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Fault Location for Underground Power Cable Using Distributed Parameter Approach

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5 Author(s)
Xia Yang ; Dept. of Electr. Eng., Myongji Univ., Yongin ; Myeon-Song Choi ; Seung-Jae Lee ; Chee-Wooi Ten
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This paper proposes an extensive fault location model for underground power cable in distribution system using voltage and current measurements at the sending-end. First, an equivalent circuit that models a faulted underground cable system is analyzed using distributed parameter approach. Then, the analysis of sequence networks in three-phase network is obtained by applying the boundary conditions. This analysis is used to calculate a fault distance in single section using voltage and current equations. The extension to multi-section is further analyzed based on Korean distribution systems. This method is an iterative process to determine a faulted section from the network. Finally, the case studies are evaluated with variations of fault distance and resistance, which also includes the evaluation of its robustness to load uncertainty.

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Power Systems, IEEE Transactions on  (Volume:23 ,  Issue: 4 )