KIEE - The Transactions of the Korean Institute of Electrical Engineers

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The Transactions of the Korean Institute of Electrical Engineers

The Transactions of the Korean Institute of Electrical Engineers

ISO Journal TitleTrans. Korean. Inst. Elect. Eng.

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Title	Field Study on Output Voltage Variations in DC Traction System Substations
Authors	윤치명(Chi-Myeong Yun) ; 민명환(Myung-Hwan Min)
DOI	https://doi.org/10.5370/KIEE.2025.74.4.712
Page	pp.712-716
ISSN	1975-8359
Keywords	DC traction system; Energy efficiency; Regenerative energy; Field study; Voltage control
Abstract	In this paper, we analyzed the change in energy efficiency according to the output voltage of the substation before applying a device capable of active control such as electronic OLTC to the power traction system. The energy efficiency improvement for each situation was simulated by assuming two situations when the voltage was raised and when the voltage was lowered. Two railway operators compared the results of field measurement tests with the results using PSCAD/EMTDC, a power analysis program, to prove the improvement of energy efficiency according to voltage changes.

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