Modeling & Mitigation of Geomagnetically Induced Currents (GICs) for Single-Phase Power Transformer

Abstract

This paper describes the effect of Geomagnetically Induced Currents (GICs) in single phase-transformer and how to mitigation the phenomena using capacitor at the ground for the transformer, Geomagnetically Induced Currents (GICs) arise from fluctuations in Earth’s magnetic field and can reach alarmingly high levels and cause malfunctions or blackouts in the power grids in which they occur. Under GICs the transformer core suffers a half-cycle saturation its leads to disturbances in the power system, also the design of transformer its impact by GICs. GICs cause some problem in power transformers like heating, burning winding, reactive power consumption and increase odd and even harmonics. Capacitor eliminate the GIC, MATLAB-SIMULINK used to simulate the single-phase transformer.