Abstract
Substations of electrified railway power supplying systems injects hazardous negative-sequence current into utility grid deteriorating its power quality. This paper presents a novel method which is using untransposed overhead transmission lines can effectively reduce negative-sequence current injected by electrified railway substation, by which asymmetry factor of current is suppressed. The asymmetry of 3-phase untransposed power lines can compensate the asymmetric railway car traction load in some degree. A model of transmission lines and railway traction load was established to search for optimal terminal connection and transmission line placing pattern. High accuracy power flow calculation was conducted to evaluate other character of untransposed lines, which proved its effectiveness.
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Liu, Z., Han, Z., Gao, S. (2022). Using Untransposed Overhead Lines to Reduce Negative Sequence Current Injected by Railway Substation. In: Jia, L., Qin, Y., Liang, J., Liu, Z., Diao, L., An, M. (eds) Proceedings of the 5th International Conference on Electrical Engineering and Information Technologies for Rail Transportation (EITRT) 2021. EITRT 2021. Lecture Notes in Electrical Engineering, vol 864. Springer, Singapore. https://doi.org/10.1007/978-981-16-9905-4_54
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DOI: https://doi.org/10.1007/978-981-16-9905-4_54
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