Electric vehicle group orderly charging method and distribution network power optimization method

Abstract

The invention provides an electric vehicle group orderly charging method and a distribution network power optimization method. The electric vehicle group orderly charging method divides the redundantpower between the active power upper limit value of the distribution network and the basic load of the residents into a plurality of charging grids equally based on the grid method, and realizes the orderly charging of the electric vehicle group based on the quick sorting method. The distribution network power optimization method using the orderly charging method has the advantages that the dailyload curves of residential basic load, single load of electric vehicle and orderly charging total load of charging vehicle are fitted, and then the optimal charging scheme is selected by calculating and comparing the total load variance of distribution network and the charging cost of users when the upper limit of active power of distribution network is different. The electric vehicle group orderly charging method of the invention realizes the orderly charging of the electric vehicle, avoids the overload of the distribution network, and provides an optimal charging scheme for reducing the lossof the distribution network and the charging cost of the user. The invention is applicable to the field of electric vehicles.

Description

technical field [0001] The invention belongs to the field of electric vehicles, and relates to the field of electric vehicle group charging, in particular to an orderly charging method for electric vehicle groups and a method for optimizing power consumption of a distribution network. Background technique [0002] In recent years, the rapid development of electric vehicles has largely solved the problems of environmental pollution and resource shortage brought by the traditional automobile industry, but it has also brought some new problems, mainly including two points: 1. In the planning of traditional distribution networks It is true that little consideration is given to the charging load of electric vehicles. Therefore, when large-scale electric vehicle loads are connected to the distribution network, it will cause serious peak overlap with the basic load of residents, which will bring huge losses to the distribution network in residential areas; The charging behavior of ...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the rapid development of electric vehicles has largely solved the problems of environmental pollution and resource shortage brought by the traditional automobile industry, but it has also brought some new problems, mainly including two points: 1. In the planning of traditional distribution networks It is true that little consideration is given to the charging load of electric vehicles. Therefore, when large-scale electric vehicle loads are connected to the distribution network, it will cause serious peak overlap with the basic load of residents, which will bring huge losses to the distribution network in residential areas; The charging behavior of electric vehicles is uncertain in time and space, so it is difficult to control

[0003] The current charging methods for electric vehicle groups include: 1. Disorderly charging of electric vehicle groups, that is, "plug and play". It brings higher charging costs to the user side; 2. According to the research on the spatio-temporal characteristics of the charging behavior of the electric vehicle group, the time-of-use electricity price is used to constrain the charging behavior of electric vehicles. This method has been widely promoted at present, but due to Most of the residents' daily routines and working hours overlap, so the charging time of electric vehicles will inevitably be concentrated in a certain period of time, which will cause the loss of distribution network

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