modelling of geomagnetic induction in pipelines

Clicks: 122
ID: 190962
2002
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Abstract
Geomagnetic field variations induce telluric currents in pipelines, which modify the electrochemical conditions at the pipe/soil interface, possibly contributing to corrosion of the pipeline steel. Modelling of geomagnetic induction in pipelines can be accomplished by combining several techniques. Starting with geomagnetic field data, the geoelectric fields in the absence of the pipeline were calculated using the surface impedance derived from a layered-Earth conductivity model. The influence of the pipeline on the electric fields was then examined using an infinitely long cylinder (ILC) model. Pipe-to-soil potentials produced by the electric field induced in the pipeline were calculated using a distributed source transmission line (DSTL) model. The geomagnetic induction process is frequency dependent; therefore, the calculations are best performed in the frequency domain, using a Fourier transform to go from the original time domain magnetic data, and an inverse Fourier transform at the end of the process, to obtain the pipe-to-soil potential variation in the time domain. Examples of the model calculations are presented and compared to observations made on a long pipeline in the auroral zone.

Key words. Geomagnetism and paleomagnetism (geo-magnetic induction)
Reference Key
trichtchenko2002annalesmodelling Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;L. Trichtchenko;L. Trichtchenko;L. Trichtchenko;D. H. Boteler
Journal journal of food measurement and characterization
Year 2002
DOI
10.5194/angeo-20-1063-2002
URL
https://www.ann-geophys.net/20/1063/2002/angeo-20-1063-2002.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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