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HV Transformer Protection and Stabilization under Geomagnetically Induced Currents

Author

Listed:
  • Daniel Bejmert

    (Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wrocław, Poland)

  • Klaus Boehme

    (Siemens AG, 13629 Berlin, Germany)

  • Matthias Kereit

    (Siemens AG, 13629 Berlin, Germany)

  • Waldemar Rebizant

    (Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wrocław, Poland)

Abstract

This paper presents the results of research related to the issues arising from DC excitation of power transformers due to geomagnetically induced currents (GIC). First, the GIC phenomena and their influence on power system operation are discussed. Then, a recorded case of tripping of the transformer differential protection due to geomagnetic disturbances (GD), as well as simulation signals from a developed model of a transformer subjected to a GD are analyzed. Next, two algorithms for GIC detection utilizing the rate of change of transformer differential currents and the DC component in the neutral current are proposed, thoroughly tested, and recommended.

Suggested Citation

  • Daniel Bejmert & Klaus Boehme & Matthias Kereit & Waldemar Rebizant, 2020. "HV Transformer Protection and Stabilization under Geomagnetically Induced Currents," Energies, MDPI, vol. 13(18), pages 1-13, September.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:18:p:4693-:d:410901
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