GEOSCAN Search Results: Fastlink


TitleTelluric effects on pipelines
AuthorBoteler, D H; Trichtchenko, L; Edwal, H -E
SourceProceedings of the CEOCOR Symposium; 2013-13, 2013 p. 1-16
Alt SeriesEarth Sciences Sector, Contribution Series 20130390
MeetingCEOCOR Symposium; Florence; IT; June 4-7, 2013
Mediaon-line; digital
File formatpdf
Subjectspipelines; pipeline feasibility studies; telluric field; magnetic disturbances; magnetic field; magnetic surveys; geomagnetic variations; geomagnetism; geomagnetic fields
Illustrationsprofiles; plots
ProgramTargeted Hazard Assessments in Northern Canada, Public Safety Geoscience
AbstractTelluric currents are produced in pipelines by the magnetic field variations that occur during geomagnetic disturbances. The telluric currents produce variations in pipe-to-soil potential (PSP) that can take the PSP outside the preferred range for cathodic protection. Use of higher resistance coatings on modern pipelines has increased the size of telluric PSP variations and increased the awareness of the telluric effects. Observations and modelling have shown that the size of the telluric PSP variations changes with position along a pipeline. This paper explains how to model telluric effects on pipelines and shows how pipeline characteristics such as pipeline length, coating conductance, and bends influence the telluric potentials. The modelling provides a framework for understanding telluric observations and can be used for telluric hazard assessments and for design of pipeline cathodic protection systems.
Summary(Plain Language Summary, not published)
Space weather refers to the dynamic conditions on the Sun and in the space environment, in particular, in the near-Earth environment, that can affect critical infrastructure. NRCan operates the Canadian Space Weather Forecast Centre and conducts research into space weather effects on power systems, pipelines, radio communications and GNSS positioning to help Canadian industry understand and mitigate the effects of space weather. This paper examines geomagnetic induction in pipelines and shows how to model the pipeline voltages that are produced. This modelling is used to examine how characteristics of the pipeline influence the size of the voltages. This provides information to guide the design of pipeline systems to prevent corrosion.