COMPARATIVE ANALYSIS OF APPROACHES TO DETERMINING THE PARAMETERS OF A CAPACITIVE ENERGY STORAGE FOR ELECTRIC ROLLING STOCK

The article deals with the main existing approaches to determining the parameters of on-board capacitive energy storages for electric rolling stock and their comparative analysis. The advantages and disadvantages of each of the ten considered approaches are set out. Each of the approaches is described and their comparative analysis is performed according to such criteria as the level of research complexity, the financial component of research, the possibility of taking into account the real operation conditions of electric rolling stock while carrying out the research, the method of evaluating the parameters of the on-board capacitive energy storage, the possibility of determining rational parameters, the universality of the approach, considering the technical and economic component and limitations on weight and size of indicators. The power and energy capacity of on-board capacitive energy storage devices, their weight-size indicators when applying each of the considered approaches for the same given operating conditions of the electric rolling stock are determined. A five-car articulated vehicle with an asynchronous traction drive and recovery systems, consisting of metro cars of models 81-7080, 81-7081, 81-7081-01, was chosen as the electric rolling stock. The experimental section between the final stations of the SviatoshynskBrovary line of the utility company “Kyivskyi Metropolitan” was chosen as the specified operating conditions. The payback period and the impact of storage systems with the selected parameters on the performance indicators of the given electric rolling stock while using various approaches are determined. It was found that the most developed approaches, the key point of which is the selection of rational parameters using theoretical research with the help of application-specific software and multi-criteria evaluation methods. The feasibility of using a multi-criteria approach, which allows choosing rational parameters of the capacitive energy storage for electric rolling stock based on three important evaluation criteria, i.e., weight, volume and payback period, is demonstrated. It was established that it is rational to use an on-board capacitive energy storage device of low power and energy intensity.