Research On Self-healing Control Method Of Smart Distribution Network Based On Multi-agent Fault Tolerance

With the rapid economic and social progress,the survival of the earth is experiencing the environment and the serious challenges of resources,in order to meet these challenges,the world power industry chose smart grid.The smart grid is a comprehensive solution to the global energy,climate,environment and economy and sustainable development,and is the future direction of power grid research and development.Today,people on the power supply reliability and power quality requirements are getting higher and higher,and intelligent distribution network as an important part of the smart grid is to connect users and power grid link,related to thousands of households of power supply security,once Failure,will directly affect people's daily life and socio-economic development.In order to ensure the reliability of power supply and power quality,intelligent distribution network is required to have a complete self-healing capacity.At present,the focus of self-healing research on intelligent distribution network is mostly focused on the construction of self-healing framework of distribution network.For the self-healing method,the research on self-healing method is relatively small.Therefore,The research has important theoretical and practical significance.First,based on the research of self-healing control of intelligent distribution network at home and abroad,this paper analyzes the applicability of fault-tolerant thinking in self-healing control of intelligent distribution network,and improves the advantages of multi-agent system for complex system control efficiency.The traditional "2-3-6" self-healing control frame structure,adding redundant resources analysis and so on,put forward the "2-3-8" self-healing control frame structure based on multi-agent fault-tolerant,using intelligent distribution network Hardware redundancy resources and resolving redundant resources to ensure that the distribution network after the failure through the control of reconstruction is still according to the original target or slightly lower operation to ensure the safe and stable operation of intelligent distribution network.Then,based on the basic theory of graph theory,the redundant network model of intelligent distribution network is established.The analysis of the relationship between the operation of the equipment in the system and the relationship between the equipment in the intelligent distribution network is divided into three aspects: the function of the distribution network and the relationship between the devices in the dynamic operation Unit,redundant unit,path unit.The actual distribution network is divided into the current running in the transport network and the redundant resources available to the network of superposition,and the redundant resource network and the representation of the map,which is conducive to the use of computer processing.Finally,based on the establishment of the redundant resource network model,an intelligent distribution network fault tolerance method is proposed.The fault-tolerant method of hardware redundancy and redundancy in the distributed network resources ensures that the intelligent distribution network fails and the controller can be disturbed and stable when the load is lost.Through the control path and redundant resources,flexible conversion,so that effective fault isolation and redundant replacement,in order to achieve self-healing control,so that intelligent distribution network can be long-term stable operation in the normal state.The effectiveness of the method is verified by an example,and the self-healing speed is improved in the case of satisfying the constraint.The power supply can be restored after the fault.