随机环境下电动汽车充电实时管理与优化控制算法

Management and Optimal Control Algorithm for Electric Vehicle Charging in Random Environment

电动汽车的规模日益壮大,对其充电行为进行自适应管理成为亟待解决的问题.从充电服务商的角度出发,协同可再生能源和储能设备,并计及电网的时变电价和电动汽车充电可容忍时延,基于Lyapunov优化理论提出随机环境下的电动汽车充电实时管理和优化控制算法,旨在最大化充电服务商的利益,即最小化购电成本.理论性能分析证明,所提算法无需可再生能源出力、充电需求和时变电价的先验统计信息,就能使优化目标趋近最优值.仿真结果表明,该算法可以有效减少充电服务商的购电成本,相比于基准贪婪算法可降低27.3%.

With the increasing scale of electric vehicles(EVs),the adaptive management of its charging behavior becomes an urgent problem to be solved.From the point of view of charging service provider,an online management algorithm for EV charging is proposed based on the Lyapunov optimization theory under the random environment in this paper,considering renewable sources energy,storage equipment,time-varying electricity price,and the tolerable delay of EV,with an aim of maximizing the benefits of charging service providers(i.e.,minimizing the cost of electricity purchased).The performance of the proposed algorithm is analyzed to verify that it can achieve near-optimal optimization results without any a priori statistical information about the system inputs(renewable energy generation,charging demand,and time-varying electricity price).The simulation results show that the proposed algorithm can effectively reduce the economic cost by 27.3%compared with the benchmark algorithm.