Title :
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
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;
Conference_Titel :
Power Engineering and Automation Conference (PEAM), 2011 IEEE
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-9691-4
DOI :
10.1109/PEAM.2011.6134924
