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| Key Problems Faced by Defect Diagnosis and Location Technologies for XLPE Distribution Cables |
| Shan Bingliang, Li Shuning, Yang Xiao, Wang Wei, Li Chengrong |
| State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China |
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Abstract Cross-linked polyethylene (XLPE) cables are widely used in urban power distribution systems owing to their excellent performance. To ensure the operational reliability and economy of distribution network, it is a major challenge for accurate status diagnosis of the ageing XLPE distribution cables since part of them in service are approaching or have exceeded their design life. This paper analyzed the validity typical defect diagnostic methods and location technologies in the application of status diagnosis for XLPE distribution cable in field operation deeply, and pointed out the key problems existing in defect diagnosis sensitivity and location accuracy in long cables, identification and localization of aging cable segments and concentration defects and so on. On the basis, suggestions are given from the aspects of improving the sensitivity of concentration defect diagnosis in the cable, realizing accurate defect localization for long cables, studying on the diagnosis and localization for local aging cable segments, etc.
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Received: 10 June 2021
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2021, Vol. 36 
