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基于等效电路法的大容量蓄电池系统建模与仿真

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Keywords: 储能,可再生能源,大容量蓄电池系统,等效电路法,建模

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Abstract:

储能系统为可再生能源(如风电、光伏等)大规模接入电网提供了一种有效的方法。通过电池单体的串/并联可实现电池系统容量的扩大。该文针对由电池单体串并联组成的大容量蓄电池系统(largecapacitybatterysystem,LCBS),考虑到电池单体的参数非线性及容量不一致性等特点,结合串/并联电路工作特性,提出一种适宜于电气设计与仿真的LCBS等效电路建模方法,并在Matlab/Simulink中对串联、并联及串/并联型的锂离子LCBS进行了建模与仿真。通过仿真结果与实验数据的对比表明,在不同带载情况下,所提出LCBS模型能准确预测其放电工作特性,进而验证了所提出模型的准确性。

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