Synthetic Data Generator for Electric Vehicle Charging Sessions: Modeling and Evaluation Using Real-World Data

Manu Lahariya, Dries F. Benoit and Chris Develder
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Manu Lahariya: IDLab, Ghent University – Imec, Technologiepark Zwijnaarde 126, 9052 Ghent, Belgium
Dries F. Benoit: Center for Statistics, Ghent University, Tweekerkenstraat 2, 9000 Ghent, Belgium
Chris Develder: IDLab, Ghent University – Imec, Technologiepark Zwijnaarde 126, 9052 Ghent, Belgium

Energies, 2020, vol. 13, issue 16, 1-18

Abstract: Electric vehicle (EV) charging stations have become prominent in electricity grids in the past few years. Their increased penetration introduces both challenges and opportunities; they contribute to increased load, but also offer flexibility potential, e.g., in deferring the load in time. To analyze such scenarios, realistic EV data are required, which are hard to come by. Therefore, in this article we define a synthetic data generator (SDG) for EV charging sessions based on a large real-world dataset. Arrival times of EVs are modeled assuming that the inter-arrival times of EVs follow an exponential distribution. Connection time for EVs is dependent on the arrival time of EV, and can be described using a conditional probability distribution. This distribution is estimated using Gaussian mixture models, and departure times can calculated by sampling connection times for EV arrivals from this distribution. Our SDG is based on a novel method for the temporal modeling of EV sessions, and jointly models the arrival and departure times of EVs for a large number of charging stations. Our SDG was trained using real-world EV sessions, and used to generate synthetic samples of session data, which were statistically indistinguishable from the real-world data. We provide both (i) source code to train SDG models from new data, and (ii) trained models that reflect real-world datasets.

Keywords: smart grid; electric vehicle; synthetic data; exponential distribution; Poisson distribution; Gaussian mixture models; mathematical modeling; machine learning; simulation (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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