Abstract: The decrease in system inertia and the increase in risk factors for triggering cascading trips in the new power system makes the importance of preventing cascading trips increasingly prominent. Aiming at this problem, a method integrated with energy storage is proposed for suppressing cascading trips in power grid. By using the fast response characteristics of energy storage, the energy storage is put into operation to regulate the power flow in the early stage of power flow transfer, which can quickly suppress the temperature rise of the wires and gain time for the subsequent participation of hydrothermal power units and other slow-responding backup power sources in regulation. Based on dynamic maximum electrical betweenness of the network, risk scanning and demand calculation, the paper proposes a “three-step” allocation decision-making method for energy storage, including constructing a cascading tripping prevention and control plan that reflects network weaknesses and time-varying risks and solving the spatial and temporal selection problem of energy storage resources to suppress cascading tripping. Based on the dynamic thermal characteristics of transmission lines, a calculation method for energy storage power and capacity during the coordinated regulation of energy storage and hydrothermal power is proposed, and the scale of energy storage resources required to prevent cascading tripping is determined. The N-1 and N-2 fault calculation cases are provided for IEEE 30-bus network to verify the effectiveness of the proposed method.