Title
Charging cost optimization for EV buses using neural network based energy predictor
Author
Nageshrao, S.P.
Jacob, J.
Wilkins, S.
Publication year
2017
Abstract
For conventional buses, based on the decades of their operational knowledge, public transport companies are able to optimize their cost of operation. However, with recent trend in the usage of electric buses, cost optimal operation can become challenging. In this paper an offline optimal charging strategy is developed to minimize the energy cost. This is done by exploiting the periodicity and predictable operation of the city buses. For effective usage of the developed offline strategy, the actual energy demand of the electric bus must be known a-priori, which can be demanding. In order to address this issue, a predictor is designed. The neural network based predictor is able to estimate the energy demand for the next day. Using this, three different optimal charging strategies are implemented. Initially, only the operational constraints are considered to ensure the completion of a trip, later, a more involved problems consisting of battery state of charge (SoC) constraints and temperature constraints are included for the second and third optimization problems, respectively. All the three approaches result in significant energy cost minimization when compared to the non-optimal strategy of charging the electric bus to the full capacity at every available opportunity. Additionally, for the second and third formulations, namely, SoC and temperature constraints, by using a qualitative aging approach, some enhancements in the battery health is observed when compared to the non-optimal charging strategy.
Subject
2015 Fluid & Solid Mechanics
PT - Power Trains
TS - Technical Sciences
Traffic
Industrial Innovation
Electric vehicles
Machine learning
Neural nets
Optimization
To reference this document use:
http://resolver.tudelft.nl/uuid:eaa6d6f5-5ce5-4b61-9429-017e4ff1ff0f
DOI
https://doi.org/10.1016/j.ifacol.2017.08.1493
TNO identifier
781892
ISSN
2405-8963
Source
IFAC-PapersOnLine, 50 (1), 5947-5952
Document type
article