A Case Study on Effect of Geomagnetically Induced Current in Power Transmission

Abstract

As a result of space weather events, geomagnetically induced currents (GIC) emerge in the power system. These low-frequency currents in the power supply can be thought of as quasi-DC currents. A half-cycle periodic saturation of the core occurs when a DC enters a power transformer. Heating, harmonics, and reactive power losses arise from periodic core saturation. A detailed understanding of power transformer design and performance to determine the exact effect of GIC on power transformers. The paper also provides a succinct explanation of the causes of transformer failure/overheating that have been linked to GIC currents in the published literature. The research shows that, due to the nature of GIC currents, even large levels of GIC would not cause much overheating or damage to the vast majority of power transformers. If subjected to high levels of GIC, only a few specific transformers may experience winding damage due to high winding circulation currents. The report also discusses the underlying problem with GIC, which is the narrow pulse of magnetizing current that occurs when transformer cores are subjected to part-cycle, semi-saturation. We designed or provided such filter to reduce this produced Dc voltages and give Deficient output which is introduced by studying various reviews on GIC in power system transformer by adding GIC effect on the transformer which will add mutually induced DC voltages which does not give proper output as introduces input so we designed or provided such filter to reduce this produced Dc voltages and give Deficient output which is introduced by adding GIC effect on transformer by adding GIC effect on the transformer which will add mutually induced DC voltages which does not give proper output It produces high-quality output and increases the reliability of the system.