CN111783359A - 考虑换电经济性与电网削峰填谷的电池调度优化方法 - Google Patents

考虑换电经济性与电网削峰填谷的电池调度优化方法 Download PDF

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CN111783359A
CN111783359A CN202010627940.9A CN202010627940A CN111783359A CN 111783359 A CN111783359 A CN 111783359A CN 202010627940 A CN202010627940 A CN 202010627940A CN 111783359 A CN111783359 A CN 111783359A
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祁东峰
李聪波
龙云
李永胜
黄明利
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Abstract

本发明公开了一种考虑换电经济性与电网削峰填谷的电池调度优化方法,包括以下内容:首先根据电动汽车参数预测出换电站各时段电池需求的数目,以预测出各时段电池的数目作为调配策略的数据基础进行调度,此电池调度方法主要有2部分:电池集中配送规则、电池有序充电策略。最后依据此调度建立电池投入与充电成本联合优化模型。

Description

考虑换电经济性与电网削峰填谷的电池调度优化方法
技术领域
本发明涉及电动汽车换电领域,具体涉及考虑换电经济性与电网削峰填谷的电池调度优化方法
背景技术
随着环境污染的日益严重,电动汽车代替燃油汽车将成为一种必然趋势。电动汽车数量越来越多,能源供应成为新能源电动汽车行业不断发展的关键一步。由于电动汽车换电模式具有充电时间短、用户购买电池成本低,便于电池的管理等特点受到社会的广泛关注。
此外,在换电模式下,研究电池投入成本与电池充电负荷对电动汽车发展具有重要意义。随着电动汽车数量越来越多,电池投入成本也随之增加并且大规模电池充电也将加剧电网峰谷差。而在电池调度过程中,同时考虑了电池投入与充电成本以及电池充电造成的峰谷差,可以有效减少电池投入与充电成本以及降低电池充电造成电网的峰谷差,加快电动汽车换电行业的发展。
发明内容
本发明提供一种考虑换电经济性与电网削峰填谷的电池调度优化方法,以降低换电模式下电池投入成本及减缓电池充电造成电网的峰谷差。
为实现本发明目的而采用的技术方案是这样的,即一种考虑换电经济性与电网削峰填谷的电池调度优化方法。它包括以下步骤:
步骤1:建立电动汽车电池各时段需求预测模型,统计各时段电动汽车需要更换电池的数目;
步骤2:制定考虑换电经济性与电网削峰填谷的电池调度策略;
步骤3:建立基于考虑换电经济性与电网削峰填谷的电池调度策略的电池投入与充电成本联合优化模型,并基于优化算法求解,包括但不限于进化算法。
2.优选的,步骤2中所述考虑换电经济性与电网削峰填谷的电池调度策略的过程为:
(1)电池集中配送规则
以步骤2中预测出各时段电池的数量为对象,除最后一次配送以外的配送次数的少部分电池采取均匀分配进行充换电;最后一次配送的大部分电池集中在0时刻充换电,具体每次配送的电池数量的计算见步骤3;
(2)电池有序充换电策略
物流车队从ti时刻开始配送电池数量Qi,经过Tdis/2到达换电站,以满足ti+1-ti时段产生的电池需求的数目并且将ti-1时刻配送的电池数量Qi-1在ti+Tdis/2时刻运回到充电站进行充电,充电周期为Tcharge
3.优选的,步骤3中所述基于考虑换电经济性与电网削峰填谷的电池调度策略的电池投入与充电成本联合优化模型,并基于遗传算法求解的过程为:
(1)电池投入与充电成本联合优化目标函数
Figure BDA0002567237480000021
式中:Bb为有序充电下电池初始投入量、Bq为有序充电下电池缺额补充投入量Bq、M为电池充电日成本、Cbattery为电动汽车电池的成本、Tbattery为电动汽车电池的使用周期;
电池初始投入量Bb为换电站开始投入电池的数量,计算见下公式:
Figure BDA0002567237480000031
电池缺额补充投入量Bq为充电完成的电池数目向下次配送时换电站需要补充的电池数目的缺额值,计算见下公式:
Figure BDA0002567237480000032
电池充电日成本M:引入分时电价,结合步骤2电池充换电策略,可以得到电池每天充电的成本,具体计算见下公式:
Figure BDA0002567237480000033
式中:Ndis为配送次数、Tdis为物流配送周期、Tcharge为电池充电周期、ti电池配送时刻、Qi电池每次配送的数量、λ(t)为分时电价、
Figure BDA0002567237480000034
为电动汽车每小时平均充电量;
(2)电池投入与充电成本联合优化约束条件
1)配送次数约束
电池配送次数下限为每天配送一次,上限为每天时段总和除以物流配送周期,具体如下公式:
1≤Ndis≤24/Tdis且Ndis∈{Z}
2)配送间隔约束
电池配送的间隔应大于等于物流配送周期,具体见如下公式:
ti+1-ti≥Tdis
3)电池补充累加值m约束
min(ti+m-ti)≥Tcharge+Tdis
4)电池集中配送规则约束
ti和Qi服从电池集中配送规则约束,具体见如下公式:
Figure BDA0002567237480000041
式中:η为最后一次配送电池集中系数
(3)电池投入与充电成本联合优化约束条件
电池投入与充电成本联合优化变量为配送次数Ndis,优化中间变量为ti
附图说明
图1电池调度优化方法的流程框架
图2优化算法流程
图3电池调度策略与等电池量配送、等间隔配送对比情况
具体实施方式
下面结合附图和实施例对本发明作进一步说明,但不应该理解为本发明上述主题范围仅限于下述实施例。在不脱离本发明上述技术思想的情况下,根据本领域普通技术知识和惯用手段,做出各种替换和变更,均应包括在本发明的保护范围内。
本案例以某换电运营网络点、某类型电动汽车1000辆为研究对象开展应用验证,流程框架和优化算法如下图所示。图1介绍了电池调度优化方法的流程框架;图2电池调度优化算法的求解流程。
表1换电参数
Figure BDA0002567237480000051
为了分析考虑换电经济性与电网削峰填谷的电池调度优化方法的优越性,现对电池调度流程框架进行验证,依据蒙特卡洛模拟分析得到预测结果。
表2各时段换电站需求电池的数量预测
Figure BDA0002567237480000052
表3电池调度优化结果
Figure BDA0002567237480000053
Figure BDA0002567237480000061
整个换电网络最少的电池投入量为486块,电池投入与电池充电成本为1075.84万元,具体配送表2所示。
本发明涉及的电池调度策略与等量配送、等时间间隔配送的区别如下表所示。
表4电池配送4次情况
(a)~(c)分别表示本文配送、等量配送以及等间隔配送原则
(a)
Figure BDA0002567237480000062
(b)
Figure BDA0002567237480000063
(c)
Figure BDA0002567237480000064
表4为电池配送4次下,具体的配送情况。根据本发明中的电池调度策略,在居民用电高峰期时,电池充电的成本及峰值数目如图3所示。

