CHENG Yiling,ZHANG Tengfei,WU Juai,et al.Optimal Coordinated Operation Control for Multi-microgrid Based on Bi-level Directed Graph[J].Automation of Electric Power Systems,2022,46(21):20-29.
CHENG Yiling,ZHANG Tengfei,WU Juai,et al.Optimal Coordinated Operation Control for Multi-microgrid Based on Bi-level Directed Graph[J].Automation of Electric Power Systems,2022,46(21):20-29. DOI: 10.7500/AEPS20220224002.
Optimal Coordinated Operation Control for Multi-microgrid Based on Bi-level Directed Graph
Coordinated operation for multi-microgrid is an important mode to improve the penetration of distributed generators. But how to bring the independent operation capability of sub-microgrid and the advantages of power support between sub-microgrids into full play simultaneously is a key problem
which urgently needs to be addressed. Based on the consistency theory
an optimal coordinated operation control architecture for multi-microgrid is proposed
which establishes the correspondence between the multi-microgrid system and the bi-level directed graph. Further
distributed control strategies can be designed according to the communication network represented by the bi-level directed graph. The lower-level control uses the consensus algorithm to adjust droop control parameters through information iteration
thus realizing the secondary control of the output voltage and frequency
and the proportional distribution of the power for distributed generators. The upper-level control adjusts the mutual power support among sub-microgrids
so that the multi-microgrid system can operate more reasonably under different conditions. Finally
a multi-microgrid simulation model containing four sub-microgrids is built for case analysis and the effectiveness of the proposed control strategies is verified.
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