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Volume 14
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10.3390/en14196116
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Article

Optical Diagnostic Characterization of the Local Arc on Contaminated Insulation Surface at Low Pressure †

by
Hao Yang
1,*,
Haotian Zhang
1,
Wen Cao
1,
Xuanxiang Zhao
1,
Ran Wen
1,
Junping Zhao
2,
Shengwu Tan
3 and
Pengchao Wang
3
1
School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China
2
School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China
3
Pinggao Group Company Limited, Pingdingshan 467000, China
*
Author to whom correspondence should be addressed.
†
This paper is an extended version of our paper published in 2020 IEEE International Conference on High Voltage Engineering and Application (ICHVE), Beijing, China, 6–10 September 2020; pp. 1–4.
Energies 2021, 14(19), 6116; https://doi.org/10.3390/en14196116
Submission received: 17 August 2021 / Revised: 18 September 2021 / Accepted: 21 September 2021 / Published: 26 September 2021
(This article belongs to the Special Issue Selected Papers from 2020 IEEE International Conference on High Voltage Engineering (ICHVE 2020))
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Abstract

Flashover of contaminated insulators is a major problem for power systems at high altitude. Laboratory experiments have shown that the optical diagnostic method can provide extensive information on the physical process of contamination flashover. In this paper, a study of the local arc on a wet polluted surface under low pressure by using the optical diagnostic method is presented. The thickness of the continuous spectrum, spectral line intensity and the spectral composition varies significantly in different stages of the local arc development. Thermodynamic parameters of the local arc (including electron temperature, electron density and conductivity) are obtained by analyzing the spectra. Both the electron temperature and the conductivity increase with the increase in leakage current and air pressure. Although the electron density does not change significantly with an increase in leakage current, it increases significantly with an increase in air pressure. The findings of this work could be used as supplementary information for the investigation of local arc parameters, thus providing a reliable reference for the calculation of contamination flashover at high altitude.
Keywords: contamination flashover; the local arc; low pressure; optical diagnostic method contamination flashover; the local arc; low pressure; optical diagnostic method

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MDPI and ACS Style

Yang, H.; Zhang, H.; Cao, W.; Zhao, X.; Wen, R.; Zhao, J.; Tan, S.; Wang, P. Optical Diagnostic Characterization of the Local Arc on Contaminated Insulation Surface at Low Pressure. Energies 2021, 14, 6116. https://doi.org/10.3390/en14196116

AMA Style

Yang H, Zhang H, Cao W, Zhao X, Wen R, Zhao J, Tan S, Wang P. Optical Diagnostic Characterization of the Local Arc on Contaminated Insulation Surface at Low Pressure. Energies. 2021; 14(19):6116. https://doi.org/10.3390/en14196116

Chicago/Turabian Style

Yang, Hao, Haotian Zhang, Wen Cao, Xuanxiang Zhao, Ran Wen, Junping Zhao, Shengwu Tan, and Pengchao Wang. 2021. "Optical Diagnostic Characterization of the Local Arc on Contaminated Insulation Surface at Low Pressure" Energies 14, no. 19: 6116. https://doi.org/10.3390/en14196116

APA Style

Yang, H., Zhang, H., Cao, W., Zhao, X., Wen, R., Zhao, J., Tan, S., & Wang, P. (2021). Optical Diagnostic Characterization of the Local Arc on Contaminated Insulation Surface at Low Pressure. Energies, 14(19), 6116. https://doi.org/10.3390/en14196116

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