UHF partial discharge（PD） detection technology has been widely used

but it is still lacking in effective and unified principles on performance calibration of the UHF PD detection system. In order to quantitatively calibrate the characteristics of the UHF sensor and detection system

the calibration platform of partial discharge UHF detection based on gigahertz transverse electromagnetic（GTEM） cell was designed

and the effects of three factors on the structure of a typical installation of sensors and detection system performance were studied. The results show that the impact sensor mounting structure on the actual reception performance is very significant

in the range of 300

1

500 MHz

three sensors mounting structure equivalent height are 10.8 mm

10.2 mm

and 3.3 mm

respectively. Sensitivity of

corresponding UHF detection systems are 2.8 μV/mm

2.9 μV/mm and 36.7 μV/mm

respectively

the difference is significant. So

sensor mounting structure factors specific integrated assessment must be considered in sensor calibration and evaluation of UHF partial discharge detection system performance.