Optimal design of the modular multilevel converter for an energy storage system based on split batteries
Optimal design of the modular multilevel converter for an energy storage system based on split batteries
复制标题
基于分体电池的储能系统模块化多电平变流器的优化设计
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
J. Biela
中科院分区：
文献类型：
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作者：
A. Hillers;J. Biela
提出了一种用于基于分裂电池的独立大功率储能系统（sBESS）的模块化多电平变换器（MMC）的优化设计。MMC允许sBESS直接连接到中压电网，而不需要线路变压器。一个自由的参数变化进行比较设计不同数量的模块和不同的功率半导体。发现许多市售IGBT对于5 MW、20 kV目标系统而言尺寸过大，并且使用优化的组件获得了更好的结果。当转换器设计为仅比绝对必要的模块多几个模块时，无源元件的总尺寸可以大幅减小，而功率损耗仅略有增加。一个有吸引力的候选系统，给出了一个更仔细的研究，其峰值功率转换效率为99.3%的预测（不包括在线路滤波器和直流-直流转换器接口电池的功率损耗）。
This paper presents the optimal design of a modular multilevel converter (MMC) for use in a standalone high power energy storage system based on split batteries (sBESS). The MMC allows for the sBESS to connect directly to the medium-voltage grid without the need for a line-transformer. A free parameter variation is performed to compare designs with different numbers of modules and different power semiconductors. Many commercially available IGBTs were found to be overdimensioned for the 5MW, 20kV target system, and better results were obtained with optimized assemblies. When the converter is designed with just a few more modules than absolutely necessary, the total size of the passive components can be reduced drastically, while the power losses increase only marginally. An attractive candidate system is given a closer look, for which a peak power-conversion efficiency of 99.3% is predicted (not including power losses in the line-filter and in the dc-dc converters to interface the batteries).