System design and control framework analysis of hybrid AC-DC microgrid
DOI：10.7667/PSPC171781
Key Words:hybrid AC-DC microgrid  demonstration project  system design  hierarchical control framework  coordination control strategy
Author NameAffiliation
FENG Yibin Electric Power Research Institute of State Grid Zhejiang Electric Power Company, Hangzhou 310014, China 
WANG Ke Electric Power Research Institute of State Grid Zhejiang Electric Power Company, Hangzhou 310014, China 
GE Xiaohui Electric Power Research Institute of State Grid Zhejiang Electric Power Company, Hangzhou 310014, China 
ZHANG Xuesong Electric Power Research Institute of State Grid Zhejiang Electric Power Company, Hangzhou 310014, China 
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Abstract:Microgrid provides a promising solution for large scale penetration of Distributed Generations (DGs) into the distribution network. Particularly, the hybrid AC-DC microgrid with the advantages of both AC and DC microgrids has become an important direction for the development of microgrid technology. Based on the demonstration project of 863 Program named Hybrid AC-DC Microgrid Shangyu Demonstration Substation, the main technical features of the demonstration hybrid microgrid are introduced, including topology design, key equipment and hierarchical control framework. The coordination control strategy is described in detail, including four operation modes and eight mode transition processes. The operation result shows that the demonstration project can significantly improve the reliability of power supply and accommodate high penetration of DGs, which is of certain guiding significance for the future development of hybrid AC-DC microgrid technology. This work is supported by National High-tech R & D Program of China (863 Program) (No. 2015AA050104).
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