Investment Financing Modes and Economic Evaluation of Electric Vehicles Virtual Energy Storage Based on Cost-benefit Analysis

New energy vehicles not only have the characteristics of environment-friendly, energy saving and emission reduction, but also can participate in virtual energy storage as a power battery to bring certain economic benefits for electric vehicle owners. This paper studies the commercial operation mode of virtual energy storage for electric vehicles. Based on cost/benefit analysis theory, considering user responsiveness and peak valley electricity price differences, a mathematical model of virtual energy storage for electric vehicles led by the power grid is established. The virtual energy storage commercial operation modes for electric vehicles based on "Self-investment and self-operation" and "Self-investment and franchise" are proposed. The economic feasibility of the two operation modes is compared and analyzed using the net present value method. The feasibility of electric vehicles participating in virtual energy storage is verified through the simulation analysis of actual operating data from a domestic level-I charging station in China.