Direct currents in power transformers
Autor: | Milan Stork, Daniel Mayer |
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Rok vydání: | 2019 |
Předmět: |
Physics
magnetic semi-saturation 020209 energy 020208 electrical & electronic engineering 02 engineering and technology Transmission system Mechanics geomagnetically induced current law.invention Geomagnetically induced current Magnetic circuit Electric power system Earth's magnetic field Electromagnetic coil law geomagnetic field Physics::Space Physics 0202 electrical engineering electronic engineering information engineering Current (fluid) Transformer non-linear transformer coronal mass ejection |
Zdroj: | Journal of Electrical Engineering. 70:69-73 |
ISSN: | 1339-309X |
DOI: | 10.2478/jee-2019-0010 |
Popis: | 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. |
Databáze: | OpenAIRE |
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