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http://dx.doi.org/10.5762/KAIS.2020.21.5.672

A Control Method of Phase Angle Regulator for Parallel-Feeding Operation of AC Traction Power Supply System  

Lee, Byung Bok (Department of Railway Electrical & Signaling Engineering, Seoul National University of Science & Technology)
Choi, Kyu Hyoung (Department of Railway Electrical & Signaling Engineering, Seoul National University of Science & Technology)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.21, no.5, 2020 , pp. 672-678 More about this Journal
Abstract
The parallel-feeding operation of an AC traction power supply system has the advantages of extending the power supply section and increasing the power supply capacity by reducing the voltage drop and peak demand caused by a train operation load. On the other hand, the parallel-feeding operation is restricted because of the circulating power flow induced from the phase difference between substations. Moreover, the power supply capacity is limited because of the unbalanced substation load depending on the trainload distribution, which can be changed by the train operation along the railway track. This paper suggests a Thyristor-controlled Phase Angle Regulator (TCPAR) to reduce the circulating power flow and the unbalanced substation load, which depends on the phase difference and the trainload distribution and provides a feasibility study. A dedicated control model of TCPAR is also provided, which uses substation power supplies as the input to control the circulating power flow and an unbalanced substation load depending on the phase difference and the trainload distribution. Simulation studies using PSCAD/EMTDC shows that the proposed TCPAR control model can reduce the circulating power flow and the unbalanced substation load depending on the phase difference and the trainload distribution. The proposed TCPAR can extend the parallel-feeding operation of an AC traction power system and increase the power supply capacity.
Keywords
Traction Power Supply; Parallel-Feeding; Circulating Power; Unbalanced Substation Load; TCPAR;
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