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Geomagnetically induced currents (GICs) can cause half cycle saturation of transformers and consequently affect the power grid with harmonics and reactive power losses. To effectively mitigate the negative GIC impacts in large-scale power systems, the present paper considers the problem of placing blocking devices in transformer neutrals. The placement problem of multiple blocking devices is first...
Geomagnetically induced currents (GICs), caused by geomagnetic disturbances (GMDs) (Figure 1), have the potential to affect the operation of interconnected electric power systems. There are two key risks associated with GICs in the bulk electric system. The first is the potential for physical damage to transmission system devices such as high-voltage (HV) transformers. The second is the loss of reactive...
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