Abstract: The high proportion of new energy grid connections results in insufficient inertia of the system, which poses a serious challenge to the security and stability of the grid frequency. Virtual power plant(VPP) technology can realize the coordinated and optimized operation of different forms of electric energy by aggregating distributed energy resources(DERs), providing a new technical route for developing and utilizing the frequency modulation potential of distributed energy. An adaptive frequency modulation strategy for a virtual power plant considering fast frequency control is proposed. Firstly, according to different grid connection modes, the synchronous and asynchronous power sources in the virtual power plant are divided into two types: uncontrollable and controllable equipment and each type of equipment has different frequency-active control. Secondly, the adaptive weighting factor is introduced to decompose and aggregate the frequency-active control signal to obtain the desired control signal of the equipment. At the same time, a robust linear quadratic controller(LQR) based on linear parameter varying(LPV) is designed to match the control signal. Finally, the effectiveness of the proposed method is verified by the system simulation analysis of an example, and the results show that the proposed method can provide fast frequency support capability for the power system and realize the power complementation between DERs.