HIGH-SENSITIVITY DIAGNOSTIC METHOD FOR LOCAL DEFECTS OF POWER CABLE

The disclosure discloses a high-sensitivity diagnostic method for local defects of a power cable. This method realizes the positioning of the local defects of the power cable by measuring and analyzing the reflection coefficient spectrum of the power cable in combination with a strobing gate technol...

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Bibliographic Details
Main Authors Li, Yuan, Zhang, Tao, Meng, Pengfei, Li, Zerui, Gong, Wei, Kong, Jiamin, Zhou, Kai, Ran, Li, Zhu, Guangya
Format Patent
LanguageEnglish
Published 24.12.2020
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
TRANSMISSION
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Summary:The disclosure discloses a high-sensitivity diagnostic method for local defects of a power cable. This method realizes the positioning of the local defects of the power cable by measuring and analyzing the reflection coefficient spectrum of the power cable in combination with a strobing gate technology and a modem digital processing technology based on a frequency-domain power cable reflection coefficient spectrum, then the wave velocity of the tested cable obtained by a real part or an imaginary part of the transformed reflection coefficient spectrum is compared with the wave velocity of a new cable, and meanwhile the severity of the local defect is estimated in combination with a difference between a transformed reflection coefficient spectrum amplitude and a corresponding model fitting curve. Compared with the prior art, the disclosure can not only realize location and multi-defect identification of local defects with weak change degree but also assess the severity of the local defects of the power cable.
Bibliography:Application Number: AU20200103078