A Distributed Control Architecture for Cascaded H-Bridge Converter With Integrated Battery Energy Storage
A Distributed Control Architecture for Cascaded H-Bridge Converter With Integrated Battery Energy Storage
复制标题
一种集成电池储能的级联H桥逆变器分布式控制结构
DOI：
10.1109/tia.2020.3039430
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发表时间：
2020-11
影响因子：
4.4
通讯作者：
Bei Xu;H. Tu;Yuhua Du;Hui Yu;Hui Liang;S. Lukic
中科院分区：
文献类型：
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作者：
Bei Xu;H. Tu;Yuhua Du;Hui Yu;Hui Liang;S. Lukic
级联H桥拓扑由于其模块化结构而被用于电池储能系统的并网变换器中。为了充分利用转换器的模块化，本文提出了一种分层分布式控制架构，包括主控制，次级控制，和电池的充电状态（SOC）平衡控制。一级控制保证了电流的精确跟踪，而分布式二级控制的共识算法的基础上，提出了调节模块之间的功率分配，并证明了理论上是稳定的。为了提高电池储能系统的能量效率，进一步引入了分布式SOC平衡控制。最后，采用硬件控制器和软件平台实现了分层分布式控制策略。此外，载波移相控制也被实施，以实现多电平输出电压和谐波抑制。实验结果表明，所提出的控制方案的性能有效。
Cascaded H-bridge topology has been used in grid-tied converters for battery energy storage system due to its modular structure. To fully utilize the converter's modularity, this article proposes a hierarchical distributed control architecture that consists of primary control, secondary control, and battery state-of-charge (SOC) balancing control. Primary control ensures accurate current tracking, whereas a distributed secondary control based on consensus algorithm is presented to regulate power sharing among modules and is proved to be stable theoretically. A distributed SOC balancing control is further introduced to improve energy efficiency of battery energy storage system. Finally, the hierarchical distributed control strategy is implemented using hardware controllers and a software platform. Besides, a carrier phase shift control is also implemented to achieve multilevel output voltage and harmonic reduction. The experimental results demonstrate the performance of the proposed control scheme effectively.