Abstract: This paper establishes the index of transmission network structure selection, which covers the large-scale clean energy consumption, the comprehensive risk and the total cost of the power network, and presents the selection process and the results of 500 kV HG station network structure selection in the city center. The results show that the evaluation method and index can adapt to all kinds of constraints, and the input parameters can be easily obtained. This index considers both normal operation and serious failure, and also economy, which can effectively cover the main issues of concern to decision-makers.

Key words: transmission network, 500 kV terminal substation, comparison and selection of grid structures, load reduction, power grid risk value, clean energy consumption