With the acceleration of urban construction, the urban electricity load has increased rapidly, and electricity shortages have also appeared in various places. However, the rapid development of cities has resulted in a shortage of land. The location of substations and the selection of transmission lines are particularly important in planning. In this paper, distributed power transmission and transformation project to optimize network access with locating and sizing problems, establish an annual loss of power as the objective, and consider the output load timing characteristics of multi-period optimal power flow model. Use representative scenes to simulate the situation throughout the year, and give a method for determining scenes and their weights.

Taking "Power Transmission Project Management Information System" as an example, this paper introduces the application of Web GIS in power transmission project. The system comprehensively utilizes basic space data and related design results to provide a visual space collaborative management platform for owners, construction, construction, supervision and other related units, and intuitively displays accurate and complete project space locations, project progress, and related real-time data. Construction provides advanced auxiliary technical support, and transfers complete electronic archives of spatial location information for production operations. The "Power Transmission and Transformation Project Management Information System" has achieved good results in the field management of power transmission and transformation projects.