Review of research on entry path and safety assessment of equipotential live working on extra-high voltage/ultra-high voltage transmission lines

Authors

• Peng LI, Hubei Provincial Engineering Technology Research Center for Power Transmission Line, China Three Gorges University, Yichang 443002, China; College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, ChinaFollow
• Li HE, Hubei Provincial Engineering Technology Research Center for Power Transmission Line, China Three Gorges University, Yichang 443002, China; College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China
• Lingxuan GAN, Hubei Provincial Engineering Technology Research Center for Power Transmission Line, China Three Gorges University, Yichang 443002, China; College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China
• Tao XIE, Wuhan NARI Limited Liability Company, State Grid Electric Power Research Institute, Wuhan 430074, China
• Houming SHEN, Wuhan NARI Limited Liability Company, State Grid Electric Power Research Institute, Wuhan 430074, China
• Tian WU, Hubei Provincial Engineering Technology Research Center for Power Transmission Line, China Three Gorges University, Yichang 443002, China; College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443002, China

Keywords

equipotential live working; transmission line; extra-high voltage; ultra-high voltage; safety distance; development trend

Abstract

With the transformation of China 's energy structure and the accelerated construction of new power systems, extra-high voltage/ultra-high voltage transmission projects are gradually being developed into a backbone network to achieve cross-regional energy deployment and support new energy consumption. In this context, as equipotential live working is the core technology to ensure the uninterrupted operation of power grids, the optimization of entry paths and dynamic safety assessment for it become the key focus of current research. Firstly, the key technology systems of equipotential live working on extra-high voltage/ultra-high voltage transmission lines are systematically reviewed, and a complete research framework is constructed. Secondly, based on the development history and current status of equipotential live working technology in China and abroad, the research progress of live working in recent years in the directions of safety distance, path planning, safety assessment, and potential transfer is reviewed. Finally, combined with the challenges faced in the construction of new power systems and the application practices of emerging technologies such as artificial intelligence and digital twins in power systems, the key directions and technical paths for the future development of equipotential live working technology are prospected.

DOI

10.19781/j.issn.1673-9140.2026.02.001

First Page

1

Last Page

19

Recommended Citation

LI, Peng; HE, Li; GAN, Lingxuan; XIE, Tao; SHEN, Houming; and WU, Tian (2026) "Review of research on entry path and safety assessment of equipotential live working on extra-high voltage/ultra-high voltage transmission lines," Journal of Electric Power Science and Technology: Vol. 41: Iss. 2, Article 1.
DOI: 10.19781/j.issn.1673-9140.2026.02.001
Available at: https://jepst.researchcommons.org/journal/vol41/iss2/1