Protection of power transformers against geomagnetically induced currents

Abstract

The article examines the problem of saturation and failure of power transformers under geomagnetically induced currents and currents of the E3 component of high-altitude nuclear explosions. It also describes a special protective relay reacting on DC component in the transformer neutral current.

Keywords

• solar storm
• magnetosphere
• geomagnetic induced current
• ionosphere
• transformer saturation
• relay protection