Method to Design Power and Energy Capacity of Onboard Energy Storage Device for Emergency Operation Based on Simple Formulation

Abstract

Recently, energy storage devices (ESDs) have been introduced to railway vehicles to operate even in an emergency case, such as a power outage. However, there have been no proposals for simultaneous design methods of power capacity and energy capacity of onboard ESD for emergency operation. In this paper, a model for the calculation of power and energy capacity of onboard ESD, which are utilized in an emergency case, is proposed. Furthermore, we propose a method to design the power and energy capacity of onboard ESD by considering the required power for traction and an auxiliary power supply system.