Probe into Main Transformer Capacity and Number of 110 kV Substation in Xi' an City

Combined with the twelfth five-year planning of Xi'an power grid,the paper analyzes the historical load data and saturated load density value of Xi'an power grid.In the light of different load density value of different regions in Xi'an city,this paper proposes a selection scheme for main transformer capacity,and defines the main transformer number and models,which can be used as reference for future planning of Xi' an power grid.