A method for evaluating the discharge capacity of large-scale electric vehicles

Abstract

The invention relates to a discharge capacity evaluation analyzing method. The method comprises the steps of S1, acquiring use information of an electric automobile user using the electric automobile; S2, acquiring the battery charge state at the beginning of charging of the electric automobile user and the battery charge state at the end of charging; S3, calculating and drawing a probability distribution curve of the time that the electric automobile is connected to a power grid; S4, setting the displacing capacity of the electric automobile as the capacity which can be achieved for various power grid V2G technology by the electric automobile; S5, deriving the discharge capacity calculation formula of the electric automobile according to the conditions; S6, evaluating the discharge capacity of the electric automobile. With the adoption of the method, a discharge capacity model can be built; the capacity evaluation can be carried out according to the history or real-time data, which facilitates the strategy preparation of the automobile electrode joining in V2G operation; the peak load shifting can be achieved; the energy can be saved, and the emission can be reduced, and the renewable energy accepting capacity can be improved.

Description

technical field [0001] The invention belongs to the field of electric vehicle access to power grid (V2G) technology and energy storage technology, in particular to a method for evaluating the discharge capacity of large-scale electric vehicles. Background technique [0002] With the large-scale development of distributed renewable energy, the decentralized distribution, randomness, and intermittency of renewable energy have brought great challenges to the operation of the power grid, and the development of energy storage technology provides a feasible and effective solution to this problem. solution. At the same time, electric vehicles with dual attributes of load and power supply are being promoted and researched all over the world. When they are connected to the grid, the power battery of electric vehicles can be regarded as a kind of battery energy storage with decentralized random access. Different from energy storage systems with fixed configurations, electric vehicle ...

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Problems solved by technology

However, there are few studies on the discharge of electric vehicles at present, mainly because the technical difficulty of electric vehicle discharge is greater than that of charging, and it involves the participation of electric vehicle users. The dispatching capacity is unlimited, so the research on it is extremely important. This research content urgently needs an evaluation and calculation method for the dispatchable capacity of electric vehicles

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