A Hierarchical Control Structure for Distributed Energy Storage System in DC Micro-Grid

被引：28

作者：

Jiang, Wei ^{[1
]}

Yang, Chen ^{[1
]}

Liu, Zhong ^{[2
]}

Liang, Ming ^{[2
]}

Li, Peipei ^{[2
]}

Zhou, Guozheng ^{[2
]}

机构：

[1] Southeast Univ, Sch Elect Engn, Nanjing 210096, Jiangsu, Peoples R China

[2] State Grid Yangzhou Power Supply Co, Yangzhou 225000, Jiangsu, Peoples R China

来源：

IEEE ACCESS | 2019年 / 7卷

基金：

中国国家自然科学基金;

关键词：

DC micro-grid; distributed energy storage system; droop control; consensus control; SOC balancing; ADAPTIVE DROOP CONTROL; OF-CHARGE BALANCE; STATE; GENERATION; CONSENSUS; STRATEGY; UNITS;

D O I：

10.1109/ACCESS.2019.2939626

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

To adapt to the rapid development of the renewable generations, DC micro-grid has been becoming an attractive technical route. Energy storages are widely employed in DC micro-grid to balance the power generation and usage. Therefore, the coordination and energy control among these distributed energy storage systems are critical technical issues to guarantee the overall efficiency and security. In this paper, the concept and characteristic of the distributed energy storage system in DC micro-grid are first analyzed. A hierarchical control system for power sharing is proposed to achieve the state-of-charge (SOC) balancing among energy storage units (ESU). In the lower layer of the control system, the DC droop control is applied to allocate the output power of each ESU based on its maximum output power. In the upper layer, consensus algorithm is utilized to adjust the output power reference of each ESU to reduce the SOC difference. Finally, a Matlab/Simulink model is built to verify the proposed approaches. The simulation results indicate that the proposed method can achieve the SOC balancing robust operation in distributed energy storage system.

引用

页码：128787 / 128795

页数：9

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