistive state have been measured in a wide current overload range. Prototypes of instantaneous thermally stable current-limiting devices with HTS protective resistors have been fabricated and tested. The design parameters of HTS protective resistors for use in electric power networks have been calculated.

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ACKNOWLEDGMENTS

We are grateful to V.M. Pudalov for ongoing support of the chosen direction in studying HTS materials and valuable comments during preparation of this study.

This study was carried out on the equipment of the Shared Facilities Center, Lebedev Physical Institute, Russian Academy of Sciences.

Funding

This study was supported by the Presidium of the Russian Academy of Sciences, Fundamental Research Program Fundamental Problems of High-Temperature Superconductivity, and the Russian Foundation for Basic Research, project no. 17-29-10003.

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Correspondence to V. A. Malginov.

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Translated by E. Bondareva

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Malginov, V.A., Malginov, A.V. & Fleishman, L.S. Stable Overload Operation of High-Temperature Superconductor Protective Resistors. Tech. Phys. 64, 1759–1766 (2019). https://doi.org/10.1134/S106378421912017X

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  • DOI: https://doi.org/10.1134/S106378421912017X