The volume of regenerative energy of trams and trolleybuses

RELEVANCE. A significant potential for increasing the energy efficiency of urban electrified transport is contained in the possibility of re-useful use of part of the energy spent on traction of rolling stock, recovered during braking, for performing transport work. The economic justification of the available methods of utilization of recovered electricity depends on its volume as a whole and the excess component of it available under standard technical parameters and conditions of movement of rolling stock, dissipated on brake resistors in the form of heat into the atmosphere. Theoretical simulation computer-mathematical models for calculating recovered energy do not yet take into account all the key parameters of real processes in the electrical subsystem of mountain electric transport. THE PURPOSE of the study was to carry out instrumental measurement of energy flows for various groups of electric power–consuming equipment of the urban electrified transport, as well as regenerative energy – useful and redundant. METHODS. Field experiments, electrical calculations, comparative analysis. RESULTS. In the course of the study, instrumental measurements of energy consumption and recovery in the actual operation of trams and trolleybuses were carried out. In addition, comparisons were made with the results of other domestic and foreign measurements. CONCLUSIONS. Indicators of recovery energy volumes and their dependence on the type and characteristics of rolling stock and weather conditions are obtained. The limiting values of the share of total energy recovery from traction energy consumption are revealed: for trams – about half and for trolleybuses – up to a third.

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