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电网技术  2014 

采用两阶段优化模型的电动汽车充电站内有序充电策略

DOI: 10.13335/j.1000-3673.pst.2014.04.022, PP. 967-973

Keywords: 电动汽车,两阶段优化,经济效益,峰谷差

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Abstract:

在满足电动汽车用户充电需求及配电变压器容量限制的前提下,建立了以充电站充电收益最大化为目标的第一阶段优化模型。考虑最大化电网公司对缩小峰谷差所给予的激励,以不低于第一阶段优化所求得的最大充电收益为约束,建立了第二阶段优化模型。根据用户的驾驶习惯,采用蒙特卡洛方法模拟用户的充电需求,对电动汽车在无序充电、第一阶段模型和两阶段模型优化控制充电3种情形下充电站的经济效益及配电变压器下的负载情况进行了仿真和分析。研究结果表明,采用第一阶段模型和两阶段模型均可显著提升充电站的经济效益。但是在现行的分时电价机制下,仅采用第一阶段优化模型进行大量电动汽车的充电控制往往会带来新的负荷尖峰,而两阶段优化模型在进一步增大充电站经济效益、减小峰谷差等方面均有显著作用,并且具有很高的计算效率,适于实际应用。

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