Device and method for united aging of multi-group piece-shaped samples under voltage temperature gradient

Abstract

The invention discloses a device and method for united aging of multi-group piece-shaped samples under voltage temperature gradient. The device comprises an upper electrode, a lower electrode, a first constant temperature source, a second constant temperature source, a high-voltage direct-current power supply and a circuit protection device, wherein the upper electrode is used for being in contact with one side of each aged piece-shaped sample; the lower electrode is used for being in contact with the other side of each tested insulating material piece-shaped sample; the first constant temperature source is used for conducting the temperature to the upper electrode; the second constant temperature source is used for conducting the temperature to the lower electrode; the high-voltage direct-current power supply is used for controlling voltage of the upper electrode; and the circuit protection device is used for protecting a device in a circuit and the piece-shaped samples having not undergone breakdown. The device and the method are used for performing united aging on the multi-group piece-shaped samples under a high-voltage direct-current electric field and a temperature gradient field.

Description

technical field [0001] The invention belongs to the technical field of aging of polymer insulating materials, and relates to an aging method for insulating materials in high-voltage DC power equipment under the condition that there is a temperature difference between the electric field and the inside of the material, and specifically relates to a multi-group sheet-shaped sample under high-voltage conditions. Combined aging device and method under temperature gradient. Background technique [0002] Insulation materials in power equipment have been subjected to the combined effects of electricity and heat for a long time, especially under the DC electric field, the space charge effect under the DC voltage and the temperature gradient effect, which seriously affect the long-term service life of the DC insulation. In order to study the long-term reliability of DC insulation, the current method commonly used at home and abroad is to conduct electric-thermal joint aging tests, but...

AI Technical Summary

Problems solved by technology

[0004] Insulation materials in DC power equipment work under the combined action of temperature difference inside and outside and DC electric field, and the resistivity of insulation materials has a nonlinear relationship with temperature, so the electric field distribution in real DC equipment insulation may be different from the electric field at conventional uniform temperature There is a large difference in the distribution, which directly affects the aging results of the insulating dielectric material

[0005] In addition, the existing aging system will stop working when one of the aged multi-piece sheet samples breaks down, which will greatly affect the efficiency of the aging process

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