Title :
Investigation of PD pulse propagation characteristics in GIS
Author :
Mizuno, X. ; Ogawa, Anna ; Nojima, K. ; Murase, H. ; Koyama, H. ; Wakabayashi, S. ; Sakakibara, T.
Author_Institution :
Chubu Electric Power Co. Inc., Nagoya, Japan
fDate :
5/1/1997 12:00:00 AM
Abstract :
Concentrating on the TEM mode, the damping characteristics of partial discharge (PD) pulses propagating through each gas-insulated switchgear (GIS) component were investigated. As a result, it was discovered that frequency components above 500 MHz were remarkably damped by spacers, T-shape branches, and L-bends. Quantitative studies were undertaken on the frequency dependency of these damping characteristics. Then the equivalent circuits for analyzing the propagation characteristic of PD pulses were proposed. Furthermore, the validity of concentrating on the TEM mode was denoted by tests at a substation in service
Keywords :
damping; electric breakdown; equivalent circuits; gas insulated switchgear; insulation testing; partial discharges; switchgear testing; L-bends; T-shape branches; damping characteristics; dielectric breakdown tests; equivalent circuits; frequency components; gas-insulated switchgear; partial discharges; pulse propagation characteristics; spacers; Circuit analysis; Circuit testing; Damping; Equivalent circuits; Frequency; Gas insulation; Geographic Information Systems; Partial discharges; Pulse circuits; Switchgear;
Journal_Title :
Power Systems, IEEE Transactions on
