HV Transformer Protection and Stabilization under Geomagnetically Induced Currents

Energies

Daniel Bejmert¹  Waldemar Rebizant¹  Klaus Boehme²  Matthias Kereit² 

[1] Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50-370 Wrocław, Poland;Siemens AG, 13629 Berlin, Germany;

关键词: power transformer;    differential protection;    protection stabilization;    geomagnetically induced current;    geomagnetic disturbance;   

DOI  :  10.3390/en13184693

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown