Load demand profile for a large charging station of a fleet of all-electric plug-in buses

Abstract

This study proposes a general procedure to compute the load demand profile from a parking lot where a fleet of buses with electric propulsion mechanisms are charged. Such procedure is divided in three different stages, the first one models the daily energy utilisation of the batteries based on Monte Carlo simulations and route characteristics. The second one models the process in the charging station based on discrete event simulation of queues of buses served by a lot of available chargers. The third step computes the final demand profile in the parking lot because of the charging process based on the power consumption of batteries’ chargers and the utilisation of the available charges. The proposed procedure allows the computation of the number of required batteries’ chargers to be installed in a charging station placed at a parking lot in order to satisfy and ensure the operation of the fleet, the computation of the power demand profile and the peak load and the computation of the general characteristics of electrical infrastructure to supply the power to the station.

Keywords

• electric propulsion
• battery powered vehicles
• public transport
• battery chargers
• Monte Carlo methods
• discrete event simulation
• queueing theory
• power supplies to apparatus
• demand side management
• load demand profile computation
• charging station
• all-electric plug-in bus fleet
• parking lot
• electric propulsion mechanisms
• battery daily energy utilisation
• Monte Carlo simulation
• route characteristics
• discrete event simulation
• bus queue
• charging process
• power consumption
• battery charger power consumption
• electrical infrastructure
• power supply