Ultra-high frequency partial discharge sensor performance test tool and device based on GTEM cell

Abstract

The invention relates to an ultrahigh frequency partial discharge sensor performance test tool and device based on a GTEM cell, the tool comprises a fixing ring, a flange plate, a clamping assembly and an angle adjusting assembly, the flange plate is installed in the inner ring of the fixing ring and can rotate in the circumferential direction of the inner ring of the fixing ring; the multiple clamping assemblies are evenly distributed on the edge of the flange plate in the circumferential direction of the flange plate, the radial distance of the clamping assemblies is adjustable, when a sensor is installed, the multiple clamping assemblies make contact with the side face of the sensor and clamp the sensor, and the angle adjusting assembly is arranged on the flange plate and the fixing ring. The angle adjusting assembly is used for adjusting the rotation angle of the flange plate relative to the fixing ring and fixing the position of the flange plate. Compared with the prior art, the position and the angle of the sensor can be accurately adjusted, and the problem that an existing testing method is poor in result consistency is solved.

Description

technical field [0001] The invention relates to the technical field of UHF partial discharge testing, in particular to a GTEM cell-based performance testing tool and device for UHF partial discharge sensors. Background technique [0002] UHF partial discharge detection technology is an important method for early fault detection, fault diagnosis and location of power equipment. The UHF partial discharge sensor is a broadband antenna working at 300MHz to 3000MHz. Relevant standards stipulate the technical specifications and test methods of UHF partial discharge live detection instruments, including the effective height performance index of UHF partial discharge sensor and the performance index of detection instrument. In the performance test, the average effective height of the sensor between 300MHz and 1500MHz should not be less than 8mm, and the minimum effective height should not be less than 3mm. [0003] The measurement and calibration system based on the GTEM cell curre...

AI Technical Summary

Problems solved by technology

Under the existing measurement method, the sensor is directly installed in the installation hole of the GTEM cell through a mounting plate, and the position where the sensor is installed by different testers is not fixed. This test method has low accuracy and consistency of test results. Poor, the test results are greatly affected by external factors, which is not conducive to sensor performance verification, evaluation and comparative analysis

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