Estimating the Parameters of Electric Energy Storages for Traction Substations

Abstract

The article substantiates the relevance of using an electric energy storage in railway transport traction power supply systems for smoothing the traction substation load schedule taking the West Siberian railway as an example. The traction substation load schedule is analyzed with the consumed power values 30-min measurement intervals. The traction substation power consumption is estimated by a probabilistic method. The obtained analysis results were used to select the installed capacity of an electric energy storage for performing hourly load regulation and determine the traction substation average consumed power relative to which the load schedule will be smoothed. The hypothesis of the normal distribution of the traction substation load value is tested using application software packages for statistical data processing. The random variable typical distribution law most confidently reflecting the experimental data distribution pattern is determined. The energy storage’s selected power capacity and the traction substation average power consumption are used to perform a probabilistic assessment of the storage device exchange energy capacity. A procedure for selecting the storage device tentative exchange energy capacity is proposed.