Study on UHF electromagnetic wave propagation characteristics of partial discharge in GIS

Yanli Zhi; Liqiong Min; Xuan Li; Licai Yan; Dianmao Zhang; Hai Liu

doi:10.1117/12.2620662

29 November 2021 Study on UHF electromagnetic wave propagation characteristics of partial discharge in GIS

Yanli Zhi, Liqiong Min, Xuan Li, Licai Yan, Dianmao Zhang, Hai Liu

Proceedings Volume 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021); 120801J (2021) https://doi.org/10.1117/12.2620662
Event: 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 2021, Nanchang, China

Abstract

With the rapid development of UHV projects in power grid, partial discharge fault has become one of the main faults of power equipment, most of which are GIS faults, but there is a lack of research on the propagation of partial discharge UHF electromagnetic wave signal in GIS. Based on this, this paper analyzes the propagation principle of UHF electromagnetic wave propagation in GIS, draws a simplified GIS model, and studies the characteristics of TEM, TE and TM waves by analyzing the size and distribution characteristics of various types of field strength in GIS; At the same time, by building GIS simulation model, the distribution characteristics of radial electromagnetic wave are deeply studied. It is found that the high-order mode component of electromagnetic wave decays rapidly due to the reflection and leakage of insulator when passing through the first insulator, and the electromagnetic wave signal is mainly TEM mode component. When partial discharge electromagnetic wave leaks through insulator, The frequency components below 1250mhz have obvious attenuation, and the frequency points with concentrated electromagnetic wave energy have "upward shift". This research can provide a strong theoretical basis for GIS partial discharge detection.

Citation Download Citation

Yanli Zhi, Liqiong Min, Xuan Li, Licai Yan, Dianmao Zhang, and Hai Liu "Study on UHF electromagnetic wave propagation characteristics of partial discharge in GIS", Proc. SPIE 12080, 4th International Symposium on Power Electronics and Control Engineering (ISPECE 2021), 120801J (29 November 2021); https://doi.org/10.1117/12.2620662

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