Power Forecast of Overhead Catenary Islands in Battery Electric Train Operation: Case Study of Pfalznetz

Abstract

This paper explores the concept of overhead catenary islands (OCI) as a solution to extend the operating range of battery electric multiple units (BEMU) in regional passenger train services. Through strategic placement at terminal stations or along railway routes, OCI facilitate recharging of traction batteries during turnaround times. Using the Pfalznetz rail network in Germany as a case study, the paper employs simulation-based methods in conjunction with a vehicle energy model and an OCI power aggregator function to forecast power load profiles for OCI. The five OCI in Pfalznetz support a circulation plan of 30 vehicles. Results indicate power peaks during recharging between 2.6 MW and 6.7 MW and daily energy supplies of 3.8 MWh to 9.6 MWh, varying based on OCI locations. The study underscores the potential of OCI to facilitate battery-powered railway networks and the high stress the operation can put on local energy grids and therefore providing valuable insights for stakeholders involved in infrastructure planning and operation.