Proposal of Priority Schemes for Controlling Electric Vehicle Charging and Discharging in a Workplace Power System with High Penetration of Photovoltaic Systems

Helindu Cumaratunga, Masaki Imanaka, Muneaki Kurimoto, Shigeyuki Sugimoto and Takeyoshi Kato
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Helindu Cumaratunga: Department of Electrical Engineering, Nagoya University, Nagoya 464-8603, Japan
Masaki Imanaka: Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
Muneaki Kurimoto: Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
Shigeyuki Sugimoto: Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
Takeyoshi Kato: Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan

Energies, 2021, vol. 14, issue 22, 1-23

Abstract: Using Electric Vehicles (EV) as Flexible Resources (FR) to increase surplus Photovoltaic (PV) power utilisation is a well-researched topic. Our previous study showed that EVs are viable as supplementary FRs in large capacity PV power systems, where EVs are likely to gather (i.e., workplaces). However, that study assumed all EVs to have identical arrival and departure times (availability), and battery capacities. As these characteristics may vary between EVs and affect their performance as FRs, this study expands the modelling of EVs to consider a variety of availabilities and battery capacities. To effectively utilise a variety of EVs as FRs, an Optimisation Electric-load Dispatching model is used to formulate priority schemes for charging and discharging the EVs based on their potential to contribute to the power system. The priority schemes are evaluated by simulating the annual operation of the power system both with and without the priority schemes, and comparing results. The power system is simulated using a Unit-Scheduling and Time-series Electric-load Dispatching model. The priority schemes reduced annual CO 2 emissions by nearly 1%, compared to the case without the priority schemes. The performances of different EVs as FRs when the priority schemes are used and not used are also analysed.

Keywords: electric vehicles; flexible resources; priority schemes; charging and discharging; photovoltaic power generation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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