Study on Propagation Characteristics of EM Wave of PD in Cable Accessories

Abstract:

PD in cable accessories will inspire EM waves of ultra-high frequency (UHF) at hundreds of MHZ to GHZ. To study the characteristics of EM wave inspired by PD in cable accessories, a three-dimension model of 110kV cable joints is established. Based on the propagation theory of EM waves in coaxial waveguide, finite element method (FEM) is used to analyze the effect of cable joints composite interfaces on UHF signal propagation, and simulation analysis of relations between PD UHF signal's energy distribution, pulse frequency, propagation distance. Simulation results show that the main transmission mode of EM waves is TEM mode in the joints; Energy of EM waves descends rapidly as the PD pulse's frequency increases; Energy of TEM waves descends rapidly with the increasing detection distance. Simulation analysis of UHF signal's propagation characteristics provides the theoretical basis for UHF PD detection in cable accessories.

• Periodical: Applied Mechanics and Materials (Volumes 325-326)
• Pages: 610-614
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.325-326.610
• Online since: June 2013
• Authors: Qian Shi, Feng Wang, Ting Ting Fu, Yan Miao
• Keywords: Cable Accessories, Electromagnetic Waves (EMW), Finite Element Method (FEM), Partial Discharge (PD), UHF

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