Wideband dielectric impedance spectroscopy method-based XLPE cable insulating property assessment method

Abstract

The present invention relates to a wideband dielectric impedance spectroscopy method-based XLPE cable insulating property assessment method. The technical characteristic is that the method comprises the steps of processing an XLPE cable insulating sample into a wafer-shaped sample; cleaning the wafer-shaped sample in the absolute ethyl alcohol, and then carrying out the ultrasonic cleaning processing; coating the conductive silver colloids in the circular areas at the symmetrical positions of the upper and lower surfaces of the wafer-shaped sample; carrying out the wideband dielectric frequency spectrum test after the conductive silver colloids dry; comparing and analyzing the wideband dielectric frequency spectrum test results to obtain an XLPE cable insulating property assessment result.The method of the present invention can carry out the wideband dielectric impedance spectroscopy test on the XLPE cable insulating sample, analyzes the insulating aging performance of the XLPE cableinsulating sample and avoids the influence of the human subjective factors, and a test result determination method is simple, convenient and rapid, is high in accuracy, provides the technical supportfor accurately assessing the service life of an electric power cable and improving the service life of the electric power cable and has the important significance for improving the cable power supplyreliability and reducing the operation and maintenance cost.

Description

technical field [0001] The invention belongs to the technical field of evaluating the insulating performance of cross-linked polyethylene, in particular to a method for evaluating the insulating performance of XLPE cables based on broadband dielectric impedance spectroscopy. Background technique [0002] XLPE cables entered China in the late 1970s and were gradually popularized and applied on a large scale. Some medium-voltage XLPE cables have been in operation for more than 30 years and have gradually entered the "middle-aged and old age" of the cable's operating life. As cities have higher and higher requirements for power supply quality and reliability, accurate evaluation of the insulation performance of XLPE cables is of great significance for preventing cable accidents, extending cable service life, improving cable power supply reliability, and reducing operation and maintenance costs. At present, there is no recognized on-line detection technology and corresponding eq...

AI Technical Summary

Problems solved by technology

At present, there is no recognized on-line detection technology and corresponding equipment for testing the aging performance of XLPE insulation that can be popularized and applied in the power sector.

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