Abstract
Based on the features of zero-sequence components when single-phase line in the distribution network connected with new energy grounding, including parallel lines, a line selection method in view of the sum of vectors about the zero-sequence current at both ends is proposed in this paper. Firstly, using the zero-sequence current measured at the initial end of each line, the current with the largest amplitude and negative direction is identified as the uncertain current. If the uncertain current is in an independent line, it is the faulty line. If the suspected faulty line is a line group containing parallel lines, then the sum of vector about the zero-sequence current at the both ends in the line group is further calculated. The line which has the largest magnitude of the zero-sequence current vector sum at both ends and have negative direction is the faulty line in the parallel line group. The RTDS simulation verifies that this method can effectively conquer the influence of unbalanced current, make line selection more accurate, and improve the safety and dependability of the distribution network.
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Acknowledgements
This work was supported by State Grid Jiangsu Electric Power Company Science and Technology Project. (SGJSXZ00FCJS1901022).
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Deng, T., Sun, S., Chen, S. (2021). Single-Phase Ground Fault Line Selection Based on RTDS Simulation for Network with New Energy Accessed. In: Xu, Z., Parizi, R.M., Loyola-González, O., Zhang, X. (eds) Cyber Security Intelligence and Analytics. CSIA 2021. Advances in Intelligent Systems and Computing, vol 1343. Springer, Cham. https://doi.org/10.1007/978-3-030-69999-4_21
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DOI: https://doi.org/10.1007/978-3-030-69999-4_21
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