Global and Brazilian Perspectives on Managing Ground Potential Rise at Overhead AC Transmission Structures during Power Frequency Faults : Invited Lecture: CIGRE Technical Brochure 694 Tutorial

The awareness of the potential safety risk is paramount in the safe operation of overhead transmission lines. The consequence of safety hazards from touch, step and transferred voltages due to Ground Potential Rise (GPR) cannot be ignored or under-estimated. A CIGRE Technical Brochure [1] has been d...

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Bibliographic Details
Published in2019 International Symposium on Lightning Protection (XV SIPDA) pp. 1 - 20
Main Authors Chisholm, William A., Jardini, Jose A, Freire, Paulo Edmundo, George Watt, CA, Lionel Figueroa, FR, Oswaldo Regis, BR
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2019
Subjects
electrocution risk
grounding
soil resistivity
step potential
touch potential
transmission line
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Summary:The awareness of the potential safety risk is paramount in the safe operation of overhead transmission lines. The consequence of safety hazards from touch, step and transferred voltages due to Ground Potential Rise (GPR) cannot be ignored or under-estimated. A CIGRE Technical Brochure [1] has been developed to provide a brief overview of the source of the GPR problems related to ground current from ac line faults to the line grounding systems. The GPR issues are sensitive to the soil resistivity near the tower and to other factors. Any safety risk mitigation may require stringent measures at locations where public access is frequent and to a lesser degree when the access is extremely rare. The GPR mitigation should be designed to ensure any potential hazards be kept to acceptable levels.
DOI:10.1109/SIPDA47030.2019.8951552