A Data-driven Harmonic Modeling Method for Electric Vehicle Charging Stations

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Paper number
1409
Working Group Number
Conference name
CIRED 2019
Conference date
3-6 June 2019
Conference location
Madrid, Spain
Peer-reviewed
Yes
Short title
Convener
Authors
Liu, Yiming, Huazhong University of Science and Technology, China
Li, Yan, Huazhong University of Science and Technology, China
Ren, Jiaxin, Huazhong University of Science and Technology, China
Wang, Shaorong, Huazhong University of Science and Technology, China
Li, Li, University of Technology Sydney, Australia
Abstract
Electric vehicle (EV) chargers are non-linear loads mainly composed of power electronic devices, which will produce harmonics when connected to distribution networks on a large scale, endangering the safe and stable operation of the power grid and power equipment. When high-power charging stations are connected to the distribution network, the mechanism modeling methods are usually too complex. This paper proposes a data-driven harmonic modeling method for EV charging stations. Firstly, the actual measured data is obtained by the charging monitoring system to analyze the harmonic characteristics of current and voltage in the dynamic process of charging. Then, the overall equivalent modeling strategy is adopted for EV charging stations. The relationship between the amplitude and phase angle of each harmonic current and the fundamental voltage, the state of charge (SOC) of the battery and the type of rectifier circuit is non-linearly mapped by the radial basis function network (RBFN). In order to validate the effectiveness of this modeling method, a battery-SOC-based charging station model of EV is built to simulate the output characteristics of the charging station in a complete charging cycle, and RBFN modeling is conducted with the acquired data. The results show that the method can well reflect the harmonic external characteristics of the parallel points of the charging station, and has the advantages of fast simulation speed and high precision. It is an effective harmonic source modeling method, which can be applied to the harmonic estimation of large-scale grid connection of EV charging stations and power quality management.
Table of content
Keywords
Publisher
AIM
Date
2019-06-03
Permanent link to this record
https://cired-repository.org/handle/20.500.12455/403
http://dx.doi.org/10.34890/633
ISSN
2032-9644
ISBN
978-2-9602415-0-1