Distributed power supply equivalence method based on electric vehicle discharge behaviors

Abstract

The invention discloses a distributed power supply equivalent method based on electric vehicle discharge behaviors, which comprises the following steps: simulating and analyzing the travel behaviors of an electric vehicle within one day, and determining the location of each moment; determining a charging and discharging rule of the electric vehicle, and determining a charging and discharging stateof the electric vehicle at each moment in one day in combination with the travel behavior of the electric vehicle; and respectively counting the electric vehicle sets discharged at each moment of each ground point, enabling the electric vehicle sets to be equivalent to a distributed power supply with changed output at each ground point, and enabling the output power of the equivalent distributedpower supply at each moment to be the total electric vehicle discharge power of the ground point where the equivalent distributed power supply is located. Based on the travel behavior of the electricvehicle, the discharge behavior of the electric vehicle is equivalent in the form of a distributed power supply, and the discreteness and randomness of the electric vehicle can be well reflected. Theequivalent distributed power supply has the characteristic of flexible switching, can provide power support for work such as high-load area power supply and system net rack reconstruction, and has a wide application prospect.

Description

technical field [0001] This patent relates to the technical field of grid-connected electric vehicles, and specifically relates to an equivalent method for distributed power sources based on the discharge behavior of electric vehicles. Background technique [0002] The energy crisis and environmental pollution are becoming more and more serious, and the promotion of electric vehicles can effectively alleviate this crisis. With the continuous support of national policies for electric vehicles, the number of electric vehicles in the distribution network has increased year after year. In the charging mode, the electric vehicle can be regarded as a load connected to the distribution network. In the discharging mode, it can discharge to the urban distribution network system in a centralized manner with the help of the charging piles placed in the parking lots in various areas of the city. The overall access capacity of electric vehicles with centralized discharge is large, which...

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Problems solved by technology

The above studies all have the same disadvantages, that is, there is no qualitative and quantitative research on the impact of electric vehicle discharge on the protection and control of urban power grids, and the discreteness and randomness of electric vehicles are insufficiently reflected, so it cannot be applied to the grid with a large number of electric vehicles. Power system analysis work such as distribution network power flow analysis and fault characteristic analysis

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