A calibration device and method for an ultra-high frequency partial discharge sensor

Abstract

The invention provides a calibration device and method for an ultra-high frequency partial discharge sensor, which cooperates with the ultra-high frequency partial discharge sensor to be calibrated, and includes a signal generator for providing ultra-high frequency signals, and a signal generator for receiving ultra-high frequency signals The signal receiver, the impedance transition section used to eliminate the catadioptric reflection of the UHF signal, the coaxial transmission line used to generate the TEM wave when the UHF signal is transmitted, the matching impedance and the oscilloscope used to display the frequency and amplitude of the TEM wave ; There are two impedance transition sections and both are cones; the tops of the two impedance transition sections are provided with matching impedances and signal receivers connected to the signal generator respectively, and the conical bottoms of the two impedance transition sections are provided with coaxial Transmission line; the coaxial transmission line is a hollow cylinder, and an ultra-high frequency partial discharge sensor to be calibrated is provided on the inner wall of the oscilloscope. By implementing the embodiment of the present invention, the sensitivity and bandwidth of the ultra-high frequency partial discharge sensor can be more accurately calibrated, and the workload is reduced.

Description

technical field [0001] The invention relates to the technical field of ultra-high frequency partial discharge sensors, in particular to a calibration device and method for ultra-high frequency partial discharge sensors. Background technique [0002] UHF partial discharge detection technology has been widely used in online monitoring of insulation status of large power equipment such as GIS (Gas Insulated Switchgear, gas insulated switchgear) due to its strong anti-interference ability and other advantages. However, currently there are no relevant international / national / industry standards for UHF partial discharge sensors, so there is no uniform standard for assessment and verification of UHF partial discharge sensors from different manufacturers in the market. Although the International Large Power Grid Conference once proposed the method of artificial pulse injection to calibrate the sensitivity and bandwidth of the UHF partial discharge sensor, it needs repeated debugging ...

AI Technical Summary

Problems solved by technology

However, currently there are no relevant international / national / industry standards for UHF partial discharge sensors, so there is no uniform standard for assessment and verification of UHF partial discharge sensors from different manufacturers in the market

Although the International Large Power Grid Conference once proposed the method of artificial pulse injection to calibrate the sensitivity and bandwidth of the UHF partial discharge sensor, it needs repeated debugging to determine a reasonable artificial pulse. The process is cumbersome, and because the artificial pulse includes Abundant spectrum components easily lead to aliasing of different spectrums, making it difficult to evaluate calibration results

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