Discharge characteristics and development process of potential transfer gap in live-line work
Source abstract
Abstract
Potential transfer is an essential link in equipotential live-line work (EPLW), which has a potential safety hazard. To ensure the safety of the linemen, this paper conducted experimental research on this process. First, to investigate the discharge characteristics of the potential transfer gap in EPLW, this paper developed a simplified experimental platform to examine the relationship between the transfer voltage and gap distance, as well as the electrode structure, during the potential transfer process. Second, to explore the discharge development process of potential transfer, this paper built a discharge observation experimental platform to observe the discharge process and explore the effects of gap distance and type of the floating electrode on the discharge development process and potential transfer current. The research results are valuable for practical projects and linemen safety.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: High voltage insulation and dielectric phenomena · Electrical Fault Detection and Protection · Lightning and Electromagnetic Phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Electrical and Information Engineering, Hunan University 1 , Changsha 410082, China
Skills Training Center of State Grid Sichuan Provincial Electric Power Company (Sichuan Electric Vocational and Technical College) 2 , Chengdu 611133, China
State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute 3 , Wuhan 430076, China
Shenzhen Power Supply Bureau Co., Ltd, China Southern Power Grid 4 , Shenzhen 518000, China
School of Electrical Engineering and Automation, Wuhan University 5 , Wuhan 430072, China
Funding
National Natural Science Foundation of China · Open Fund of State Key Laboratory of Power Grid Environmental Protection
References (28)
Show source-provided references
1. Calculation of ground-level electric field and ion flow of HVDC transmission lines with shield wires10.13335/j.1000-3673.pst.2016.2487 ↗
2. Prediction of breakdown voltage of equipotential live-line work air gaps in transmission lines: A computational discharge model10.1109/temc.2022.3193203 ↗
3. Modelling for switching impulse breakdown of live working gaps between equipotential worker and transmission towers10.1049/iet-gtd.2019.0789 ↗
4. Experimental investigation of the streamer zone of long-spark positive leader using high-speed photography and microwave probing10.1029/2019jd031826 ↗
5. Elongation and branching of stem channels produced by positive streamers in long air gaps10.1038/s41598-021-83816-7 ↗
6. Guided ionization waves: Theory and experiments10.1016/j.physrep.2014.02.006 ↗
7. A numerical analysis model for inception and propagation of positive upward leader from UHV DC transmission lines10.1016/j.epsr.2022.108188 ↗
8. 2011
9. Experimental study on the final jump phase in long air gap discharges10.1016/j.elstat.2020.103473 ↗
10. Experimental study on streamer-leader transition characteristics of sphere-plane gap in valve hall under positive switching impulse voltage10.1016/j.elstat.2023.103829 ↗
11. Model test on the effect of hillside on lightning shielding performance of ±1100 kV transmission lines10.1016/j.ijepes.2020.106734 ↗
12. Influence of blade rotation on the lightning stroke characteristic of a wind turbine10.1002/we.2341 ↗
13. Performance against direct lightning on 10-kV overhead distribution lines with counterpoise wires10.1109/TEMC.2023.3243734 ↗
14. Comprehensive assessment of lightning protection schemes for 10 kV overhead distribution lines10.1109/tpwrd.2021.3110248 ↗
15. Breakdown characteristics of a long air gap containing a floating conductor under positive switching impulse10.1109/tdei.2022.3201780 ↗
16. Experimental investigation of discharge path selectivity of a long air gap containing a floating conductor10.1109/temc.2022.3176684 ↗
17. Experimental platform for measuring electrical discharges in long air gaps with floating objects and its applications under lightning impulse10.1109/jsen.2022.3228826 ↗
18. Experimental investigation on the formation mechanism of the lowest breakdown voltage area in a long air gap containing a floating conductor under positive wwitching impulses10.1109/TDEI.2023.3309284 ↗
19. Leader discharge characteristics of equipotential live-line work gaps under positive switching impulse10.1016/j.elstat.2024.103895 ↗
20. Effect of a floating conductor on discharge characteristics of a long air gap under switching impulse10.1016/j.elstat.2021.103629 ↗
21. Breakdown characteristics of combined air gaps under lightning impulse10.1063/5.0084951 ↗
22. Equal-potential entering path and arc energy calculation method for live working on ±800 kV DC transmission line based on FEM
23. Research on discharge characteristics of potential transfer for live working on UHVDC transmission line
24. Study on potential transfer model considering dynamic arc characteristics
25. Simulation analysis of potential transfer process in live-line maintenance10.1016/j.egyr.2022.08.049 ↗
26. Discharge of air gaps during ground potential live-line work on transmission lines10.1016/j.epsr.2020.106519 ↗
27. Discharge characteristics of ground potential live-line work air gaps in cup towers and double circuit towers10.1016/j.egyr.2022.02.119 ↗
28. 2010