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Effect of the Existence of the Epoxy Spacer on the Characteristics of Partial Discharge Induced Electromagnetic Wave Propagating through T-Branch 154kV GIS Model Tank
◎Umar Khayam（バンドン工科大学）・西河内貴一・Masayuki Hayashi・小迫雅裕・匹田政幸（九州工業大学）・星野俊弘・丸山志郎・中嶋 隆（東芝）
It is important for reliable diagnosis technique to clarify electromagnetic (EM) wave propagation characteristics at the impedance discontinuity part in gas insulated switchgear (GIS) like spacer, disconnecting part, L branch, and T branch [1]. In this paper the influence of the existence of the insulating spacer on the partial discharge (PD) induced EM wave propagating through T-Branch of 154 kV GIS tank model was examined by the experiment. The existence of the spacer decreases the transmission rate of PD induced EM wave. The transmission rate of PD induced EM wave is influenced mainly of propagation of high frequency component (TE mode) of PD induced EM wave. It has less influence on the propagation characteristics before and after T branch.