Abstract: The goal of "carbon peaking and carbon neutralization" has accelerated China’s energy transformation and power grid upgrading.During the 14 th Five-Year Plan period,the characteristics of high proportion of new energy and multi-DC transmission in the power system have become more and more prominent,and the "double peak" characteristics of load have gradually emerged.The power grid is facing the challenges of power shortage and new energy obstruction in some periods.Therefore,in view of the growth of power installed capacity and load level and according to the power balance and new energy consumption of the provincial power transmission network,the full time series production simulation method is used to calculate and optimize the configuration capacity of energy storage device and demand-side response,so as to provide support for the provincial power transmission network planning during the 14 th Five-Year Plan period.