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As one of the important sectors of the national economy, the power industry management department should constantly expand the scale of power system. Therefore, it faces increasingly heavy grid development planning task. Based on the research of the vacant area inference, existing classification and subarea method, this paper proposes an improved usage method of classification and subarea. As for existing areas with history load, existing and new areas with no history data, we use different load forecast ideas, which based on the concept of vacant area inference and the current situation of the basic data collection of domestic spatial load forecasting. Meanwhile, according to the classification ideology, taking " Distribution Network Planning and Design of the Technical Guidelines " as guidance, we can establish models in different voltage levels, the grid can be divided into high- voltage distribution network planning model and the medium voltage distribution network planning model. Finally, according to "Distribution Network Planning and Design of the Technical Guidelines", divide the power supply area and propose the grid partition plan model.

The Study of Power Grid Planning Based on the Model “One Point and Two Lines, Classification and Subarea”