Optimal Dispatch Of Emergency Power Supply Vehicle In Multi Fault Repair Of Distribution Network

The rapid development of modern society is inseparable from the support of electric power.Once a major blackout occurs,especially multipoint accidents occur at the same time,many production departments will be paralyzed,which will affect the normal operation of the society.Therefore,when a major blackout occurs,it is very meaningful to establish an effective emergency repair strategy to maximize the usage of all kinds of available resources,save the power outage and minimize the time and area of power outage.First of all,this paper analysis the research status of the multi-fault repair,the isolated island division of the distribution network and the dispatch of the emergency power supply vehicle.On this basis,this paper first gives the concept of graph theory and its important component tree,and then research the basic principles and mathematical models of robust optimization algorithm and effective objective function.Finally,the development of the bacteria colony chemotaxis algorithm and the characteristics of the discrete bacteria colony chemotaxis algorithm for solving the discrete problem are introduced,which lays a theoretical foundation for the follow-up intensive study.Then,under the condition of considering the output of the distributed power supply,the strategy of isolated island division under the multiple fault repair of the distribution network is proposed.When studying the division plan of the island,the concept of the emergency degree of the load loss is first put forward from three aspects of life safety,economy and particularity,which overcomes the problem that the traditional load classification can not accurately describe the characteristics of the single load.Then the depth-first search algorithm is used to initially divided the island on the basis of simplified topology.Finally,from the following three aspects: the largest load recovery,the best economic and environmental protection,we should take the maximum load recovery rate,the lowest power generation cost and the minimum DG pollution output as the evaluation index,based on the entropy weight theory,the initial islanding division scheme is evaluated and analyzed,and the optimal islanding scheme is finally obtained.Finally,a robust economic dispatch model for dispatching emergency power vehicles in multi-fault repair of distribution networks is established.The uncertainty of the output of wind power and photovoltaic charging station and the particularity of the charging station was taken into consideration in the model establishment.The mathematical integration method was used to give the output curve of the charging station.Then,the objective function is to minimize the loss of total power outage and the shortest repairable time,and a robust economic dispatching model was established for the joint optimization of emergency power supply vehicles scheduling and fault repair sequence under multiple faults occurred in distribution network.The robust model was applied to the processing of the robust model.In the process of robust model,this paper introduce the concept of effective objective function.The discrete bacterial colony chemotaxis algorithm is used to find the optimal solution model.Finally,the optimal scheduling scheme of emergency power supply vehicle and the optimal repair order are obtained.