Railway high voltage energy storage power supply

How to select energy storage media suitable for electrified railway power supply system?

In a word, the principles for selecting energy storage media suitable for electrified railway power supply system are as follows: (1) high energy density and high-power density; (2) High number of cycles and long service life; (3) High safety; (4) Fast response and no memory effect; (5) Light weight and small size.

What are electrical railway power supply systems?

Electrical railway power supply systems, ERPSS, are defined as the set of elements required to feed the trains with the necessary energy to ensure their proper operation. The type and configuration of these elements have changed significantly over time driven by the technological developments available at each moment.

Which traction power supply system is used in electrified railways?

The single-phase 25 kV AC power supply system is widely used in electrified railways . Since the traction power supply system (TPSS) adopts a special three-phase to single-phase structure, it will cause three-phase voltage unbalance problem on the power grid.

Can a new energy storage traction power supply system improve regenerative braking energy utilisation?

To solve the negative sequence (NS) problem and enhance the regenerative braking energy (RBE) utilisation in an electrified railway, a novel energy storage traction power supply system (ESTPSS) is proposed in this study.

Can energy storage systems be used in electrified railways?

Currently, as the key technology of smart grids and distributed generation, energy storage systems (ESSs) have attracted worldwide attention [24, 25]. The ESS can play a vital role in power demand-side management and load shifting. Moreover, the potential of an ESS in electrified railways has been widely discussed.

Why do we need ESS in traction power supply system?

With the continuous reduction of ESS costs these years, the large-scale installation rate of ESSs to electrified railway power supply systems is developing rapidly owing to its merits in improving system stability, reducing the operating costs of railway system. It is a key part of building a new traction power supply system .