Abstract
ABSTRACTBased on the spheroconical monopole antenna theory, we design a novel type of ultra-high frequency (UHF) sensor for partial discharge (PD) location in substations. With a spheroconical structure, this sensor is featured by broadband, omnidirectional capability, high sensitivity, low reflection loss, and constant group delay, meeting the requirements of omnidirectional detection of discharge sources. A UHF sensor array made up of several sensors of this type can implement spatial location of discharge sources. To verify the discharge source location performance of the sensor array, we construct a PD experimental platform in the laboratory. The PD source location results indicate that the location system based on a UHF sensor array accurately locates PD sources. Therefore, the UHF sensor developed in this paper can be applied to spatial location of PD sources in substations.
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