Research on the Evaluation of the Construction Process and Investment Demand Calculation Technology for New Power Systems

Under the background of the new power system, there have been significant changes in the forms of the grid side, power source side, and load side. Clarifying the construction process and investment structure changes of the new power system from a development perspective is the key to discovering investment change patterns, guiding efficient investment of funds, and discovering and improving the investment efficiency of power grid infrastructure. This article first constructs a new power system evaluation index system and a new power system construction evaluation method from four dimensions: macro policies, power structure, grid structure, and terminal demand. Secondly, based on the higher demand for system regulation capability in the development stage of the power grid, as well as the urgent need to further improve power supply reliability, transaction flexibility, and diversity of power supply forms, an analysis of the investment direction of the power grid is conducted. Then, considering the changes in the demand for power grid investment functions, a power grid investment demand system that adapts to the new power system is constructed, including building a power grid investment demand calculation model based on project requirements at the project level, coordinating execution and planning, and considering factors such as load growth to construct a power grid investment demand calculation model that takes into account multiple factors. The power grid investment demand is calculated by combining bottom-up and top-down approaches. Finally, taking X province as an example, empirical calculations are conducted to verify the usability of the model.