Flywheel energy storage capacity expansion system under condition of constant power of charging station

Abstract

The invention discloses a method for expanding capacity of flywheel energy storage under the condition of constant power of a charging station, which belongs to the technical field of constant-power charging station capacity expansion. The system comprises a charging station power grid and a high-power flywheel energy storage control system; the high-power flywheel energy storage control system comprises an AC filter, an AC / DC / AC bidirectional converter, a high-power flywheel energy storage control unit, a direct-current quick charging device and a controller; one end of the AC filter is connected with the charging station power grid through a three-phase circuit; the other end of the AC filter is connected with one end of an AC / DC / AC bidirectional converter through a three-phase circuit;and the other end of the AC / DC / AC bidirectional converter is connected with the high-power flywheel energy storage control unit and one end of the direct-current quick charging device; the controlleris connected with the AC filter, the AC / DC / AC bidirectional converter and the high-power flywheel energy storage control unit; the other end of the direct-current quick charging device is connected with an electric vehicle battery; the system can increase the number of charging piles and store electric energy under the condition that the capacity of the existing charging station is not changed; the increased charging requirement of the electric vehicle is met; and the cost for rebuilding the charging station or increasing the capacity of the charging station power grid can be saved.

Description

technical field [0001] The invention relates to the technical field of capacity expansion of constant power charging stations, in particular to a flywheel energy storage expansion system under the condition of constant power of the charging station. Background technique [0002] In recent years, electric vehicles have gradually become the development direction of the automobile industry because of their obvious advantages over traditional vehicles in terms of energy saving, emission reduction and reducing dependence on traditional fossil fuels. The construction of charging stations is also increasing year by year. DC charging piles are also widely used in the industry because of their high power, 60-100KW, and short charging time. Due to the high construction cost of the charging station and the large initial investment, the development is slow. The fixed capacity of the existing charging station cannot meet the growing demand for electric vehicles. If the existing charging ...

AI Technical Summary

Problems solved by technology

Due to the high construction cost of the charging station and the large initial investment, the development is slow. The fixed capacity of the existing charging station cannot meet the growing demand for electric vehicles. If the existing charging station can be upgraded to meet the growing use of electric vehicles If the quantity is reduced, the transformation cost will be greatly reduced, so that the market will be stable and develop better

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