Method for evaluating suitable degassing time of XLPE flat plate sample or cable

A flat sample, time technology, applied in the field of high voltage and insulation, can solve problems such as difficulty in estimation

Active Publication Date: 2020-12-11
ZHEJIANG UNIV +1
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  • Abstract
  • Description
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the suitable degassing time of XLPE flat sample or cable insulation is difficult to estimate due to the influence of thickness and degassing temperature, and provide a method for judging the suitable degassing time of flat sample and XLPE cable. Estimation of efficient and suitable degassing treatment time for dielectric property testing of XLPE cable materials and modification of insulating materials

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  • Method for evaluating suitable degassing time of XLPE flat plate sample or cable
  • Method for evaluating suitable degassing time of XLPE flat plate sample or cable
  • Method for evaluating suitable degassing time of XLPE flat plate sample or cable

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Embodiment Construction

[0064] The content of the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.

[0065] Step 1, such as figure 2 Shown is a schematic diagram of the preparation of samples by XLPE flat hot pressing method. The XLPE sample is prepared by the standard flat hot pressing method. In this embodiment, a stainless steel plate with 4 hollow squares is selected as the mold. The mold is 25×25×0.2mm, and the hollow size is 10×10×0.2mm; each square Put about 2.5g of XLPE particles into the mold and evenly disperse in the mold. The upper and lower surfaces of the mold are covered with PET. Put the mold on the flat clamp and put it into the vulcanizer together; Under pressure, vulcanize at 180 degrees for 15 minutes, then cool the mold, take out the samples, and prepare 8 samples in total.

[0066] Since the thickness of the flat sample is far smaller than the length and width of the sample, the diffusion of the cr...

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Abstract

The invention discloses a method for evaluating the suitable degassing time of an XLPE flat plate sample or a cable. The method comprises the following steps: (1) preparing / selecting a sample; (2) performing sample pretreatment; (3) degassing treatment; (4) constructing an evaluation model; and (5) evaluating the degassing time. According to the method, the weight change rule of the samples is obtained through the degassing weight loss ratios of the multiple samples of the same specification, the weight loss change rate parameters are calculated with the average weight loss ratio as the reference, then the suitable degassing time is obtained, the method can accurately evaluate the suitable degassing time of various different XLPE formula materials, and the test method is simple, convenientto operate and high in universality. According to the method, the time for researchers to carry out heat treatment on the XLPE sample can be greatly shortened, the scientific research efficiency is improved, the degassing time cost of a cable manufacturer can also be reduced, and a scientific and effective analysis means is provided for XLPE material analysis and cable production in the aspect ofavoiding the influence of cross-linking by-products.

Description

technical field [0001] The invention belongs to the technical field of high voltage and insulation, in particular to a method for evaluating the suitable degassing time of an XLPE flat sample or cable. Background technique [0002] With the continuous acceleration of my country's urbanization process and sustained and rapid economic development, the demand for power consumption is increasing day by day, and there is an urgent need to upgrade and transform the existing grid infrastructure to meet the rapidly growing demand for power transmission. At the same time, with the increasing demand for offshore wind power and island power supply, power cables have become one of the key power equipment for building comprehensive underground energy channels in cities, realizing long-distance large-capacity power transmission and large-scale utilization of new energy power. At present, my country is investing heavily in the construction of infrastructure to meet the development requirem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20G01N5/04G01N1/28
CPCG01N1/28G01N1/286G01N5/04G01N25/20
Inventor 陈向荣孟繁博戴超张梦甜丰如男张永明
Owner ZHEJIANG UNIV
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