C. Mayet

Comparison of Different Models and Simulation Approaches for the Energetic Study of a Subway

This paper compares different models and simulation approaches for an energetic simulation of an automatic subway. For this purpose, several models are carried out from a dynamic model, which is validated by comparison with experimental measurements. Furthermore, two different simulation approaches are compared, i.e., backward and forward approaches. A simplified model is obtained and allows the reduction of the simulation time by 96 compared with the dynamic model by keeping an accuracy value of more than 99%.

Influence of an Energy Storage System on the Energy Consumption of a Diesel-Electric Locomotive

This paper studies the influence of an energy storage system (ESS) on the fuel consumption of a diesel-electric locomotive. First, an energetic model of a diesel-electric locomotive is established using energetic macroscopic representation (EMR). An inversion-based control is deduced, and the model is validated by experimental results on a real locomotive. Second, from this validated model, a battery/supercapacitor ESS is added in simulation to study the benefit of hybridization before integration on the real vehicle. The simulations show that simple energy management based on a frequency approach allows for the reduction of 25% on fuel consumption on a real drive cycle.

Energetic Macroscopic Representation and inversion-based control of the traction system of a hybrid locomotive

The EMR (Energetic Macroscopic Representation) of the traction system of a hybrid locomotive is presented. Different models are studied in order to be use for energy management of the entire system including energy storage subsystems. The simulation model is validated by comparison with experimental results.

Comparison of Different EMR-Based Models of Traction Power Substations for Energetic Studies of Subway Lines

Simulation is a valuable way to develop cleaner transportation systems. Nevertheless, the complexity of this kind of system leads to complex models, particularly when taking into account nonlinear aspects of traction power substations (TPSs). Thus, this paper proposes different TPS models based on energetic macroscopic representation. An appropriate model is deduced from comparisons between the different models to realize energetic studies. It is finally applied to the simulation of a simple subway line, which is experimentally validated.

Forward and Backward simulations of a power propulsion system

Abstract This paper aims to compare a forward and backward simulation of the power propulsion system of an automatic subway. In the forward approach the control of the system is required. In the backward approach, no control is required but a derivative relationship has to be computed. Both simulations are compared in terms of accuracy of dynamical performances, maximal values of different variables and energy consumption and specifically when limitations occur.

Different models of an energy storage subsystem for a hybrid locomotive

The aim of this paper is to determine an appropriate model of a hybrid diesel-electric locomotive in order to estimate its fuel consumption and test new energy managements. The locomotive is composed of a diesel-based generation subsystem, a battery - supercapacitors storage subsystem and a traction subsystem. A quasi-static model of the locomotive has been carried out from dynamical model. It allows the reduction of the computation time by 22 keeping an energy consumption accuracy of 99.4 %. Energetic Macroscopic Representation (EMR) is used as common description tool for the different models.

Reduced-Scale-Power Hardware-In-the-Loop Simulation of a Subway Line

Hardware-In-the-Loop (HIL) simulation of a simplified subway line is developed for experimental validation of subway line simulator. Energetic Macroscopic Representation (EMR) is used to organize models and controls. A subway supplied by a Traction Power Substation (TPS) through a DC energy rail is studied. The HIL simulation is based on the current control of an inductor, which reproduces the same behavior than the subway. A flexible and quasi-static model of the whole system is used and experimental results are provided.

Dynamic Model and Causal Description of a Traction Power Substation Based on 6-Pulse Diode Rectifier

The aim of this paper is to propose an Energetic Macroscopic Representation (EMR) of the dynamic model of a traction power substation based on 6- pulse diode rectifier. This model is validated by comparing the wave forms with PSIM169; software. Furthermore, it is applied to the energetic simulation of a subway line by combining the substation model with supply rail and vehicle models. This last part allows a good representation and comprehension of the real system.

Dynamical and static models of the traction system of an automatic subway

The aim of this paper is to compare different models of an automatic subway in order to determine the most appropriate of them for the evaluation of the energy consumption of different studied cases (normal mode and fault-modes). Several simplified models are then deduced from a reference dynamical model and are compared in term of accuracy and computation time. A quasi-static model with an equivalent single wheel is obtained and allows the reduction of the computation cycle by 708 compared to the dynamical model by keeping accuracy on the energy consumption of more than 99.3 % for a normal operating mode. By contrast, this model is not able to simulate correctly the system in fault-modes. This case requires a more complex model taking into account all the drives. Energetic Macroscopic Representation (EMR) is used to organize the different models.

Electrokinematical Simulation for Flexible Energetic Studies of Railway Systems

Simulation is a valuable tool to evaluate energy consumptions and design of railway systems. The system limitations have an important influence on the system behavior and must be taken into account in the simulation. Especially, the electromechanical limitations have a major impact on the kinematical behavior. However, such limitations are often neglected in classical studies. This paper deals with the development of an adaptive electrokinematical simulation to adapt the kinematical behavior of the system according to its limitations. A flexible simulation tool is thus obtained by taking into account electrical, mechanical, as well as kinematical limitations. This tool is validated by experimental results on a real railway track. It is then used to study different solutions to increase the transport capacity of a subway system, even when limitations occur.