Publication
Dongho Choi, June-Seok Lee, and Changmu Lee, "Study on Configuration and Output Voltage Control Method for Active Railway Traction Substation Based on Modular Multilevel Converter," Journal of the Korean Society for Railway, vol. 26, no. 12, pp. 921-931, Dec. 2023.
2023
PEEMS
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Jan. 23, 2024
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1. Authors: Dongho Choi, June-Seok Lee, and Changmu Lee
2. Title: Study on Configuration and Output Voltage Control Method for Active Railway Traction Substation Based on Modular Multilevel Converter
3. Journal: Journal of the Korean Society for Railway
4. Vol/no/pp: vol. 26, no. 12, pp. 921-931
5. Date: Dec. 2023
6. Abstract
: This article introduces a configuration method for an active railway traction substation based on the modular multilevel converter (MMC) and analyzes the operating principles of the output voltage control methods. The AC railway power supply system in Korea performs voltage conversion through a Scott transformer, thereby encountering issues such as voltage drop due to traction line impedance, grid voltage imbalance, and harmonics. However, an active railway traction substation, by replacing the Scott transformer with MMC and applying power electronics-based control methods, can overcome these issues. Given the current scarcity of research on active railway traction substations in Korea, this article introduces a method for configuring an MMC-based active railway traction substation that aligns with the specifications of the domestic railway power supply system and elaborates on the comprehensive control methods. Specifically, the article presents control block diagrams of three distinct output voltage control methods for supplying voltage to the traction line and analyzes their operating principles. The operational validity of the active railway traction substation introduced in this article is verified through simulation.
- Dec. 9, 2024 Jeong-Yul Bang, Dongho Choi, and June-Seok Lee, “Abnormal Voltage Suppression Method for Multi-sampled Cascaded H-bridge Inverters Based on Phase-shifted PWM,” The Transactions of the Korean Institute of Electrical Engineers, vol.73, no.10, pp. 1678-1686, Oct. 2024.
- Oct. 3, 2023 Jeong-Yul Bang, Dongho Choi, Jin-Hyuk Park and June-Seok Lee, "Design and Verification of Partial Power DC-DC Converter for Hydrogen Fuel Cell Locomotive," The Transactions of the Korean Institute of Power Electronics, vol. 72, no. 9, pp. 1057-1065, Sep. 2023.