Energy storage of electric railway batteries

Can energy storage devices be used in electrified railways?

This study presents the recent application of energy storage devices in electrified railways, especially batteries, flywheels, electric double layer capacitors and hybrid energy storage devices. The storage and reuse of regenerative braking energy is managed by energy storage devices depending on the purpose of each system.

Why are batteries used in railway systems?

Batteries are widely utilized in railway systems as uninterruptible power sources (UPSs). They provide backup power for various applications such as signalling, lighting, ventilation, and communication. This is due to their capacity for long storage duration.

What are batteries and fuel cells used for in railway systems?

Batteries and fuel cells are ESS devices that can be integrated into an HESS to meet the energy requirements in railway systems. The high-energy device can be used as an energy supplier to meet long-term energy needs, while the high-power device can be used as a power supplier to satisfy short-term high power demands.

What can battery ESS devices do in railway applications?

Battery ESS devices can serve as either an energy supplier or a power supplier due to their distinctive features in railway applications. Flywheels, EDLCs, batteries and SMESes are also candidates for forming an HESS.

How do energy storage systems help reduce railway energy consumption?

Energy storage systems help reduce railway energy consumption by utilising regenerative energy generatedfrom braking trains. With various energy storage technologies available, analysing their features is essential for finding the best applications.

Can batteries be used in electrified railway systems in Japan?

There are many applications of batteries installed both stationary and aboard in the electrified railway systems in Japan. Obviously, the advantages such as energy saving, voltage regulation and power compensation were presented by researchers who worked in the transportation bureau.