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Evaluation method of insulating material aging experimental device based on electro-thermal coupling field

A technology of electrothermal coupling and insulating materials, which is applied in the field of high-voltage equipment, can solve problems such as polymer decomposition and polymer breakdown, and achieve the effect of temperature control and accuracy

Inactive Publication Date: 2019-07-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defects introduced during the production, manufacturing, transportation and installation of cable accessories will cause local electric field concentration under the action of an externally applied electric field, which can easily cause ionization and cause polymer decomposition. discharge channels, eventually leading to complete or incomplete breakdown of the polymer

Method used

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  • Evaluation method of insulating material aging experimental device based on electro-thermal coupling field
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  • Evaluation method of insulating material aging experimental device based on electro-thermal coupling field

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Experimental program
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Embodiment Construction

[0047] Specific examples are given below in conjunction with the accompanying drawings to further illustrate how the insulation material aging test device and method based on the electrothermal coupling field of the present invention are realized.

[0048] Such as Figure 7 As shown, the present invention provides an insulating material aging test device based on an electrothermal coupling field, which is mainly composed of an experimental device, an electric tree branch observation device, a pulse power supply device and a terminal 1, and a ScreenRuler length measurement platform is arranged in the terminal 1, and the The electric branch observation device observes and records the change data of the sample in the experimental device, and transmits the data to the terminal 1, and the ScreenRuler length measurement platform in the terminal 1 measures the length of the electric branch.

[0049] Such as figure 2 As shown, the experimental device is used to manufacture different...

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Abstract

The invention discloses an evaluation method of an insulating material aging experimental device based on an electro-thermal coupling field. A method for effectively evaluating an insulation state ofan insulation material for a high-voltage direct-current power cable by using electric branch length is adopted. The evaluation method comprises steps that step1) an ethylene propylene rubber test sample based on a needle-plate electrode is prepared; step2) an electro-thermal coupling field testing device is used to carry out an experiment; step3) the aging condition of the electric tree branch inside the test sample is observed by using an electric tree branch observation device; step4) calculation is carried out by using a ScreenRuler virtual ruler. The experimental temperature is controllable and accurate, and the actual operation condition of the high-voltage direct-current power cable in actual operation is effectively simulated.

Description

technical field [0001] The invention belongs to the field of high-voltage equipment, and in particular relates to an evaluation method of an insulating material aging experiment device based on an electrothermal coupling field. Background technique [0002] With the rapid development of the power industry and the expansion of the grid scale, the requirements for power transmission are getting higher and higher. Cables have been widely used in power transmission and distribution networks such as urban power grid transformation and submarine cable power transmission. In recent years, ethylene-propylene rubber has been widely used as an inner insulating material in prefabricated cable accessories due to its excellent mechanical and electrical properties. However, the structure of cable accessories is very complicated, and impurities are inevitably mixed in the process of insulating material preparation or extrusion molding of cable accessories, forming defects such as air gaps,...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N1/44G01B11/02G01K7/02G01R31/12G01R31/20
CPCG01N21/84G01N1/44G01B11/02G01K7/02G01R31/1272G01R31/20G01N2021/8472
Inventor 杜伯学赵贯蜚苏金刚田猛朱乐为韩涛
Owner TIANJIN UNIV
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