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Smart Charging of EVs in Residential Distribution Systems Using the Extended Iterative Method

Author

Listed:
  • Jian Zhang

    (School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China)

  • Mingjian Cui

    (Department of Mechanical Engineering, University of Texas at Dallas, Richardson, TX 75080, USA)

  • Hualiang Fang

    (School of Electrical Engineering, Wuhan University, Wuhan 430072, China)

  • Yigang He

    (School of Electrical Engineering and Automation, Hefei University of Technology, Hefei 230009, China)

Abstract

Smart charging of electrical vehicles (EVs) is critical to provide the secure and cost-effective operation for distribution systems. Three model objective functions which are minimization of total supplied power, energy costs and maximization of profits are formulated. The conventional household load is modeled as a ZIP load that consists of constant power, constant current and constant impedance components. The imbalance of distribution system, constraints on nodal voltages and thermal loadings of lines and transformers are all taken into account. Utilizing the radial operation structure of distribution system, an extended iterative method is proposed to greatly reduce the dimensions of optimization variables and thus improve calculation speed. Impacts of the conventional household load model on the simulation results are also investigated. Case studies on three distribution systems with 2, 14, and 141 buses are performed and analyzed. It is found that the linear constrained convex quadratic programming model is applicable at each iteration, when the conventional household load is composed of constant power and constant impedance load. However, it is not applicable when the conventional household load consists of constant current load. The accuracy and computational efficiency of the proposed method are also validated.

Suggested Citation

  • Jian Zhang & Mingjian Cui & Hualiang Fang & Yigang He, 2016. "Smart Charging of EVs in Residential Distribution Systems Using the Extended Iterative Method," Energies, MDPI, vol. 9(12), pages 1-21, November.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:12:p:985-:d:83684
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    Cited by:

    1. Yangwu Shen & Mingjian Cui & Qin Wang & Feifan Shen & Bin Zhang & Liqing Liang, 2017. "Comprehensive Reactive Power Support of DFIG Adapted to Different Depth of Voltage Sags," Energies, MDPI, vol. 10(6), pages 1-20, June.
    2. Dranev Yury & Maxim Babushkin, 2014. "Asymmetric exchange-rate exposure in BRIC countries," HSE Working papers WP BRP 27/FE/2014, National Research University Higher School of Economics.

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