Uhf Couplers For Gas-Insulated Substations: A Calibration Technique
IEE PROCEEDINGS-SCIENCE MEASUREMENT AND TECHNOLOGY(1997)
摘要
Methods that have been used to evaluate the performance of UHF couplers for partial discharge monitoring of gas-insulated substations are briefly reviewed, illustrating the need for a standard test procedure. A measurement scheme is proposed in which the coupler is mounted beneath an aperture in a ground plane and subjected to an incident electric field of known intensity. A TEM line is used to evaluate the technique, and a step excitation is shown to have advantages over swept frequency measurements. The frequency responses of two disc couplers and an external window coupler are measured to demonstrate the technique.
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关键词
gas-insulated substations, discharge monitoring, wideband UHF couplers
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