Multiple renewable energy station short-circuit ratio (MRSCR) is a crucial indicator in assessing the resi-lience of power systems.Grid-forming energy storage plays a significant role in enhancing this ratio.The paper begins by outlining the fundamental structure of grid-forming energy storage and then analyzes the interrelation between the power and frequency voltage.Through theoretical deductions coupled with simulation studies

the grid-forming energy storage is demonstrated to possess the characteristics of a virtual synchronous generator

analogous to the traditional power sources providing short-circuit capacity to the AC system.Then

based on an equivalent impedance matrix

the underlying mechanism of how the grid-forming energy storage impacts the MRSCR is revealed.Finally

a case study is presented to validate the positive effect of grid-forming energy storage on enhancing MRSCR.