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Method for assessing insulation aging state of cable

An aging state and cable insulation technology, applied in the field of electrical insulation, can solve problems such as limited popularization and application, evaluation impact of aging state, data errors, etc., to achieve the effect of avoiding result deviation and accurate evaluation of aging state

Inactive Publication Date: 2016-04-13
SHENZHEN POWER SUPPLY BUREAU +1
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  • Abstract
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  • Application Information

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Problems solved by technology

However, this evaluation method is only based on a mechanical parameter elongation at break, which cannot fully reflect the aging state, and the measured data will also have errors, which will affect the evaluation of the aging state.
These disadvantages also limit the generalization and application of this method.

Method used

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  • Method for assessing insulation aging state of cable
  • Method for assessing insulation aging state of cable
  • Method for assessing insulation aging state of cable

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] like Figure 1-Figure 16 Shown is Embodiment 1 of the cable insulation aging state evaluation method of the present invention.

[0033] An embodiment of the present invention provides a method for evaluating the aging state of cable insulation, which includes the following steps: slice the cable sample, select two temperature points of 140°C and 160°C for thermal aging, and take out the sample after aging and place it at room temperature Place it for 24 hou...

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Abstract

The invention discloses a method for assessing insulation aging state of a cable. The method comprises the following steps: slicing a cable sample, performing thermal ageing at two temperature points of 140 DEG C and 160 DEG C, taking out the sample after completely ageing and standing by for 24h at room temperature; performing tensile test, differential scanning calorimetry test, infrared spectroscopy test and thermal gravity test on the sample after ageing, and acquiring the related data parameters; and representing the insulation aging state of the cable according to the data parameters, so as to assess the insulation aging state of the cable. According to the method for assessing the insulation aging state of the cable, provided by the invention, the result deviation caused by measurement error can be avoided and the assessment for the aging state is more accurate.

Description

technical field [0001] The invention relates to the field of electrical insulation, in particular to a method for evaluating the aging state of cable insulation based on a multi-parameter extraction processing scheme. Background technique [0002] The aging of cable insulation is an important factor affecting the electrical performance of cables. Therefore, the aging state and insulation life evaluation of the actual operating cables is a matter of great concern in the industry. [0003] The single factor elongation at break method is the main experimental method commonly used to evaluate the insulation of XLPE cables. The single factor elongation at break method is a simple and intuitive method for judging the insulation state of cables. Cut the cable into slices, then process it into a dumbbell-shaped sample, carry out multiple tensile tests, and calculate the average value of the measured elongation at break. When the elongation at break decreases to 50% of the origina...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/20
CPCG01N33/20
Inventor 申作家詹威鹏陈腾彪罗智奕褚学来张旭周福升李欢余盈荧李茜李建英
Owner SHENZHEN POWER SUPPLY BUREAU
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