Charging and discharging optimal control method of electric car group

Abstract

The invention provides a charging and discharging optimal control method of an electric car group. The method comprises the steps that charging and discharging time period data in a next day of each car participating in charging and discharging is obtained; the time in the next day is dispersed into a plurality of time slots, and a time slot set is generated according to the charging and discharging time period data in next day of all cars; power flow data and sensitivity data of each time slot in the time slot set are obtained; and the charging and discharging power of each car in each time slot is calculated by adopting an interior point method according to the sensitivity data. The charging and discharging optimal control method relieves the voltage fluctuations, lowers the load peak and off-peak difference, reduces the distribution network energy loss, and increases the economical benefits of electric car users.

Description

technical field [0001] The invention relates to the technical field of electric vehicle charging, in particular to a charging and discharging optimization control method for electric vehicle groups. Background technique [0002] Electric vehicles can reduce human's dependence on oil resources. With the depletion of global oil resources, electric vehicles are favored compared with traditional fuel vehicles. With the rapid development of electric vehicle technology, it is welcomed by more and more people due to its less pollution and low operating cost, and the market share of electric vehicles is increasing. With the development of electric vehicles, electric vehicle charging stations are gradually being built, which will bring new load growth to the development of charging facilities and the operation of the power grid. [0003] When multiple vehicles are charged in a fixed charging mode at each charging station, for example, when charging in a constant current-constant vol...

AI Technical Summary

Problems solved by technology

[0003] When multiple vehicles are charged in a fixed charging mode at each charging station, for example, when charging in a constant current-constant voltage-trickle mode, the load fluctuation of the grid system will increase, and the existing voltage control measures are difficult to meet the user's requirements for voltage limitation; Moreover, the concentrated power consumption of strong random loads leads to an increase in the peak load of the system, resulting in insufficient installed capacity of the power system

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