Optimal dispatching method of large-scale electric-vehicle access in power grid

Abstract

The invention relates to an optimal dispatching method of large-scale electric-vehicle access in a power grid. The optimal dispatching method includes dividing a dispatching time range into a plurality of time frames according to time slots; for each electric vehicle, charging in an ongoing constant power manner; creating the optimization problems related to the charging time according to the required time for charging each electric vehicle and the time separating from the power grid; solving the optimization problems according to the priority sequence of the electric vehicles accessing into the power grid, and acquiring the start time for charging each vehicle; when many vehicles access into the power grid at the same time, sequencing and sequentially solving the optimization problems to obtain the final dispatching strategy. Compared with an existing method, the optimal dispatching method has the advantages of low calculating quantity and high instantaneity and the like.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and relates to an optimal scheduling method for connecting large-scale electric vehicles in a power grid. Background technique [0002] As a new type of transportation, electric vehicles have certain advantages in terms of energy saving and emission reduction, and reducing human dependence on fossil energy. The operation and planning of the system will inevitably have negative impacts, such as aggravating the peak load of the grid, energy loss, voltage drop, etc. [0003] At present, many tracking schemes have applied for patents, such as: the application number is CN201410098427, and the invention name is an electric vehicle charging load distribution method based on user wishes and travel rules; Sequential charging control method; application number is CN201410311518, and the name of the invention is an electric vehicle frequency modulation centralized dispatching control method for ...

AI Technical Summary

Problems solved by technology

[0004] Some of these patents propose an orderly real-time charging strategy under certain constraints. However, when a large number of electric vehicles are connected to the grid at the same time, it will cause some electric vehicles to wait in line for a period of time instead of making all electric vehicles Cars realize real-time optimized charging, and most of these technical solutions consider centralized continuous charging. Although centralized continuous charging is easy to solve complex scheduling problems, this centralized scheduling method requires complex communication networks and extensive two-way communication, tedious iterative process, and a large number of calculations, causing many inconveniences

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