Transactions of China Electrotechnical Society  2017, Vol. 32 Issue (10): 145-153    DOI:
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Cooperative Secondary Control Strategy of Microgrids Based on Distributed Internal Model Design
Chen Meng, Xiao Xiangning
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China

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Abstract  This paper proposes a secondary voltage and frequency control strategy for the islanded microgrids based on the multi-agent system. Firstly, input-output linear mathematical model of voltage and frequency control is presented using state feedback. Then the preliminary knowledge of graph theory is briefly introduced, and distributed cooperative secondary controller is developed based on internal model design. The proposed control obviates the requirement for a central controller. In this scheme, each distributed generator controller requires only the local information and the information from its neighbors on a directed communication network. Finally an islanded microgrid test system is built in PSCAD/EMTDC to verify the effectiveness of the proposed control strategy. The results illustrate that the control strategy can restore both voltage and frequency to their reference values with accurate real power sharing.
Key wordsMicrogrids      multi-agent system      internal model design      secondary control      distributed cooperative control     
Received: 14 November 2016      Published: 26 May 2017
PACS: TM76  
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Chen Meng,Xiao Xiangning. Cooperative Secondary Control Strategy of Microgrids Based on Distributed Internal Model Design[J]. Transactions of China Electrotechnical Society, 2017, 32(10): 145-153.
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