级联h桥多电平变换器的电池组状态电荷平衡算法

L. Mathe, Paul Dan Burlacu, E. Schaltz, R. Teodorescu
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引用次数: 8

摘要

对于大多数多电平变换器(MC)应用来说,一个经常讨论的问题是保持子模块(SM)的储能元件之间的平衡。在电池组也是SM存储的一部分的应用中,例如statcom或电机驱动器,SM电压与整个电池的充电状态(SOC)不是线性关系;因此,平衡变得更加麻烦。本文提出了一种利用级联h桥平衡系统中电池组荷电状态的方法。该方法采用最近液位控制,然后根据电池组的SOC进行分类和选择。仿真结果表明,与移相PWM相比,该方法的开关次数大大减少。此外,实现平衡SOC所需的时间也减少了。通过实验和仿真验证了该方法的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Battery pack state of charge balancing algorithm for cascaded H-Bridge multilevel converters
For most of the Multilevel Converter (MC) applications a commonly discussed issue is the maintenance of balance between the energy storage elements from the SubModules (SM). In applications where a battery pack is also part of the SM storage, such as STATCOMs or motor drives, the SM voltage is not in linear relation with the State Of Charge (SOC) of the entire battery; thus, the balancing becomes more cumbersome. A method to balance the SOC of the battery packs in a system using cascaded H-Bridge is proposed in this paper. The method uses nearest level control followed by sorting and selection based on the SOC of the battery packs. Based on the simulation results the number of switching is reduced considerably compared to the method where the phase shifted PWM is used. In addition, the time needed to achieve the balanced SOC is also reduced. The proposed method has been verified through experiments and simulations.
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