Large-scale electric vehicle grouped participating in power grid frequency modulation-based control method

Abstract

The invention provides a large-scale electric vehicle grouped participating in power grid frequency modulation-based control method. The control method comprises the steps of acquiring power grid frequency fluctuation information, network-accessed electric vehicle information and electric vehicle parameter information by a power grid dispatching center; collecting initial time and controllable capacity information of an electric vehicle accessed to a power grid by an electric vehicle control center, and dividing electric vehicles into different subsets; dividing the electric vehicles into a one-way charging group and a frequency modulation group; dividing the electric vehicles into a frequency modulation charging group or a frequency modulation discharging group at the frequency modulationgroup, and limiting conversion frequency of the electric vehicle between a frequency modulation charging group and the frequency modulation discharging group by limiting charge-discharge conversion frequency of the electric vehicle; calculating controllable frequency modulation capacity and total controllable frequency modulation capacity of the electric vehicle of each subset; and dispatching and allocating a frequency modulation task to each electric vehicle according to a capacity proportion according to the forecasted total controllable frequency modulation capacity and a power required by regional power grid frequency modulation, and performing calculation to obtain expected charge / discharge power of the electric vehicle to achieve the purpose of frequency modulation.

Description

technical field [0001] The invention belongs to the field of power grid frequency regulation, and relates to a control method based on large-scale electric vehicles grouping to participate in power grid frequency regulation. Background technique [0002] As more and more renewable energy sources are connected to the grid, the frequency regulation problem of the grid becomes more difficult due to the fluctuation of its output. The access of large-scale electric vehicles is equivalent to a new type of controllable load, which has the characteristics of large controllable capacity and fast frequency modulation response. The frequency fluctuation of the grid can be effectively slowed down by using the technology of Vehicle to Grid (V2G) interaction between electric vehicles and the grid. [0003] At present, when using electric vehicles to participate in power grid frequency regulation, most of them adopt the method of decentralized access and centralized control. This method ...

AI Technical Summary

Problems solved by technology

[0005] When electric vehicles participate in frequency regulation, repeated charge-discharge switching and low charge and high discharge will shorten battery life and affect the enthusiasm of electric vehicle users to participate in grid frequency regulation. In the process of frequency modulation, the charging and discharging times of electric vehicles is a key problem to be solved urgently

For the entire electric vehicle cluster with frequency modulation, the existing frequency modulation control methods often ignore the requirements of individual users for the number of battery charge and discharge times

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