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access icon free Energy efficiency strategies for railway application: alternative solutions applied to a real case study

© The Institution of Engineering and Technology
Received 24/07/2017, Accepted 03/11/2017, Revised 29/09/2017, Published 08/11/2017

This study focuses on the topic of energy efficiency for railway application. A case study extrapolated from a real system was approached. An entire railway infrastructure, constituted by an alternating current (AC) primary grid, a direct current (DC) railway system and some AC/DC railway electrical substations (ESSs), was observed. The considered system was represented to study the operation of the railway infrastructure in terms of energy. A method, based on an AC/DC power flow approach, was formulated to calculate the efficiency in the use of electrical energy, during the motion of a fleet of trains. The method reports the solution vector (i.e. the AC and DC voltages and currents) as a function of the scheduling of the railway service. The results of the numerical simulations focused on the energy amounts at the ESS. The discussion gives evidence to the impact of alternative operating solutions in terms of energy efficiency strategies.

Inspec keywords: numerical analysis; load flow; power grids; energy conservation; railway electrification; substations

Other keywords: AC-DC railway electrical substation; ESS; alternating current primary grid; electrical energy efficiency strategy; numerical simulations; scheduling; AC-DC power flow approach; DC railway system; AC primary grid; direct current railway system

Subjects: Rail transportation (energy utilisation); Substations; Transportation; Other numerical methods; Energy conservation; Numerical approximation and analysis

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