考虑配置储能系统的电动公交充电站充放电调度策略

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  • 1. 南京大学工程管理学院, 江苏南京 210093
徐薇, E-mail: xuwei@nju.edu.cn

收稿日期: 2022-06-29

  网络出版日期: 2023-06-13

基金资助

国家自然科学基金(72171114);国家自然科学基金(71671087)

Charging and discharging scheduling for electric bus charging station with energy storage system

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  • 1. School of Management and Engineering, Nanjing University, Nangjing 210093, Jiangsu, China

Received date: 2022-06-29

  Online published: 2023-06-13

摘要

针对电动公交充电站无序充电情况下造成的电网负荷压力大、充电运营成本高等管理难点,提出了一种考虑配置储能系统的电动公交充电站充放电调度策略。首先,以充电站每日充放电总成本最小为目标,建立了混合整数规划充放电调度模型,对电动公交的充电行为以及储能设备的充放电行为进行协同调度,并对储能设备的容量规划进行优化决策和敏感性分析。其次,在进行充电调度时充分考虑车载锂电池的非线性充电特性,采用分段线性函数近似方法描述电池荷电状态(State of Charge,SOC)的变化曲线。最后,基于成都市某电动公交充电站的历史行程和充电数据进行模型验证和案例数值分析。结果表明,所提出的储能设备配置方案和相应的充放电调度策略可以有效降低充电站运营总成本,缓解电网负荷压力,减缓电池寿命衰减,从而提高电动公交充电管理经济性和电网稳定性。

本文引用格式

徐薇, 黄悦丰, 陈彩华 . 考虑配置储能系统的电动公交充电站充放电调度策略[J]. 运筹学学报, 2023 , 27(2) : 95 -109 . DOI: 10.15960/j.cnki.issn.1007-6093.2023.02.006

Abstract

A charging and discharging scheduling strategy for electric bus charging station considering the configuration of energy storage system is proposed to address the management difficulties of high load pressure and high charging operation cost caused by disorderly charging at electric bus charging station. Firstly, a mixed integer programming model is established to minimize the overall daily cost of the charging station and to coordinate the charging of the electric bus and the charging and discharging of the energy storage system. The capacity of energy storage system is optimized and sensitivity analysis is performed. Secondly, the nonlinear charging characteristic of the onboard lithium battery is fully considered and the piecewise linear approximation method is used to describe the charging profile of battery SOC. Finally, model verification and case study are made based on the historical travel and charging records of an electric bus charging station in Chengdu. The findings demonstrate that the suggested charging scheduling strategy can successfully lower the overall cost of the charging station, ease load pressure of the grid, prolong the life of the lithium battery and enhance the economy of bus charging management and power grid stability.

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