中国电气工程学报（英文） ›› 2018, Vol. 4 ›› Issue (2): 28-35.

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  • 出版日期:2018-06-25 发布日期:2019-10-31

An Optimal Charging/Discharging Strategy for Smart Electrical Car Parks

Tingting He*, Jianguo Zhu, Jianwei Zhang, Linfeng Zheng   

  1. School of Electrical and Data Engineering, University of Technology Sydney, Ultimo, NSW, Australia
  • Online:2018-06-25 Published:2019-10-31
  • Contact: * , Email: Tingting.He@student.uts.edu.au.
  • About author:Tingting He (S’14) received the B.S. and master’s degree from Beijing Jiaotong University, Beijing, China, in 2009 and 2015, respectively, both in electrical engineering. She is currently working toward the Ph.D degree in the School of Electrical and Data Engineering, the University of Technology Sydney, Sydney, N. S. W., Australia. Her research interest include power electronics, electric vehicles, and predictive control. Jianguo Zhu (S’93-M’96-SM’03) received the B.E. degree from Jiangsu Institute of Technology, China, in 1982, the M.E. degree from Shanghai University of Technology, China, in 1987, and the Ph.D. degree from the University of Technology, Sydney(UTS), N.S.W., Australia, in 1995, all in electrical engineering. He is currently Head of School for School of Electrical and Information Engineering at University of Sydney, Australia. His current research interests include electromagnetics, magnetic properties of materials, electrical machines and drives, power electronics, and green energy systems. Jianwei Zhang (S’15) was born in Bayannur, China. He received his bachelor degree in electrical engineering from the Northwest A&F University, Yangling, Shanxi, China, in 2014. Since then, he has been working towards his Ph.D. degree in electrical engineering at the University of Technology Sydney, Sydney, New South Wales, Australia. His research interests include control of power electronic converters, matrix converters, microgrids and AC motor drives. Linfeng Zheng (S’14) received the B.E. degree and the M.E. degree in electrical engineering from Beijing Jiaotong University, Beijing, China, in 2011 and 2014, respectively. He is currently pursuing the Ph.D. degree at University of Technology Sydney. His research interests include the development of battery and supercapacitor management and packaging techniques for electric vehicles and energy storage systems.

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Abstract: This paper presents a smart electrical car park model where the power flows among electrical vehicles(EVs) as well as between EVs and the main grid. Based on this model, an optimal charging/discharging scheme is proposed. The fluctuation of hourly electricity rates is considered in this strategy to select a proper charging/discharging rate for each EV with less expenditure during each charging period. The proposed smart electrical car park is able to buy or sell electricity in the form of active and/or reactive power, i.e. kWh and/or kVARh, from or to the main grid to improve the power quality. According to the current state of charge of the EV’s battery bank, customers and the grid demands, a control center makes the decisions and sends the instructions of specific charging/discharging mode to each charging station. The performance of the proposed charging/discharging algorithm is simulated in Matlab. A comparison between the proposed and the unregulated charging/discharging strategies has been implemented. The results demonstrate that the proposed scheme can achieve better economic profits for EV customers and increase the commercial benefits for the car park owner.

Key words: Smart car park, charging/discharging method, V2G