A Method for Evaluating the Aging State of XLPE Cable Insulation Based on Antioxidant Content
A cross-linked polyethylene and cable insulation technology, which is applied in the direction of measuring electricity, measuring electrical variables, and using optical methods to test, etc., can solve the problem of being unable to judge the aging state of cable insulation samples
Active Publication Date: 2020-10-27
XI AN JIAOTONG UNIV
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In order to overcome the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of method for evaluating the aging state of XLPE cable insulation based on antioxidant content, and this method can solve existing method and can't judge the cable insulation sample in the future. Aging state, and the technical problem that it is difficult to predict the moment when the cable insulation will seriously deteriorate. This method has the advantages of fast analysis speed, simplicity, non-destructive testing, and low requirements for sample preparation. It can quickly and accurately evaluate cable insulation for power companies. provide an important basis for the aging status of
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
[0029] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a crosslinked polyethylene cable insulation aging state evaluation method based on antioxidant content. The method which adopts Fourier transform infrared spectroscopy to obtain the content of antioxidant so as to well reflect the stability of cable insulation is a non-contact and lossless test method. The method specifically comprises the following steps of: preparing a certain number of flaky samples, carrying out aging treatment on the flaky samples for different times, collecting infrared spectra of background signals and sample signals by adopting the Fourier transform infrared spectroscopy, and extracting the absorbance of antioxidant characteristic peaks, wherein it is indicated that the larger the absorbance is, the higher the content of the antioxidant in the insulating material is. According to the invention, the antioxidant content is adopted to represent the insulation aging state of the cable, and the lower the antioxidant content is, the more serious the insulation aging of the cable is. The method is simple and easy to implement, and a new choice is provided for evaluation of the insulation aging state of the cable.
Description
technical field [0001] The invention belongs to the field of electrical insulation detection of electric power equipment, and relates to a method for evaluating the aging state of cross-linked polyethylene cable insulation based on the content of an antioxidant. Background technique [0002] With the expansion of the scale of the power system, the use of power cables has increased year by year, among which XLPE insulated cables have become the main force of medium and high voltage cables due to their excellent performance. During long-term operation, cable insulation materials will age due to various factors, and their mechanical, thermal, and electrical properties will deteriorate, threatening the safe and reliable operation of the power system. The design life of cross-linked cables is generally 30 to 40 years. At present, many cable lines in my country are in the middle and late stages of the design life. It is of great significance to evaluate the state of cable insulati...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12G01R31/20G01N21/3563
CPCG01N21/3563G01N2021/3572G01N2021/3595G01R31/1218G01R31/1272G01R31/20
Inventor 张媛媛李建英李盛涛高建王诗航侯宗克
Owner XI AN JIAOTONG UNIV