Temperature controllable PEA space charge test device

Abstract

The invention belongs to the high voltage and insulation technical field, in particular relates to a temperature controllable PEA space charge test device. The test device is composed of an upper electrode, a lower electrode, a space charge collecting channel and a temperature control measuring unit. A groove-shaped lower electrode is inlaid in a lower electrode insulation clapboard, the lower electrode insulation clapboard is inlaid in a lower electrode clapboard, so as to form the lower electrode, a piezoelectric sensor is adhered on the lower surface of the groove-shaped lower electrode tocollect space charge, a voltage signal transmitted by a metal film coated organic glass column is displayed by an oscilloscope, the heating coil of the temperature control measuring unit is coated inthe outer side of the groove-shaped lower electrode to heat the groove-shape lower electrode, so as to provide a temperature field for a sample, a platinum resistor is inlaid in the bottom surface ofthe groove-shaped lower electrode to measure the temperature of the sample, and the platinum resistor is connected with a computer by virtue of a thermodetector. The invention can measure dielectric medium space charge under different temperature conditions, so that researching on dielectric medium space charge characteristic can be realized, thus being especially applicable to test and research of electrical insulating material.

Description

technical field [0001] The invention belongs to the technical field of high voltage and insulation, in particular to a temperature-controllable PEA space charge testing device. Background technique [0002] Space charge is an important parameter to characterize the electrical properties of dielectric materials, and the measurement of space charge is of great significance to the study of dielectric properties of dielectrics. At present, it is generally recognized internationally that space charges have a distortion effect on the electric field, and the distribution and movement of space charges have a strong impact on the conductance, breakdown damage, and aging of insulating materials. Under the action of an electric field, especially a DC electric field, the accumulation of space charges will seriously distort the electric field distribution in the polymer insulating material, and cause the recombination and excitation of charges, which will lead to early damage to the mate...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the prior art cannot realize the temperature-controllable PEA space charge test, and to provide a temperature-controllable PEA space charge test device for the test of the space charge of insulating materials under high temperature. The electrodes of the test device The structure includes four parts: the upper electrode, the lower electrode, the space charge collection channel and the temperature control measurement unit. The slot-shaped lower electrode 8 is embedded in the lower electrode insulating separator 18 upwards, and the lower electrode insulating separator 18 is embedded in the lower electrode separator 10. , the piezoelectric sensor 17 is attached to the lower surface of the groove-shaped lower electrode 8, the organic glass column 16 coated with metal film is placed under the piezoelectric sensor 17, and the insulating sleeve 13 covers the piezoelectric sensor 17 and the organic glass column coated with metal film 16 is placed in the shell 14 of the space charge collector 7, and the shell 14 of the space charge collector is fixedly connected to the lower surface of the groove-shaped lower electrode 8 to compress the piezoelectric sensor 14, the metal-coated plexiglass column 16 and the insulating sleeve 13, The upper surface of the trough-shaped lower electrode 8 is the lower electrode plane, the left bracket 23 and the right bracket 24 are fixed under the lower electrode separator 10 to support the whole device, and the charge signal SMA coaxial socket 15 is fixedly connected to the space charge collector shell 14 In the central round hole, the inner conductor of the charge signal SMA coaxial socket 15 passes through the insulating sleeve 13 and is in reliable electrical contact with the metal film on the lower surface of the metal-coated plexiglass column 16, and the charge signal preamplifier 12 is fixed on the lower electrode separator On the lower surface of 10, the input end of the charge signal preamplifier 12 is connected to the charge signal SMA coaxial socket 15, and the output end is connected to the charge signal SMA coaxial plug 11 fixed on the left side bracket 23 or the right side bracket 24;

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