Control method of charging and discharging integrated station based on improved v2g and priority scheduling

Abstract

The invention relates to a charge-discharge-storage integrated station control method based on improved V2G (vehicle-to-grid) and priority scheduling. The charge-discharge-storage integrated station includes a charge station, an electrical changing station and a cascade station. The charge-discharge-storage integrated station control method includes the steps: 1) respectively taking every electricvehicle entering the charge-discharge-storage integrated station and the energy storage battery in the cascade station as one group of independent battery energy storage system, and predicting the real-time load distribution of the charge-discharge-storage integrated station; 2) determining the discharge lower limit of each group of battery energy storage system; 3) determining the charge-discharge priority of each substation in the charge-discharge-storage integrated station; and 4) according to the real-time power grid scheduling command and the predicted real-time load distribution, takingthe discharge lower limit of each group of battery energy storage system as the constraint condition, and according to the charge-discharge priority, determining the charge-discharge state of the each group of battery energy storage system. Compared with the prior art, the charge-discharge-storage integrated station control method based on improved V2G and priority scheduling can effectively avoid reducing the charging experience of the user because of over discharge of the electric vehicle which takes part in V2G, receives excess discharging and receives power grid scheduling, and achieves win-win of the electric vehicle user and the power grid.

Description

technical field [0001] The present invention relates to a method for controlling an integrated charging, discharging and storing station, in particular to a method for controlling an integrated charging, discharging and storing station based on improved V2G and priority scheduling. Background technique [0002] In recent years, as the proportion of electric vehicles in my country's energy structure has increased year by year, my country's electric vehicle new energy industry has entered a stage of rapid development. The impact of the randomness and fluctuation of electric vehicle (electric vehicle, EV) load on the safe and stable operation of the power grid becomes more and more prominent with the large-scale access of EVs. The emergence of the charging-discharging-storage integrated station (hereinafter collectively referred to as the integrated station) is of great significance for solving a series of problems caused by EV grid connection. How to control the energy storag...

AI Technical Summary

Problems solved by technology

Since it is difficult to obtain an accurate stochastic energy storage model for the energy storage system of the integrated charging and discharging storage station, it is difficult to perform accurate energy scheduling for the internal energy storage of the integrated charging and discharging storage station

Traditional power generation scheduling methods include: economic scheduling, market competition scheduling, planned electricity scheduling, and energy-saving power generation scheduling. If EV random energy storage participates in V2G, if the above traditional scheduling methods are used, it may cause adverse consequences such as over-discharge.

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