Journal Information
Journal Information

   Editorial Board
   Guide for Authors

Contents Services
Contents Services

   Regular Issues
   Special Issues
   Authors Index


   FEI STU Bratislava    deGruyter-Sciendo


[1, 2019] 

Journal of Electrical Engineering, Vol 70, 1 (2019) 69-73 DOI: 10.2478/jee-2019-0010

Direct currents in power transformers

Milan Stork – Daniel Mayer

   The article is devoted to the physical nature of geomagnetism, magnetic storms and methods of predicting their origin and deals with geomagnetic induced currents called GIC (Geomagnetically Induced Currents) and their effect on power transformers. A simplified, single-phase transmission system is described mathematically and its analysis was performed. Also the phenomenon of periodic semi-saturation of the magnetic circuit of the transformers resulting in current overload of the transformer windings, which can lead to thermal damage of the windings is explained. In addition, there is a significant deformation of the currents in the electrical system. The numerical solution of the system was verified by measurement on an electrical model.

Keywords: geomagnetic field, coronal mass ejection, geomagnetically induced current, non-linear transformer, magnetic semi-saturation


© 1997-2022  FEI STU Bratislava