Research On Distributed Cooperative Control Of AC-DC Hybrid Microgrid

The new development concept of "innovation,coordination,green,opening and sharing" has a profound impact on the power industry.In recent years,the micro grid has developed rapidly,but the problems highlighted are also gradually increasing.With the scale of microgrid becoming larger and larger,the economy of microgrid system operation has been paid attention to.The traditional economic optimization control mode is mainly centralized.With the system becoming more and more complex,the centralized control is faced with problems such as insufficient capacity to deal with large-scale data,difficulty to realize advanced algorithms,etc.Distributed cooperative control can make the system run economically and optimally while ensuring the performance of the system.In this paper,the AC / DC hybrid microgrid system is taken as the research object.Based on the decentralized architecture of the microgrid of the multi-agent system,the distributed collaborative control method is studied.At the same time,the distributed collaborative control is realized at the level of human-computer interaction.The main research contents are as follows:(1)The development status of microgrid systems at home and abroad is discussed.The research status of microgrid distributed control is studied.The basic theories of microgrid decentralization based on multi-agent systems are introduced.(2)Propose a distributed cooperative control strategy and verify the theory and simulation.The performance of the algorithm is studied from the perspective of the algorithm's state transition matrix,the system's communication connection topology,and the algorithm's convergence coefficient.The optimal state transition matrix is obtained.And communication topology,the influence of convergence coefficient on the system.(3)Design and develop a microgrid data acquisition and monitoring system(SCADA),and propose a distributed SCADA system architecture,which implements basic functions such as system account login,password modification,data display and storage.(4)Set up an experimental platform to verify the microgrid distributed collaborative control and distributed SCADA system.The experimental results verify the effectiveness of the distributed cooperative control,and the system operating cost has been reduced by more than 14%.At the same time,the distributed SCADA system has also been verified to achieve its basic functions.Microgrid distributed collaborative control is a multi-participant collaborative control.In this paper,distributed collaborative control is studied at multiple levels,which effectively reduces the operating cost of the microgrid system,and provides a solution for the problems facing microgrids.It contributes a distributed collaborative strategy for microgrid economic optimization and enriches a distributed architecture for human-computer interaction system of microgrid.