This article provides an overview of modern technologies and implemented projects in the field of renewable energy systems for the electrification of railway transport. In the first part, the relevance of the use of renewable energy on the railways is discussed. Various types of power-generating systems in railway stations and platforms along the track, as well as in separate areas, are considered. The focus is on wind and solar energy conversion systems. The second part is devoted to the analysis of various types of energy storage devices used in projects for the electrification of railway transport since the energy storage system is one of the key elements in a hybrid renewable energy system. Systems with kinetic storage, electrochemical storage batteries, supercapacitors, hydrogen energy storage are considered. Particular attention is paid to technologies for accumulating and converting hydrogen into electrical energy, as well as hybrid systems that combine several types of storage devices with different ranges of charge/discharge rates. A comparative analysis of various hybrid electric power plant configurations, depending on the functions they perform in the electrification systems of railway transport, has been carried out.

Проведён анализ реализованных проектов систем накопления электроэнергии. Выполнен обзор актуальных областей применения накопителей энергии в энергосистемах разного типа, в том числе с возобновляемыми источниками и распределённой генерацией. Показано, что многие актуальные задачи выбора состава оборудования, организации структуры, ведения режимов, устойчивости и надёжности энергосистем с помощью накопителей энергии могут быть решены более эффективно, чем традиционными способами. Рассмотрен мировой и отечественный опыт применения различных технологий накопления электрической...

This paper deals with two transient states of the Russky Island power network, that can be recognized as a middle size Smart Grid, and which located at the end portion of the Russian South-East. In some cases, two transmission lines between the island and mainland grids can be emergency disconnected, and then a transmission line auto-reclosing might take place. The object of the paper is examination of possibility of using an energy storage unit in this Microgrid in order to improve condition for auto-reclosing. In addition, effectiveness of improving the Under Frequency Load Shedding implementation with the use of the energy storage emergency control, when the transmission line auto-reclosing has to be forbidden, is examined. These studies have been fulfilled with the use of the well-known MATLAB/Simulink software. The investigation results could be useful for forthcoming porting of this power network into the electricity grid of Vladivostok.

The paper proposes and describes a mathematical model of an energy storage system based on a battery energy storage system as part of an electric power system for calculating transient electromechanical processes. The reliability of the model is confirmed by full-scale experiments in an autonomous power system with an abruptly variable load. The model is intended for use in modern software systems to analyze the stability of power systems.