Development of a Novel Sequence Component-Based Method for the Faults Analysis in Unbalanced Power Distribution Networks
Article
Suresh, A, Murari, K, Kamalasadan, S et al. (2025). Development of a Novel Sequence Component-Based Method for the Faults Analysis in Unbalanced Power Distribution Networks
. IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 10.1109/TIA.2025.3601101
Suresh, A, Murari, K, Kamalasadan, S et al. (2025). Development of a Novel Sequence Component-Based Method for the Faults Analysis in Unbalanced Power Distribution Networks
. IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 10.1109/TIA.2025.3601101
The conventional sequence component-based fault analysis technique is renowned for its precision when applied to balanced networks, particularly in the context of transposed transmission networks. However, its efficacy diminishes when dealing with unbalanced distribution networks characterized by single-phase or two-phase laterals, mutual coupling effects, unbalanced loads, and untransposed lines. These factors challenge the fundamental assumption underlying the classical sequence component method for fault computations in distribution networks. This paper introduces an innovative sequence component-based fault analysis tailored for three-phase unbalanced power distribution systems featuring untransposed lines, voltage control devices, multiphase laterals, and various transformer connections. The proposed approach includes a derived algorithm for fault current computation during single-line-to-ground faults, threephase-ground faults, line-line faults, and double line to ground faults. To validate its accuracy and effectiveness, the algorithm has been tested on multiple distribution feeders, including the IEEE 4-node, 13-node, 34-node, and 123-node feeders. It has been demonstrated that the proposed approach is more accruate and robust when compared to the state-of-the-art and thus applicable for field implementation.
