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链式储能系统电池侧二次脉动功率的抑制方法

, PP. 231-237

Keywords: 链式变换器,电池储能系统,二次脉动功率,升降压变换器

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Abstract:

链式变换器的电路结构适合应用于电池储能领域,然而单相变换器的本质决定了电池组与电网能量交换时有二次脉动功率,这将危害电池组的寿命。为了抑制传统链式储能系统电池侧的二次脉动功率,在电池与链式变换器之间插入一级双向升降压变换器,构成双级链式变换器。本文对比分析了传统单级链式与双级链式变换器在电池侧的功率脉动情况,提出双级链式变换器的控制策略,通过控制中间直流电容的电压纹波缓冲电池侧的功率脉动。仿真和实验结果验证了理论分析的正确性。

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