For the system with virtual synchronous generator (VSG) as the control method, the output active power and frequency of the conventional VSG are greatly affected when the power command changes abruptly or the grid frequency fluctuates. The existing methods improve the transient characteristics of the power response of the conventional VSG while retaining the frequency support characteristics and power non-differential following characteristics of the conventional VSG, which enhances the frequency stability of the system. However, they deteriorate the output transient characteristics of the active power during grid frequency disturbances. This paper analyzes the physical nature of the deterioration of the transient characteristics of the conventional VSG, and then proposes the method of introducing a phase compensation link in the forward channel of the VSG control loop, which increases the phase margin of the system from 17° to 76.6° and effectively resists the grid frequency disturbance. Finally, the experiment result verifies that this method has a better ability to resist the grid frequency disturbance compared with the traditional VSG control scheme.