Optimizing Power Quality on High-Speed Rail Networks: Advances in Measurement and Evaluation Methods

¹ EREEC Laboratory, Department of Electrical Engineering, Mohammadia School of Engineering, Mohammed V University in Rabat, Morocco
² Advanced Systems Engineering Laboratory, National School of Applied Sciences (ENSA), Ibn Tofail University, Kenitra, Morocco
³ Laboratory of Industrial Engineering, Information Processing and Logistics, Hassan II University, Casablanca, Morocco

^* yassinetaleb@research.emi.ac.ma

Published online: 30 June 2025

Abstract

The necessity for a consistent technique to assess power quality in railway systems, that are distinct from transmission and distribution networks, is examined in this article. It evaluates whether current standards are suitable for identifying transient fluctuations and disruptions in railway networks driven by the 2×25Kv AC 50Hz network. The purpose is to present a standardized algorithm that can reliably detect disturbances in order to evaluate the quality of electricity on high-speed rail traction substations. A novel approach is put forth to more precisely describe voltage unbalances and the voltage harmonic distortion rate. An accurate estimate of the disturbance's amplitude and duration can be obtained by utilizing a short and adaptable integration period, as supported by empirical data. The suggested solution has been validated through field experiments and is integrated into equipment built on the 225 kV line that supplies the 2×25kV AC substation for high-speed trains. An analysis of the differences between the results obtained from high-speed train operations and the algorithm's ability to help standards committees review and update existing standards as well as expedite the development, approval, and implementation of new standards for railway installation is supported.