Simulation tools are crucial to efficiently design the infrastructures and operations of DC electrical railway systems, including potential innovative technologies such as reversible traction power substations and energy storage systems. For this purpose, it is essential to accurately estimate the evolution of the voltage and power flows within the DC traction network, with fast computation time. This study, therefore, proposes a new simulation approach for fast and accurate voltage estimation and power flow analysis of DC railway systems. It is based on the use of non-linear switched models for traction power substations and trains. The modified nodal analysis is extended to consider such models, including the voltage drop control of the different subsystems, avoiding the necessity to use complex numerical iterative solvers. This new approach is validated and compared to an existing dynamical model and a conventional static model. The comparisons prove the relevance of the new approach, which provides validated and accurate results (<2% error compared to the validated dynamical model) with fast computation time (speed up of 500 compared to the dynamical model). It can, therefore, be used to study, design, size, and optimise DC traction systems with new technologies aimed at saving braking energy.
Non-linear switched model for accurate voltage estimation and power flow analysis of DC railway systems
IET Electrical Systems in Transportation ; 10 , 4 ; 425-435
2020-11-19
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
traction trains , traction power supplies , braking energy saving , innovative technologies , accurate voltage estimation , nonlinear switched models , DC electrical railway systems , voltage control , energy conservation , railway electrification , substations , braking , load flow , traction power substations , optimisation , voltage drop control , power flow analysis , DC traction network , modified nodal analysis
Metadata by IET is licensed under CC BY 3.0
Voltage regulation on 25 kV AC railway systems by using thyristor switched capacitor
Tema Archiv | 2000
|Sequential linear power flow solution for AC electric railway power supply systems
British Library Conference Proceedings | 2002
|Accurate Large Signal Modeling of Zero-Voltage Zero-Current Switched Full-Bridge PWM Converter
British Library Conference Proceedings | 1998
|Accurate Large Signal Modeling of Zero-Voltage Zero-Current Switched Full-Bridge PWM Converter
British Library Online Contents | 1998
|