On-line partial discharge defected phase selection and localization in cross-bonded single core cables

In this paper, a practical rule-based guideline has been presented for on-line detection of partial discharge (PD) defected phase (i.e., phase selection) followed by discriminating PD defected cable section (i.e., localization) in cross-bonded single core cable networks. Both goals are met by relying on the proposed rules that take the advantages of an energy-based index, calculated/measured at different junctions of cable network. The whole process provides practicability needs, as it requires neither synchronized measurements at different junctions of a network nor any PD pulse detection. Moreover, the proposed procedure derives the required indices from the measurements out of the link boxes, which provides enough safety in practical applications. Simulating and investigating four popular cross-bonding schemes (including sectionalized and continuous by coaxial cable and single core cable) as well as various characteristics of PD sources, different source locations, and noisy condition have proven acceptable performance of the proposed method in both tasks of phase selection and localization.