It is difficult to access to the grid planning because of intermittent, distance, mass, and other characteristics of wind power ,and significant impact on the construction, production operations, security and stability. In this paper, the nominal power plant is proposed to solve problems that large-scale wind farms grid in the existing real-time scheduling mode of power system. The equivalent of the wind turbine and the conventional water, thermal power and other energy storage devices of a region is achieved to control power grid.The feasibility is proved base on a virtual power plant data model and data validation using the actual network operation data of a million kilowatts of wind power .