An energy-saving strategy for the high-speed railway with gradient-based trajectory optimization and regenerative energy storage technologies

Le résumé fourni par la source

This study aims to reduce the energy consumption of the traction power supply systems (TPSSs) within high-speed railways (HSRs). The refined energy consumption of the TPSS in HSRs, including various energy consumers involved in the traction drive systems (TDSs) and wheel-track motion systems (WTMSs) in moving high-speed trains (HSTs), and traction power supply networks (TPSNs), is investigated. Through extensive simulations and sensitivity analyses, the study assesses the impacts of typical factors on total energy consumption, revealing technical speed as the most influential factor. On this basis, an energy-saving strategy is proposed that combines a gradient-based trajectory optimization (GBTO) algorithm and a wayside railway energy storage system (WRESS). The GBTO algorithm targets train-level energy conservation, optimizing HST operations to avoid unnecessary regenerative braking during downhill operation and leveraging the eco-driving constant-speed control strategy. The WRESS, which reuses surplus regenerative braking energy, exhibits network-level energy conservation. Moreover, a dynamic power flow algorithm for the WRESS-connected TPSS is used to evaluate the refined energy-saving performance. Finally, the effectiveness of the proposed energy-saving strategy is verified through two typical case studies.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.