For energy storage bidirectional converters that use the Virtual Synchronous Generator (VSG) strategy for grid connected operation, there are problems such as slow active power response speed, dynamic oscillation, and overshoot when the active power command changes or the grid frequency is disturbed. Therefore, a second-order transient damping optimization strategy is proposed for the active power loop input difference added to the grid connected VSG strategy. This article first establishes a transient model of the traditional VSG strategy for energy storage inverters under grid connected conditions, and analyzes the mechanism of active oscillation through the zero pole distribution of the active closed-loop transfer function; Propose a second-order damping optimization strategy to quickly improve the transient active response characteristics of the existing transient stability problems; Finally, the effectiveness of the proposed transient damping strategy in accelerating active power response speed and suppressing dynamic oscillations and overshoot was verified through digital discretization simulation experiments.