A non-contact insulating medium response automatic testing method and an electrode box for testing

Abstract

The invention relates to a non-contact insulating dielectric response automatic testing method, which belongs to the technical field of frequency domain dielectric response testing, comprising the following steps: S1: Pre-measurement: for the same dielectric material, the combination of measuring samples and air gaps with different thicknesses Response and get the frequency response characteristic curve; S2: Limit fitting: using the frequency response characteristic data obtained in the pre-measurement, the air gap thickness is used as the independent variable, and the air gap thickness is zero when the air gap thickness is zero at the same frequency point through surface fitting. Frequency response characteristics; S3: For subsequent insulating material samples, the thickness of a single air gap is used for routine measurement, and the dielectric properties of the sample material after eliminating the influence of the air gap are obtained through the frequency domain dielectric response curve obtained in steps S1 and S2.

Description

technical field [0001] The invention belongs to the technical field of frequency-domain dielectric response testing, and relates to a non-contact insulating dielectric response automatic testing method and an electrode box for testing. Background technique [0002] The measurement of dielectric response in frequency domain is a very important part in high voltage technology. It puts the insulating medium between the electrode plates, and obtains the dielectric properties of the medium by measuring the response of the insulating medium under different frequency excitations, so as to evaluate the performance parameters such as the aging degree of the medium. [0003] The traditional measurement method uses a measurement method in which both electrodes are in contact with the medium. Generally speaking, it is necessary for the two electrodes to exert a certain pressure on the test sample, so that the electrodes and the test sample can be in close contact, and the gap between th...

AI Technical Summary

Problems solved by technology

The air has fluidity and inhomogeneity, so the test results will fluctuate accordingly, which greatly reduces the test accuracy. The properties of the air must be very stable to achieve good measurement results

Moreover, the thickness of the air layer will also directly affect its dielectric properties, thereby affecting whether it can be used as a benchmark standard.

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