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Method for determining influence of mechanical force and thermal ageing on dielectric properties of silicone rubber

A technology of dielectric properties and silicone rubber, which is applied in the field of high voltage and insulation, and can solve problems such as imperfections

Inactive Publication Date: 2017-12-12
HARBIN UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

For the relationship between this force and the dielectric strength of insulating materials, the current research is not perfect.

Method used

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Experimental program
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Effect test

Embodiment Construction

[0014] The method for determining the impact of mechanical force and thermal aging on the dielectric properties of silicone rubber of the present invention comprises the following steps:

[0015] Step 1. Test the influence of pressure and temperature on the dielectric properties of silicone rubber; heat the three groups of samples to three temperature points of 30°C, 50°C, and 70°C respectively, then fix the samples on the electrode holder, and adjust the high-voltage electrode The pressure between the ground electrode and the ground electrode is 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa; after connecting the line, put the electrode frame as a whole into silicone oil to test the breakdown performance;

[0016] Step 2: Test the influence of pressure and temperature on the surface breakdown strength of silicone rubber; use a vacuum coating machine to vapor-deposit two circular electrodes with a diameter of 2 cm on the XLPE sample, and the distance between the centers of the two circles is 2...

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Abstract

The invention discloses a method for determining influence of mechanical force and thermal ageing on dielectric properties of silicone rubber and belongs to the technical field of high voltage and insulation. The method disclosed by the invention comprises the following steps: 1, testing influences of pressure and temperature on dielectric properties of silicone rubber; 2, testing influences of pressure and temperature on surface breakdown strength of the silicone rubber; 3, testing the influence of tension on electrical tree aging of the silicone rubber; 4, testing influences of tension and temperature on breakdown strength of the silicone rubber; 5, performing thermal ageing test; 6, collecting and analyzing data, forming a form and a numerical distribution map, and determining the influences of mechanical force and thermal ageing on dielectric properties of the silicone rubber. According to the method for determining the influences of mechanical force and thermal ageing on dielectric properties of the silicone rubber disclosed by the invention, effective determination of the mechanical force and thermal ageing on the dielectric properties of the silicone rubber can be completed.

Description

technical field [0001] The invention relates to a method for judging the dielectric properties of silicone rubber, in particular to a method for judging the influence of mechanical force and thermal aging on the dielectric properties of silicone rubber, and belongs to the technical field of high voltage and insulation. Background technique [0002] High-voltage direct current transmission has the advantages of small line loss, long transmission distance, convenient and flexible power regulation, and large transmission capacity, so it is widely used in the world. Cooperating with power electronics technology, flexible DC transmission is becoming more and more mature, which solves some problems existing in traditional DC transmission; therefore, it is more widely used in asynchronous grid land interconnection, large city power supply capacity expansion, and isolated load power supply. But as far as the current DC cable lines are put into operation, the cable accessories are th...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R31/20
Inventor 刘忠奇张沛红
Owner HARBIN UNIV OF SCI & TECH
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