Gravity energy storage system with buffering function

Abstract

The invention provides a gravity energy storage system with a buffering effect. The gravity energy storage system comprises a vertical shaft; a gravity block is movably inserted in the vertical shaft, the gravity block and the side wall of the vertical shaft are in sealed connection through a sealing piece, the gravity block comprises a shell and a heat storage material filled in the shell, a first vent hole is formed in the bottom of the shell, an air compressor unit and an air expansion unit are connected to the top of the shell, and wire coil arrays are correspondingly wound on the inner wall of the vertical shaft and the outer wall of the shell. The lead coil array on the inner wall of the vertical shaft is connected with different power supplies in sequence, and each lead coil on the outer wall of the shell forms a closed circuit, so that alternating current with fixed frequency is applied to the lead coil array on the inner wall of the vertical shaft through the power supplies, and reverse circulating current is induced in the lead coil array on the outer wall of the shell; after the two groups of lead coil arrays with opposite current directions form a reverse electromagnetic field, upward acting force is applied to the gravity block through electromagnetic force, and when an emergency occurs, the gravity block is rapidly decelerated, so that the impact kinetic energy to the lower part of the vertical shaft during falling is reduced.

Description

technical field [0001] The present application relates to the technical field of electrical energy storage, and in particular, to a gravity energy storage system with a buffering effect. Background technique [0002] Gravity compressed air energy storage is to set a gravity block in the shaft, the gravity block and the shaft are sealed and connected by a sealing film, and a sealed air storage cavity is formed in the shaft under the gravity block for the storage of high-pressure gas. After being compressed, it is passed into the air storage chamber, and the gravity block moves upward, converting the energy of the compressed air into the gravitational potential energy of the gravity block for storage. During the energy storage process, the heat energy generated by the compressed air is usually heated by setting a heat exchange unit. However, the setting of the heat exchange unit makes the energy storage system complicated, and in the event of an emergency, the uncontrolled dow...

AI Technical Summary

Problems solved by technology

[0002] Gravity compressed air energy storage is by setting a gravity block in the shaft, the gravity block and the shaft are sealed and connected by a sealing film, and a sealed gas storage chamber is formed in the shaft below the gravity block for the storage of high-pressure gas. After being compressed, it is passed into the air storage chamber, and the gravity block moves upwards, converting the energy part of the compressed air into the gravitational potential energy of the gravity block for storage. However, the setting of the heat exchange unit makes the energy storage system complicated, and in an emergency, the uncontrolled downward acceleration of the gravity block will cause a large impact on the bottom of the shaft

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