Investigation on the electromagnetic transient of parallel transmission lines considering the interference from magnetic storms

The geomagnetic storms influence the operation of power systems, and do harm to the electrical equipment, and even lead to large-scale power outages. The purpose of this paper is to analysis the effect of geomagnetic storms on parallel transmission lines. In this paper, the coupled interference relationship of magnetic storms and transmission lines are analyzed. And the interference of magnetic storms on the regional power grid in low latitude with the coupling interference relationship is discussed. Finally, the influence law of magnetic storms on electromagnetic transient characteristics of AC/DC parallel transmission lines is researched based on AC/DC parallel transmission line model which considered the coupling interference.