Research On Reliability And Terminal Layout Planning Of Distribution Network Based On Recursive Search

In recent years,with the continuous progress of China's social and economic development,the demand of rural users for the reliability of power supply in the distribution network is constantly improving.The large-scale use of distribution automation equipment,dual power supply of distribution network,modularization,decentralization and randomization of distributed clean energy,flexible load,electric vehicle charging system,energy storage device and other elements are the inevitable trend of future development.In view of this,this paper uses recursive search algorithm to search the distribution network frame as the main line,and studies the reliability evaluation of distribution terminals,the layout planning method of distribution terminals of dual power distribution system and the layout planning method of distribution terminals including micro grid distribution system,the contents are as follows:1.An improved algorithm considering the reliability of distribution terminals is proposed.The load point of the algorithm is used as the starting point to search the main circuit and sub circuit of the grid structure,judge the influence of components on the reliability of the evaluated load point in turn,record it,accumulate these times,and then calculate the reliability index of the load point and the whole system according to the formula.The validity of the model and algorithm is verified by an example.2.Based on the recursive search and analytic method,the terminal layout planning model of dual power distribution system is constructed,which is deeply integrated with genetic algorithm.Under the premise of only modifying the basic parameters of the network,the optimal scheme of terminal configuration for different distribution networks is obtained.The validity of the model and algorithm is verified by an example.3.A method of terminal planning and layout for distribution system with microgrid is proposed.Firstly,the active power model of distributed generation such as wind and solar energy storage is established,the search principle of reliability calculation method based on Monte Carlo simulation and recursive search is proposed,the economic model and objective function are established,and the improved genetic algorithm is used to optimize it,and the process of combining genetic algorithm,Monte Carlo simulation and recursive search is studied in detail.The validity of the model and algorithm is verified by an example.