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

被引：0

作者：

Chisholm, William A. ^{[1
]}

Jardini, Jose A. ^{[2
]}

Freire, Paulo Edmundo ^{[3
]}

Watt, George ^{[4
]}

Figueroa, Lionel ^{[4
]}

Regis, Oswaldo ^{[4
]}

机构：

[1] METSCO, EDM, Kinectr, Toronto, ON, Canada

[2] Univ Sao Paulo, Elect Power & Automat Engn Dept, Sao Paulo, Brazil

[3] Paiol Engn, Sao Paulo, Brazil

[4] CIGRE B2 56, Ottawa, ON, Canada

来源：

2019 INTERNATIONAL SYMPOSIUM ON LIGHTNING PROTECTION (XV SIPDA) | 2019年

关键词：

grounding; transmission line; electrocution risk; touch potential; step potential; soil resistivity;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页数：20