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Energies 2017, 10(4), 483; doi:10.3390/en10040483

Optimal Charging Schedule Planning and Economic Analysis for Electric Bus Charging Stations

Department of Electrical Engineering, Cheng Shiu University, Kaohsiung 83347, Taiwan
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Academic Editor: Joeri Van Mierlo
Received: 16 February 2017 / Revised: 20 March 2017 / Accepted: 30 March 2017 / Published: 5 April 2017
(This article belongs to the Special Issue Advances in Electric Vehicles and Plug-in Hybrid Vehicles 2017)
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Abstract

The battery capacity of electric buses (EB) used for public transportation is greater than that of electric cars, and the charging power is also several times greater than that used in electric cars; this can result in high energy consumption and negatively impact power distribution networks. This paper proposes a framework to determine the optimal contracted power capacity and charging schedule of an EB charging station in such a way that energy costs can be reduced. A mathematical model of controlled charging, which includes the capacity and energy charges of the station, was developed to minimize costs. The constraints of the model include the charging characteristics of an EB and the operational guidelines of the bus company. A practical EB charging station was used to verify the proposed model. The financial viability of this EB charging station is also studied in this paper. The economic analysis model for this charging station considers investment and operational costs, and the operational revenue. Sensitivity analyses with respect to some key parameters are also performed in this paper. Based on actual operational routes and EB charging schemes, test results indicate that the EB charging station investment is feasible, and the planning model proposed can be used to determine optimal station power capacity and minimize energy costs. View Full-Text
Keywords: contracted capacity; controlled charging; charging schedule; electric bus; economic analysis contracted capacity; controlled charging; charging schedule; electric bus; economic analysis
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Leou, R.-C.; Hung, J.-J. Optimal Charging Schedule Planning and Economic Analysis for Electric Bus Charging Stations. Energies 2017, 10, 483.

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