Claims (3)

1.一种考虑换电经济性与电网削峰填谷的电池调度优化方法,其特征在于,包括以下步骤:
步骤1:建立电动汽车电池各时段需求预测模型,统计各时段电动汽车需要更换电池的数目;
步骤2:制定考虑换电经济性与电网削峰填谷的电池调度策略;
步骤3:建立基于考虑换电经济性与电网削峰填谷的电池调度策略的电池投入与充电成本联合优化模型,并基于优化算法求解。
2.根据权利要求1所述的考虑换电经济性与电网削峰填谷的电池调度优化方法,其特征在于:步骤2中所述考虑换电经济性与电网削峰填谷的电池调度策略的过程为:
(1)电池集中配送规则
以步骤1中预测出各时段电池的数量为对象,除最后一次配送以外的配送次数的少部分电池采取均匀分配进行充换电;最后一次配送的大部分电池集中在0时刻充换电;
(2)电池有序充换电策略
物流车队从ti时刻开始配送电池数量Qi,经过Tdis/2到达换电站,以满足ti+1-ti时段产生的电池需求的数目并且将ti-1时刻配送的电池数量Qi-1在ti+Tdis/2时刻运回到充电站进行充电,充电周期为Tcharge
3.根据权利要求1所述的考虑换电经济性与电网削峰填谷的电池调度优化方法,其特征在于:步骤3中所述基于考虑换电经济性与电网削峰填谷的电池调度策略的电池投入与充电成本联合优化模型,并基于优化算法求解的过程为:
(1)电池投入与充电成本联合优化目标函数
Figure FDA0002567237470000021
式中:Bb为有序充电下电池初始投入量、Bq为有序充电下电池缺额补充投入量Bq、M为电池充电日成本、Cbattery为电动汽车电池的成本、Tbattery为电动汽车电池的使用周期;
电池初始投入量Bb为换电站开始投入电池的数量,计算见下公式:
Figure FDA0002567237470000022
电池缺额补充投入量Bq为充电完成的电池数目向下次配送时换电站需要补充的电池数目的缺额值,计算见下公式:
Figure FDA0002567237470000023
电池充电日成本M:引入分时电价,结合步骤2电池充换电策略,可以得到电池每天充电的成本,具体计算见下公式:
Figure FDA0002567237470000024
式中:Ndis为配送次数、Tdis为物流配送周期、Tcharge为电池充电周期、ti电池配送时刻、Qi电池每次配送的数量、λ(t)为分时电价、
Figure FDA0002567237470000025
为电动汽车每小时平均充电量;
(2)电池投入与充电成本联合优化约束条件
1)配送次数约束
电池配送次数的约束具体见下公式:
1≤Ndis≤24/Tdis且Ndis∈{Z}
2)配送间隔约束
电池配送的间隔与物流配送周期的关系,见如下公式:
ti+1-ti≥Tdis
3)电池补充累加值m约束
min(ti+m-ti)≥Tcharge+Tdis
4)电池集中配送规则约束
ti和Qi服从电池集中配送规则约束,见如下公式:
Figure FDA0002567237470000031
式中:η为最后一次配送电池集中系数
(3)电池投入与充电成本联合优化变量
电池投入与充电成本联合优化变量为配送次数Ndis,优化中间变量为ti
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CN113471559A (zh) * 2021-05-21 2021-10-01 蓝谷智慧(北京)能源科技有限公司 换电站及电池充电方法、控制装置、介质与设备
WO2023028882A1 (zh) * 2021-08-31 2023-03-09 宁德时代新能源科技股份有限公司 电能传输方法、装置、设备及介质

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