Objective  The research on virtual power plants with multiple green energy sources is becoming a hotspot of smart grid research, but how to optimize the scheduling resources, ensure that resources to participate in the enthusiasm and sustainability,and achieving the subsidy system cost minimum, is a key problem for virtual power pricing mechanism.

  Methods  Based on user flexible load, electric vehicle, energy storage, distributed power supply, analysis of participation mode and participation cost,separately set cost model according to resource and business model differences; by measuring the actual participation marginal cost of different resources, with the method of similar to the spot market clearing, according to the system load demand, adjustable resource sorting, ultimately determine the subsidy price ceiling.

  Results  The pricing mechanism is used to realize the priority of users with low power economic value and great response potential from the economic point of view, to realize the reasonable distribution of power resources, to ensure that the cost of participating resources is subsidized and the system compensation cost is the smallest.

  Conclusion  Based on the actual calculation, it proves that the pricing mechanism and method of this paper are accurate and effective, and can provide support for the future subsidy policy of virtual power plants.