Surface electric fields and geomagnetically inducedudcurrents in the Scottish Power grid duringudthe 30 October 2003 geomagnetic storm

摘要

A surface electric field model is used to estimate the UK surface E field during the 30 October 2003udsevere geomagnetic storm. This model is coupled with a power grid model to determine the flow ofudgeomagnetically induced currents (GIC) through the Scottish part of the UK grid. Model data areudcompared with GIC measurements at four sites in the power network. During this storm, measured andudmodeled GIC levels exceeded 40 A, and the surface electric field reached 5 V/km at sites in the UnitedudKingdom (compared with quiet-time levels of less than 0.1 V/km). The electric field and grid models nowudform part of a GIC monitoring, analysis, and warning software package with Web interface, developed foruduse by the grid operator. This package also contains a daily geomagnetic activity forecast service, a solarudwind shock detector for geomagnetic storm warning, and a near-real-time geomagnetic data stream forudstorm monitoring.