Abstract
The maintenance of power transmission lines is often carried out through live working to ensure the uninterrupted power supply of the power systems. When the worker enters the high potential area from the ground potential, it forms a floating potential conductor, which affects the air gap discharge characteristics in the transmission lines. Studying the discharge characteristics in this condition is directly related to the safety of the workers. This article builds a long air gap experimental platform with a floating potential conductor to simulate the actual working conditions in live working. Finally, the positive switching impulse breakdown voltages with the floating potential conductor in different longitudinal positions are obtained. The results show that the existence of the floating potential conductor will affect the breakdown voltage of the air gap, and there is a position with the lowest breakdown voltage. Furthermore, considering the disadvantages of the high cost of the full-scale test, this article uses experimental data to establish a mathematical model to predict the breakdown voltages. By comparing the predicted value with the experimental value, it can be found that the model has good adaptability and can be used to predict the breakdown voltage in this condition.
Similar content being viewed by others
References
Xiao B, Wang L, Liu K et al (2010) Experimental analysis of live working on 750 kV compact double circuits transmission line on the same tower. High Volt Eng 36:2863. https://doi.org/10.13336/j.1003-6520.hve.2010.11.036
Wang L, Liu K, Hu Y et al. (2009) Research on minimum approach distance for live working on 1000kV ultra high voltage AC transmission line. In: Asia-Pacific Power and Energy Engineering Conference, Wuhan. https://doi.org/10.1109/APPEEC.2009.4918698
Hu Y, Liu K, Wang L et al (2010) Experimental research of live working on 1000 kV double circuit AC transmission line on the same tower. High Volt Eng 36:2668–2673. https://doi.org/10.13336/j.1003-6520.hve.2010.11.016
Chen W, Zeng R, He H (2013) Research progress of long air gap discharges. High Volt Eng 39:1281–1295. https://doi.org/10.3969/j.issn.1003-6520.2013.06.001
An Y, Wen X, Hu Y et al (2017) Conductor arrangement effects on negative discharge characteristics of rod-conductor. Proc CSEE 37:4557-4565+4598. https://doi.org/10.13334/j.0258-8013.pcsee.161161
Lv F, Geng J, Qin Y et al (2020) Influence of protrusions on the positive switching impulse breakdown voltage of sphere-plane air gaps in high-altitude areas. IET Sci Meas Technol 14:499. https://doi.org/10.1049/iet-smt.2019.0184
Fang Y, Wang L, Li R et al (2020) switching impulse flashover characteristics of live working air gaps in high altitude areas and discharge voltage correction. Trans China Electrotech Soc 35:2681–2688. https://doi.org/10.19595/j.cnki.1000-6753.tces.190703
Shah W, He J, Ahmad T, Ali M (2020) Experimental study on the final jump phase in long air gap discharges. J Electrost 106:103473. https://doi.org/10.1016/j.elstat.2020.103473
Liao Y, Mahardika N, Zhao X, Lee J, He J (2020) Shock wave propagation in long laboratory sparks under negative switching impulses. J Phys D Appl Phys 54:015205. https://doi.org/10.1088/1361-6463/abb8ff
Gao J, Wang L, Li G, Fang Y, Song B, Liu K, Xiao B (2020) Discharge of air gaps during ground potential live-line work on transmission lines. Electric Power Syst Res 187:106519. https://doi.org/10.1016/j.epsr.2020.106519
Gao J, Wang L, Lian Z, Li G, Fang Y, Song B (2020) Engineering model of dielectric strength in phase-to-phase air gaps. IET Gener Transm Distrib 14:4179. https://doi.org/10.1049/iet-gtd.2020.0592
Diaz O, Arevalo L, Cooray V (2015) Leader channel models for long air positive electrical discharges. J Electrostat 76:208. https://doi.org/10.1016/j.elstat.2015.05.026
Gao J, Wang L, Zhang Q et al (2018) Modeling of positive switching impulse discharge of UHV transmission line air gaps. Appl Sci 8:2594. https://doi.org/10.3390/app8122594
Gao J, Wang L, Wu S et al (2021) Effect of a floating conductor on discharge characteristics of a long air gap under switching impulse. J Electrost 114:103629. https://doi.org/10.1016/j.elstat.2021.103629
