Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (4): 1490-1495.doi: 10.13229/j.cnki.jdxbgxb20200367

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Real-time optimal power allocation inside electric-vehicle charging stations

Cong WANG1(),Yan MA1,Guo-guang WANG2   

  1. 1.College of Communication Engineering，Jilin University，Changchun 130022，China
    2.College of Physics，Jilin University，Changchun 130012，China
  • Received:2020-05-24 Online:2021-07-01 Published:2021-07-14

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Abstract:

In recent years, the number of electric vehicles has been drastically increasing. This situation gives rise to an urgent demand for designing a real-time optimal power allocation inside electric-vehicle charging stations. The goal of this paper is to present one possibility that addresses the aforementioned demand. First, the paper formulates the power-allocation problem as a linearly constrained non-linear optimization where the objective function is constructed via logarithm utility functions. Second, the paper mathematically shows that the optimal solution to the formulated power-allocation problem is user-friendly. Third, the paper presents an efficient algorithm that is able to obtain the optimal solution in real time. Finally, the paper validates the performance of the proposed power allocation through numerical simulations.

Key words: optimization and control, electric-vehicle charging station, real-time algorithm, optimization theory

CLC Number: 

  • TP13

Fig.1

Passive and active distribution networks"

Fig.2

Powers related to charging station"

Fig.3

Steps for computing the solution to OPT"

Fig.4

Illustration for computing OPT solution"

Table 1

Real-time performance evaluation"

小型充电站中型充电站大型充电站
小型车1.123.6214.58
中型车1.534.7920.28
大型车1.867.8325.53
小、中型车2.4514.47104.43
小、大型车2.7618.11191.37
中、大型车2.3816.64142.75
全部类型车2.4925.25310.08
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