Influence of GIS structure on propagation of electromagnetic waves of partial discharge

Author

Li, Q. ; Qiu, W.B. ; Cai, K.S. ; Sheng, G.H. ; Liu, Y.D. ; Huang, X.Q. ; Jiang, X.C.

Author_Institution

Henan Electr. Power Res. Inst., Zhengzhou, China

Volume

2

fYear

2011

fDate

8-9 Sept. 2011

Firstpage

128

Lastpage

135

Abstract

Partial discharge process caused by GIS typical insulation defect is mainly analyzed in this study, and propagation properties of electromagnetic waves in actual GIS structure are investigated by applying FDTD algorithm and using real PD current signal as excitation source. The results show that great difference occurs between electromagnetic waves excited by PD actual current signal and that by ideal Gaussian pulse excitation and basin type insulator, shielding electrodes and three-phase common enclosure can affect the amplitude, frequency component and propagation mode of electromagnetic waves. The electromagnetic waves signal intensity is not necessarily proportional to its distance from discharge source; the proportion of frequency components is proportional to the diameter of GIS shell when it propagate in breakers.

Keywords

electrodes; electromagnetic wave propagation; finite difference time-domain analysis; gas insulated switchgear; insulators; partial discharges; FDTD algorithm; GIS structure; PD current signal; basin type insulator; electromagnetic wave propagation; electromagnetic wave signal intensity; excitation source; ideal Gaussian pulse excitation insulator; insulation defect; partial discharge; shielding electrode; three-phase common enclosure; Computational modeling; Electromagnetic scattering; Equations; Gas insulation; Insulators; Mathematical model; Partial discharges; GIS; PD; basin type insulator; breaker; propagation of electromagnetic Waves; shielding electrode;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering and Automation Conference (PEAM), 2011 IEEE

Conference_Location

Wuhan

Print_ISBN

978-1-4244-9691-4

Type

conf

DOI

10.1109/PEAM.2011.6134924

Filename

6134924