Quick charge optimal position selection method for electric automobile

Abstract

The invention provides a quick charge optimal position selection method for an electric automobile. The method comprises the following steps that: S1: independently constructing a target function which independently influences a travel distance and travel time when the electronic automobile travels in a road network, and a target function which influences a node failure probability and a node electricity utilization capacity when the electric automobile is charged in a distribution network; and S2: applying a multi-attribute decision-making node importance evaluation method to obtain the importance sequence of each charging node, and guiding the electric automobile to select the node with the low importance to carry out quick charging. By use of the method, the quick charge position of theelectric automobile is optimized, a coupling function of the road network and the distribution network is considered, and the selection of the quick charge position which considers the safety of a power grid and considers the benefits of a user is found according to the influence factor of the electric automobile under the road network and the distribution network through the multi-attribute decision-making node importance evaluation method.

Description

Technical field [0001] The invention relates to a method for selecting a fast charging position of an electric vehicle, in particular to a method for finding an optimal position for fast charging of an electric vehicle considering the safety of the power grid and the interests of users. Background technique [0002] With the development of electric vehicles, large-scale electric vehicle charging will have a huge impact on the grid. The disorderly charging behavior of large-scale electric vehicles can lead to negative results such as reduced power system safety, new load demand peaks, deterioration of power quality, and increased network loss. Electric vehicles charging at different locations have different risks to the grid, especially for fast charging of electric vehicles. It is particularly important to choose a suitable location for fast charging of electric vehicles. [0003] At present, there are many methods for selecting the charging location of electric vehicles connected...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that the fast charging of electric vehicles does not comprehensively consider the convenience of users, the safety risk of the power grid, and the coupling effect between the road network and the distribution network, the present invention provides a method for selecting the optimal location for fast charging of electric vehicles. Considering the complex network of road network and distribution network, choose the appropriate objective function, at each fast charging location, consider the travel distance and travel time of users under the road network, use the shortest path algorithm to get the ranking of travel distance and travel time, according to the power grid The node failure rate and node power consumption capacity are obtained from the historical data of components, and the four factors such as driving distance, travel time, node failure rate and node power capacity are assigned according to weights, and the node importance evaluation method of multi-attribute decision-making is used to obtain each node Ranking of the importance of electric vehicles to guide fast charging

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