On-Board and Wayside Energy Storage Devices Applications in Urban Transport Systems—Case Study Analysis for Power Applications

Abstract

This paper investigates the benefits of using the on-board energy storage devices (OESD) and wayside energy storage devices (WESD) in light rail transportation (metro and tram) systems. The analysed benefits are the use of OESD and WESD as a source of supply in an emergency metro scenario to safely evacuate the passengers blocked in a metro train between stations; the use of OESD for catenary free sections, the benefits of using the WESD as an energy source for electrical car charging points and tram traction power supply; the benefits of using a central communication system between trams, cars, WESD and electrical car charging points. The authors investigated the use of: OESD with batteries for a catenary free section for different scenarios (full route or a catenary free section between two stations); the charge of OESD between stations (in parallel with tram motoring) to decrease the charging dwell time at stations and to help in achieving the operational timetable; the thermal effect of the additional load on the overhead contact system (OCS) when the tram is charging between stations; the sizing of OESD and WESD for emergency feeding in a metro system. The authors investigated the use of the WESD as a source of energy for the electrical car charging points to reduce the car pollution and carbon emissions. Presented in the paper is the enhanced multi train simulator with WESD prepared for the analyses conducted. The paper describes the DC electrical solver and WESD control method. A validation of the software has been conducted in regard to the substation voltage, WESD energy balance and WESD control.

Review of Energy Storage Systems in Regenerative Braking Energy Recovery in DC Electrified Urban Railway Systems: Converter Topologies, Control Methods & Future Prospects

“…Due to this increase in weight, the vehicle's energy consumption also increases. For this reason, it is actually the best to make provision for an approximate onboard ESS space and sizing during the vehicle design rather than retrofitting an existing one , [157], [160], [161].…”

“…to aid the acceleration process as well as to maintain the line voltage threshold value. The installation of wayside is done either at a substation or at a trackside close to the train stations where the electric section experiences much fluctuations due to several braking and acceleration processes [160]- [162]. Advantages and Disadvantages: One of the advantages is, the wayside ESSs bring significant of cost savings due to power peaks shaving in the entire electrical network due to the vehicles' accelerations.…”

Simulator for Training Mining Locomotive Drivers

“…This is achieved due to the training in a virtual environment as close as possible to the real one (Alfieri et al, 2020; Grube et al, 2011). In recent decades, based on IT technologies, work environment simulators have been widely used in many areas of human activity, including in solving such important tasks as training, retraining and certification of specialists (Nikitenko and Shvets, 2020;Radu et al, 2020).…”

HIL Simulation of a Tram Regenerative Braking System

“…The basic components of the regenerative braking system are the energy storage system, a bidirectional converter connecting the energy storage system to the DC link of the main drive of the rail vehicle, and a control system with a built-in energy storage charging and discharging algorithm. In [1,2], an overview of technological solutions for regenerative braking energy storage and their implementation in practice are given. The energy storage usually consists of supercapacitors or lithium-ion batteries in the vehicle (on-board storage) or outside the vehicle (wayside storage).…”