Design and Control of Modular Multilevel Converters for Battery Electric Vehicles
Design and Control of Modular Multilevel Converters for Battery Electric Vehicles
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DOI：
10.1109/tpel.2015.2408435
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发表时间：
2016
影响因子：
6.7
通讯作者：
M. Quraan;Tae-Jung Yeo;P. Tricoli
中科院分区：
文献类型：
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作者：
M. Quraan;Tae-Jung Yeo;P. Tricoli
新的先进电源转换系统在延长电池的续航里程和寿命方面发挥着至关重要的作用。本文提出了一种新的模块化多电平转换器与嵌入式电化学电池，实现了非常低的电池不平衡，而无需传统的平衡电路和输出电流的谐波含量可以忽略不计。在这种新的拓扑结构中，电池通过半桥转换器串联连接，从而为电池的放电和充电提供了高度灵活性。该转换器具有电池平衡控制功能，可在转换器的每个独立臂上操作，以均衡电池的充电状态。该文件表明，所提出的控制不影响三相电压输出的对称性，即使是显着不平衡的细胞。所提出的转换器的电池电动汽车的可行性和电池平衡控制的有效性证实了数值模拟和实验上千瓦级的原型。
New advanced power conversion systems play an essential role in the extension of range and life of batteries. This paper proposes a new modular multilevel converter with embedded electrochemical cells that achieves very low cell unbalancing without traditional balancing circuits and a negligible harmonic content of the output currents. In this new topology, the cells are connected in series by means of half-bridge converters, allowing high flexibility for the discharge and recharge of the battery. The converter features a cell balancing control that operates on each individual arm of the converter to equalize the state of charge of the cells. The paper shows that the proposed control does not affect the symmetry of the three-phase voltage output, even for significantly unbalanced cells. The viability of the proposed converter for battery electric vehicles and the effectiveness of the cell balancing control are confirmed by numerical simulations and experiments on a kilowatt-size prototype.