Research On The Strategy Of Service Restoration Based On Game Theory For Active Distribution Network

The high permeability of distributed power access,the increase of controllable load,and the more flexible mode of operation,the traditional distribution network is faced with a lot of challenges,and the self-healing ability of which is severely tested.In order to meet the above challenges,the traditional distribution network has changed from the passive mode to the active mode,more decision makers are involved in service restoration.The game theory studies the behaviors of the decision makers with related interests or conflict decisions and the equilibrium problem of this kind of decision.The service restoration of distribution network and game theory both belong to a typical category of "multi-person decision".Therefore,the service restoration of active distribution network is expected to be solved by game theory.In this paper,the main work is as follows:Firstly,the characteristics and control modes of the active distribution network are analyzed.The knowledge of graph theory is used to simplify the distribution network,and the topology analysis method and the power flow calculation method based on breadth first search are introduced.Besides,the basic knowledge of game theory is introduced,which lays the foundation for solving the problem with game theory.Secondly,in order to speed up fault recovery in the distribution network,and consider the interests of all participants in the recovery process,a flexible layered restoration strategy of ADN based on game theory is proposed,and the related model is established,which includes a participant layer and a Nash equilibrium layer.According to different fault scenarios,related layers are invoked flexibly to make restoration schemes,which reduces the redundancy of restoration schemes and improves the speed of calculation.Finally,In order to satisfy the interests demand of power grid and users in ADN failure recovery and balance the interests between them,this paper applies game theory to resolve the problem based on MAS(Multi-agent system).A game strategy for service recovery of active distribution network based on multi-agent system is proposed.A MAS composed of the power grid agent,the user general agent and the coordination agent isdesigned,and an information transmission model of MAS is built.The power grid agent and the user general agent are performed by distributed parallel computing with improved ant colony algorithm and the statistical method respectively.This paper takes IEEE69 node model as an example to validation the effectiveness of the proposed strategy.