Title :
TEM- and TE-mode waves excited by partial discharges in GIS
Author :
Zhang, M.C. ; Li, H.
Author_Institution :
Xi´´an Jiaotong Univ., China
Abstract :
The possibility of using information from the TEM- and TE-modes for the detection and location of partial discharges has been investigated. The propagation and attenuation of the E and H components of the different modes excited radially by a line current in a coaxial cylinder is described. To give the verification of it, experiments have been performed with simulated partial discharge currents injected radially in a GIS test facility. It is shown that: both the TEM-mode and TE11-mode are excited by partial discharges in GIS; an inductive sensor allows the TEM-mode to be distinguished from the TE-mode; and the discharge location can be determined by employing different propagation velocities of the TEM- and TE11-modes
Keywords :
gas insulated substations; E component attenuation; E component propagation; GIS; GIS test facility; H component attenuation; H component propagation; TE-mode waves excitation; TE11-mode; TEM-mode waves excitation; coaxial cylinder; gas insulated substations; inductive sensor; injected PD currents; line current; partial discharges detection; partial discharges location; propagation velocities; simulated partial discharge currents;
Conference_Titel :
High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)
Conference_Location :
London
Print_ISBN :
0-85296-719-5
DOI :
10.1049/cp:19990906
