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The article considers the problem of assessing the impact of charging stations on the load schedules of transformer substations. The solution of the problem is based on the example of facilities undergoing trial operation in the automotive sector of railway transport. The parameters of the electric vehicle charging station and battery are used for a slow charging option based on an AC charging station and a battery with a rated voltage of 346 V and an energy consumption of 48 kWh. To assess the impact of the charging station operation, the results of the trial operation of an electric vehicle are considered. The assessment was performed for a number of load graph indicators. To consider and evaluate the dynamic processes observed during the operation of the charging station, a simulation model has been developed containing a controlled rectifier converter and a charge current limiter implemented using pulse width regulation. The charging station model has voltage and current level control, which are determined based on factory specifications. The results obtained can be used to evaluate the performance of transformer substation schedules when expanding the charging infrastructure, evaluate electricity quality indicators for various circuit solutions used to regulate charge voltage and current, develop demand management measures in electric vehicle charging processes, and develop recommendations for ensuring electricity quality indicators. The results of the work are an assessment of the effect of the charging station operation on the load schedule of the transformer substation, a simulation model of the charging station for testing control algorithms, battery charging protocols and circuit solutions for current rectification and inversion processes.

In article the algorithm of operation of the existing regime automatic equipment of transforming aggregates is considered. Earlier it was read that use of automatic equipment of switching on switch-off of reserve transforming aggregates is an effective remedy of lowering of losses in case of regulation of power of substation depending on tractive loading. Defining factors of assessment of efficiency of automatic equipment are the current and temporal settings, and also restriction of number of switchings in days. The analysis of diagrams of tractive loading showed that there is rather large number of temporal intervals where operation of automatic equipment is ineffective. On the one hand it is connected to the fact that loading is above a point of equality of losses in case of one and two transforming aggregates quite short time, and automatic equipment connects the reserve transforming aggregate already in the course of lowering of loading and disconnects it after a temporal setting. On the other hand - operating restriction of number of switchings of the reserve transforming aggregate in days doesn't allow to gain the considerable economic effect. The decision on use of regime automatic equipment with the existing settings can be the positive if at the same time the estimated effect in the form of abbreviation of losses of the electric power is above cumulative damage from switching of the reserve transforming aggregate. Regime automatic equipment in most cases, it is necessary to consider not as means of obtaining economic effect, and as means of reliability augmentation of operation of semiconductor rectifiers at the peak moments of loading what in turn influences reliability of electrical power supply of pull of trains in general.