Techno-Economic Design Methodology Of Hybrid Energy Systems Connected To Electrical Grid: An Application Of Hybrid Railway Power Substation

The railway operator would like to increase train frequency in order to satisfy demand for passenger flow growth in some lines. However the railway power substations (RPSs) are approaching their rating capacities, and have difficulty to supply more. A concept investigated by SNCF is a hybrid railway power substation (HRPS). Renewable energy systems and energy storages are integrated in the RPS to supply power. This paper presents the methodology based on simulation tools to design a HRPS by the electrical infrastructure railway engineering team. The first step uses a temporal power balance and economics linear formulation to optimize the HRPS global design and the energy management (for a time horizon of one year with time step of one hour). In the second step, the energetic macroscopic representation (EMR) is adopted to validate the HRPS global design with the corresponding control and the real time energy management system (time step of one second and simulation time of one week). The case study of Sarry railway power substation reveals that around 9% of the electricity bill can be reduced with the proposed hybridization. (C) 2018 International Association for Mathematics and Computers in Simulation (IMACS). Published by Elsevier B.V. All rights reserved.