Universal designing, optimization and test method of ultra-high frequency local discharging sensor
A technology of partial discharge and test method, applied in the direction of testing dielectric strength, instrument, measuring electricity, etc., to achieve the effect of good signal transmission effect
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[0057] Embodiment: Take the design process of the built-in UHF sensor of GIS equipment as an example to illustrate:
[0058] 1. Model design optimization stage
[0059] 1. Bandwidth determination
[0060] Partial discharge signals in GIS are usually within the ultra-wideband detection range. Considering the compact structure of GIS equipment and the limited internal installation space, the designed sensor bandwidth of this embodiment is 700MHz~~3GHz.
[0061] 2. Determine the basic parameters of the sensor body
[0062] The planar equiangular helical antenna has the characteristics of detection frequency bandwidth, pattern, impedance and polarization basically unchanged in the whole frequency band, so it has been widely used in partial discharge detection. Therefore, this embodiment adopts a planar equiangular helical antenna as the body of the UHF sensor for design.
[0063] An arm of a planar equiangular helical antenna consists of two equiangular helixes, any of which sa...
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