Abstract
Abstract The paper describes the application of supercapacitor energy storage system for induction traction drive test bench that replaces a real electric public transport for performing testing and researches. The suitability and usage of such bench for research purposes is explained and the importance of the development of software mathematical model for performing simulations to be done before physical implementation measures is reasoned. The working principle of the bench and applied components are described. A virtual model of the bench was built and simulations were performed using Matlab/Simulink software. The basic topology of the virtual bench model is described as well. The calculations of this work show the scaling of supercapacitor energy storage system by setting different limits of working voltage range in order to adjust them to test bench parameters, whereas the modelling compares two simulation cases – the application of less supercapacitors and the application of more supercapacitors with the same common rated voltage. The autonomous mode simulations were also performed. Simulation results are analyzed and recommendations for the application of the supercapacitor energy storage system, with respect to initial supercapacitor circuit voltage, are given.
Highlights
Non-regenerative units of electric public transport (EPT) like trams and trolleybuses are gradually being taken out of exploitation because modern EPT usually is equipped with electric drive system which is regenerative and is able to deliver the braking energy back to supply grid
If there is no other accelerating EPT the regenerated braking energy is transferred to the braking resistor and dissipated in heat which is economically disadvantageous from energy saving point of view
Simulations of induction traction drive test bench model imitating the movement of tramcar on level surface in different energy storage system (ESS) conditions is studied in this article
Summary
Non-regenerative units of electric public transport (EPT) like trams and trolleybuses are gradually being taken out of exploitation because modern EPT usually is equipped with electric drive system which is regenerative and is able to deliver the braking energy back to supply grid. This regenerated braking energy is used by other EPT that perform acceleration and are located in the same overhead grid section. If there is no other accelerating EPT the regenerated braking energy is transferred to the braking resistor and dissipated in heat which is economically disadvantageous from energy saving point of view. Energy storage elements can be mounted in power substations or installed on board of EPT
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