Research On Grid-based Distribution Network Planning And Its Application In Yulin High-tech Zone

With the rapid economic development,users are increasingly dependent on electricity,and higher requirements are placed on the reliability of power supply.Distribution network planning is an important guide and basis for the construction of the distribution network.The level of its self-healing control ability directly affects the power supply quality of the power grid to users.Studies have shown that more than 80%of the faults in the power system are caused by the distribution system.The current overall structure of the urban distribution network in my country is weak and urgently needed.Optimizing the grid structure,building a segmented connection configuration that meets the requirements for self-healing control,etc Therefore,strengthening the planning and design of the smart distribution network and improving the grid structure are of great significance to the development of the cityTaking the distribution network planning of Yulin High-tech Zone as an example,this paper introduces in detail the research methods,procedures,planning principles and spatial load forecasting methods based on "gridization" of the distribution network planning,as well as the final achieved target network architecture and effects.First,according to the principle of "griding" the distribution network,combined with the basic conditions of Yulin High-tech Zone’s economic development and urban planning and construction,the urban area is divided into the grid of the distribution network and the division of power supply units.Secondly,analyze the current status of the high and medium voltage distribution network in the grid of the high-tech zone,analyze various indicators,and summarize the problems of the grid.At the same time,based on the development status of the high-tech zone,urban development goals,land use planning,industrial layout,etc.,the space load forecasting method is used to carry out long-term load forecasting for each grid unit.It also proposes the distribution network planning goals of the high-tech zone,and proposes a grid optimization plan based on the target value of each grid index.Each block of the city forms a grid "microgrid",and each grid microgrid The grid is planned in detail,and strives to achieve reasonable distribution,strong grid,simple wiring,advanced equipment,and flexible power supply.By constructing a reasonable grid structure and realizing the level of distribution network automation,the power supply reliability and power supply capacity of the power grid will be further improved Finally,the effect analysis of the "grid"-based high-tech zone target planning grid is carried out,and the evaluation indicators of the two grids are analyzed,and both of them have reached the predetermined goals.Finally,the distribution network of the jurisdiction will gradually become a unified and strong intelligent distribution network.Power grid...