Research On The Strategy Of Rush Repair And Recovery For Active Distribution Network

With various types of energy connected to the distribution network and load control technology more flexible,the scheduling and use of these resources has been restricted by the function and structure of the distribution network and the recovery model.Therefore,when the active distribution network occurs multiple faults,how to make full use of the load control technology and coordinate various distribution generations to put forward a set of fast and effective multi-fault repair and recovery strategy is significant.Based on the above problems,the main work of this paper has done as follows:Firstly,the graph theory is introduced,the breadth first search method and the depth first search method of the network topology search are summarized;due to the inconsistency of the working mode and operating characteristic of the feeder and the distribution generation,the feeder simplified method is introduced to optimize the two models in the same model;on this basis,the improved ant colony algorithm and the discrete chemotaxis of bacterial population method are analyzed,laying the foundation for the later study.Secondly,for the fast fault repair and power supply recovery from multi-fault in the distribution network with distribution generations,the strategy of repair and recovery optimization model with more layers and phases is proposed.In the emergency repair and recovery stage,the maximum load recovery value and the minimum comprehensive economic loss are respectively to the inner and outer optimization objective;in the repair and recovery network structure stage,the minimum network loss and the shortest repair time are respectively inner and outer optimization objective,to obtain the optimal repair and recovery strategy.Finally,for the fast recovery from multi-fault in the active distribution network,a dynamic repair-recovery model with more layers and scenes based on the multi-agent system is established,according to the hierarchical control technologies and "initiative" resources.When the active distribution network occurs multiple faults,the recovery strategy of each period stage will be obtained,by using the region's largest power supplycapacity index,maximum active adjustment capability index and maximum recovery capability index;on this basis,by defining the scene level weighting factor,the optimal repair strategy for the whole fault periods will be obtained by he discrete chemotaxis of bacterial population method with the objective of the minimum comprehensive economic loss;at the same time,when a new fault suddenly occurs in the process of fault repair and recovery,the strategy will be dynamically updated by the multi-agent system in order to complete the work as soon as possible.