Geomagnetic storm environments and effects on electrical systems
- Tesche (F.M.), Dallas, TX (United States)
- Oak Ridge National Lab., TN (United States)
This paper briefly reviews the behavior of the earth`s magnetic field during a geomagnetic storm. Temporal variations of the B-field on the earths surface can induce an electric field in the earth, and this E-field will induce currents to flow in long, grounded conductors. Previous experience with geomagnetic storms indicates that such geomagnetically-induced currents can cause damage to power system components, and at times, can cause power blackouts. This paper presents some recently measured geomagnetic field variations, and illustrates how the induced electric field can be calculated, assuming a simple model of the imperfectly conducting earth. This calculation may be performed either in the time or in the frequency domain. Approximations to the time dependence of the geomagnetic field permit an analytical evaluation of the corresponding E-field in the earth, and this results in a simple expression for the transient Enfield. A knowledge of this Enfield is important in understanding the effects of geomagnetic storms on the power system, and in devising protection methods.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 10184446
- Report Number(s):
- CONF-930353-1; ON: DE92041257
- Resource Relation:
- Conference: 10. international Zurich symposium and technical exhibition on electromagnetic compatibility,Zurich (Switzerland),9-11 Mar 1993; Other Information: PBD: [1992]
- Country of Publication:
- United States
- Language:
- English
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