Abstract: The natural endowments of wind and solar resources in the desert and Gobi Desert areas of our country, as well as the reverse distribution of energy and load, make it of great significance to develop large-scale new energy bases and large-scale transmission of AC/DC hybrid power grids in the desert and Gobi Desert areas. The frequent occurrence of extreme sandstorms in the desert and Gobi Desert areas has seriously affected the centralized development and long-distance safe and stable transmission of new energy power generation bases. This article first quantifies the impact of two disaster-causing factors of sandstorms on new energy bases, establishes a mathematical model that reflects the relationship between sandstorms and new energy output, strong winds, and line failure rates, uses Monte Carlo sampling combined with system information entropy to select typical fault scenarios and construct a recovery model, obtains the system elasticity curve based on operating conditions, considers the entire process of system disaster, and adopts the Analytic Hierarchy Process (AHP) method Establish elasticity evaluation indicators; Secondly, a flexible improvement method is proposed from a planning perspective, to minimize the equivalent annual investment cost of the line and energy storage and the system's loss of load cost. A joint planning model for line expansion and energy storage configuration for flexible improvement is established, which is transformed into a mixed integer linear programming (MILP) problem, and the expansion plan of the new energy baseline and the optimal configuration of energy storage are solved. Finally, taking the improved IEEE36 node system as an example for simulation analysis, the elasticity indicators before and after adopting improvement measures are compared to verify the effectiveness and accuracy of the proposed elasticity evaluation and improvement methods.