Experimental Investigation on Propagation Characteristics of PD Radiated UHF Signal in Actual 252 kV GIS

• Published in: Energies (Basel) Vol. 10; no. 7; p. 942
• Main Authors: Li, Tianhui, Rong, Mingzhe, Wang, Xiaohua, Pan, Jin
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01.07.2017
• Subjects: Circular waveguides; Coaxial waveguides; Defects; Design; Electric power; Electricity distribution; Engineering; gas insulated switchgear (GIS); higher order mode; International conferences; partial discharge (PD); Position sensing; Propagation; propagation characteristic; Sensors; Signal processing; Simulation; Transverse electric modes; transverse magnetic (TM) mode; ultra-high-frequency (UHF) sensor; Canada; United States > US; China
• ISSN: 1996-1073; 1996-1073
• DOI: 10.3390/en10070942

Furthermore, using the UHF technique in PD detection can be influenced by the position of the sensor, which will in turn affect the PD diagnosis. [...]it is necessary to investigate the propagation characteristics of UHF signals in various kinds of GIS structure [6,7,8,9,10] so as to study the propagation process of UHF signal and obtain optimal performance of the sensor. Currently, most research, especially experimental work, has not considered the performance of UHF sensors adequately [30,31,32]. [...]the transmission rates of the UHF signal in each case are compared in order to investigate the effect of sensor position, which provides a reference for actual utilization of UHF sensors and better application of UHF techniques in PD detection. 2. Furthermore, the measured deviation is the largest here, while those in the other three positions still maintain a decreasing order. Since the tank structure at the gap changes from a coaxial waveguide to a circular waveguide, it is more accessible for high-order mode that above TE11 (transverse electric mode 11) to pass the tank with DS.