In order to avoid the inaccurate listing of substation secondary cable quantity under the two-dimensional design mode

which cannot meet the requirements of current precise investment

the paper proposes to use BRCM three-dimensional software modeling to realize automatic laying of substation secondary cable according to the optimized path. Firstly

the process of cable laying design by BRCM software is introduced in detail. Secondly

taking a certain 110 kV substation as an example

the three-dimensional model of substation cable trench

cable bracket and electrical equipment is established. The cable laying principle is set

and the cable list with optimized path can be exported with one click. Finally

the estimated cable consumption of two-dimensional design and the actual cable consumption of three-dimensional simulation optimized path are compared and analyzed. The data show that

with the application of BRCM software

the investment is reduced by 10.8% compared with the total amount of two-dimensional design cable

and the result of precise investment is achieved. The error between BRCM software and the actual cable laying amount is less than 5%

which meets the requirements of engineering specifications.It shows the feasibility and reliability of the path optimization of BRCM 3 D modeling.