Abstract
This two-part paper proposes a revised method for calculating HV (High Voltage) cable sheath currents, and for fault location of cross-bonded HV cable systems. The equivalent circuit and the cable impedance per unit length under short-circuit fault conditions are revised from those under non-fault conditions. Part 1 of this paper proposes a revised phasor domain mathematical model for the sheath current calculation under fault conditions, following demonstration that short-circuit faults can cause changes in the equivalent circuit of the cable metal sheath, and causing changes in the cable impedance per unit length. The calculation results, as given in a case study, show that there exists a unique relation between the fault position and the sheath fault currents, making it possible to locate a fault by analyzing the characteristics of the sheath currents during a fault. Part 2 of the paper focuses on the fault location method via sheath current monitoring.
Original language | English |
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Pages (from-to) | 1674-1683 |
Number of pages | 10 |
Journal | IEEE Transactions on Power Delivery |
Volume | 34 |
Issue number | 4 |
DOIs | |
Publication status | Published - 22 May 2019 |
Keywords
- circuit faults
- cable shielding
- power cables
- metals
- impedence
- conductors
- equivalent circuits