Consensus-Based Coordinated Control of Flexible Interconnected DC Microgrid Clusters

Dandan Qin, Chao Wang, Yuliang Liu, Rundong Wu, Dengshan Hou, Weijian Huang () and Liangliang Chen
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Dandan Qin: State Grid Anhui Electric Power Company, Hefei 230061, China
Chao Wang: State Grid Anhui Wuhu Power Supply Company, Wuhu 241027, China
Yuliang Liu: State Grid Anhui Wuhu Power Supply Company, Wuhu 241027, China
Rundong Wu: State Grid Anhui Electric Power Company, Hefei 230061, China
Dengshan Hou: State Grid Anhui Fuyang Power Supply Company, Fuyang 236000, China
Weijian Huang: College of Information Engineering, Nanchang Hangkong University, Nanchang 330063, China
Liangliang Chen: College of Information Engineering, Nanchang Hangkong University, Nanchang 330063, China

Energies, 2023, vol. 17, issue 1, 1-17

Abstract: This paper proposes a consensus–coordinated control strategy to improve the stability and reliability of interconnected direct current (DC) microgrid cluster systems based on isolated bidirectional DC–DC converters. Compared with the traditional communication-based control strategy, the proposed method does not require an additional communication system. The proposed method is only based on local measurement information, making the whole cluster form an organic unit. No matter where the power disturbance occurs in the continuous-flow microgrid, all the balance units in the system can be linked to provide emergency power support for the disturbed microgrid, improve the dynamic characteristics of the DC voltage of the disturbed microgrid, and reduce the steady-state deviation of the DC voltage of the disturbed grid. The disturbance power is reasonably borne by the balance unit of the whole system according to its equivalent power distribution coefficient ratio. Finally, the effectiveness of the proposed control strategy is verified through the PSCAD/EMTDC simulation.

Keywords: direct current (DC) microgrid cluster; isolated bidirectional DC–DC converter; coordinated control; local measurement (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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