Investigation of a 25 kV–50 Hz Railway-Substation Power Supply Based on a Back-to-Back Modular Multilevel Converter Topology

This paper presents a preliminary study of a 25 kV–50 Hz railway substation power supply system. The control of a back-to-back converter based on modular multilevel converter (MMC) technology was investigated to fit with the power quality requirements of the application. One of the main challenges i...

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Bibliographic Details
Published inEnergies (Basel) Vol. 17; no. 6; p. 1318
Main Authors Tournoux, Kevin, Houari, Azeddine, Benkhoris, Mohamed Fouad, Terrien, Franck, Garmier, Pierre-Louis
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.03.2024
MDPI
Subjects
back-to-back converter
Electric current converters
Engineering Sciences
harmonics
Investigations
MMC converters
power quality
Power supply
Railroads
railway station
France
Europe
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Summary:This paper presents a preliminary study of a 25 kV–50 Hz railway substation power supply system. The control of a back-to-back converter based on modular multilevel converter (MMC) technology was investigated to fit with the power quality requirements of the application. One of the main challenges is the presence of constraining load conditions, under which the train circulation variability, low-frequency harmonics and critical power transients can notably decrease the power quality and lead to instability. In order to address this, cascaded controllers based on resonant controllers are proposed to ensure the desired performance. Furthermore, balancing voltage algorithms are added to avoid stress phenomena and additional losses in the studied power conversion interface. The paper presents the design of the control stages and demonstrates the robust performance of the system using a realistic loading condition of a railway substation.
ISSN:1996-1073
1996-1073
DOI:10.3390/en17061318