Research and Assessments of Geomagnetically Induced Currents

Abstract

The geomagnetic storm which is caused by the sun's activity is a global natural disaster. When the sun surface activity is exuberant, especially in sun spots period, the surface of the sun will release X-ray, ultraviolet, visible and high-energy proton or electron beam. Part of the charged particles form current and influence the earth's magnetic field, current shock caused severe change occurs, geomagnetic happens. it can induce Geomagnetically induced currents (GIC).The GIC has very big effect on various man-made long distance conductors. The electric field produced during a geomagnetic disturbance is dependent on the magnitude and frequency of magnetic field variations and the Earth’s surface impedance. The GIC in a conductor system is also related to the infrastructure of the system. This paper introduces the principle of GIC, algorithm method and the geomagnetic storms rules.