Shao T, Mei H, Zeng X et al (2021) AC breakdown characteristics of rod-plane gap with floating conductor. High Volt Eng 47:1046–1054. https://doi.org/10.13336/j.1003-6520.hve.20191932
Zhang Q, Wang L, Fang Y et al (2018) Simulation method for discharge characteristics of live working complex gap. High Volt Eng 44:1292–1301. https://doi.org/10.13336/j.1003-6520.hve.20180329032
Cai H, Shao G, Wen K et al (2014) Influence of floating conducting objects on switching impulse discharge characteristics of phase-to-phase gap between tabular buses. High Volt Eng 40:3918–3925. https://doi.org/10.13336/j.1003-6520.hve.2014.12.037
Shu S, Ruan J, Huang D et al (2015) Predication for breakdown voltage of air gap based on electric field features and SVM. Proc CSEE 35:742–750. https://doi.org/10.13334/j.0258-8013.pcsee.2015.03.030
Gallet G, LeRoy G, Lacey R et al (1975) General expression for positive switching impulse strength valid up to extra long air gaps. IEEE Trans Power Appar Syst 94:1989–1993. https://doi.org/10.1109/T-PAS.1975.32045
Carrara G, Thione L (1976) Switching surge strength of large airgaps: a physical approach. IEEE Trans Power Appar Syst 95:512–524. https://doi.org/10.1109/T-PAS.1976.32131
Fofana I, Beroual A, Rakotonandrasana H (2013) Application of dynamic models to predict switching impulse withstand voltages of long air gaps. IEEE Trans Dielectr Electr Insul 20:89–97. https://doi.org/10.1109/TDEI.2013.6451345
Rizk FAM (1995) Effect of floating conducting objects on critical switching impulse breakdown of air insulation. IEEE Trans Power Delivery 10:1360. https://doi.org/10.1109/61.400917
Baldo G (1989) Floating potential bodies and their interaction with discharge development. In: 6th ISH, New Orleans
Hutzler B (1987) Switching Impulse Strength of Air Gaps Containing a Metallic Body at Floating Potential. In: 5th ISH, Brauschweig
Viljoen R (2009) Flashover performance of a rod-rod gap containing a floating rod under switching impulses with critical and near critical times to crest, Dissertation, University of the Witwatersrand
Wang L, Hu Y, Liu K et al (2005) Research on live working on 500 kV compact transmission lines in high altitude area. High Volt Eng 31:12. https://doi.org/10.13336/j.1003-6520.hve.2005.08.005
Hu Y, Wang L, Liu K et al (2007) Research of minimum approach distance for live working on 750 kV AC transmission lines. High Volt Eng 33:150. https://doi.org/10.13336/j.1003-6520.hve.2007.11.042
Wang L, Hu Y, Shao G et al (2006) Research on minimum approach distance for live working on 1000kV AC transmission line. High Volt Eng 32:78. https://doi.org/10.13336/j.1003-6520.hve.2006.12.019
Baldo G, Hutzler B, Pigini A, Rizk F (1992) Guidelines for the Evaluation of the Dielectric Strength of External Insulation, CIGRE SC 33 WG 07, chapter Fundamentals of the discharge mechanics
Hong W (2011) Electric load forecasting by seasonal recurrent SVR (support vector regression) with chaotic artificial bee colony algorithm. Energy 36:5568–5578. https://doi.org/10.1016/j.energy.2011.07.015
Chen Y, Xu P, Chu Y et al (2017) Short-term electrical load forecasting using the Support Vector Regression (SVR) model to calculate the demand response baseline for office buildings. Appl Energy 195:659–670. https://doi.org/10.1016/j.apenergy.2017.03.034
Yang X, Deb S (2009) Cuckoo Search via Lévy Flights. In: World Congress on Nature & Biologically Inspired Computing. https://doi.org/10.1109/NABIC.2009.5393690
Acknowledgements
This work was supported by National Engineering Laboratory for Ultra High Voltage Engineering Technology (Kunming, Guangzhou).
Funding
National Engineering Laboratory for Ultra High Voltage Engineering Technology, (Grant number 9500002020030101YJZX00086).
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Competing interest
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this article.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
About this article
Cite this article
Xie, C., Wang, L., Gao, J. et al. Prediction method of breakdown voltage of long air gaps containing a floating conductor. Electr Eng 104, 4169–4177 (2022). https://doi.org/10.1007/s00202-022-01605-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00202-022-01605-5