Electric power energy storage system and electric power energy storage method

Abstract

The invention discloses an electric power energy storage system and an electric power energy storage method, and belongs to the technical field of energy. The electric power energy storage system comprises a low-level pool, a compressed gas storage tank assembly, a high-level pool group, a water pumping energy storage system, a high-pressure water pipe, a low-pressure water pipe, a compressed airenergy storage system and a gas conveying pipe, wherein the compressed gas storage tank assembly is arranged in the low-level pool; the high-level pool group is arranged at the top of the compressed gas storage tank assembly; one end of the high-pressure water pipe is connected with the water pumping energy storage system, and the other end of the high-pressure water pipe communicates with the high-level pool group; one end of the low-pressure water pipe is connected with the water pumping energy storage system, and the other end of the low-pressure water pipe communicates with the low-level pool; one end of the gas conveying pipe communicates with the compressed gas storage tank assembly, and the other end of the gas conveying pipe is connected with the compressed air energy storage system. The electric power energy storage system can achieve water pumping energy storage as well as compressed air energy storage, energy storage is more flexible, geographical conditions are not needed,and selection of construction sites is more flexible.

Description

technical field [0001] The invention relates to the field of energy technology, in particular to an energy storage system and an electric energy storage method. Background technique [0002] For a long time, in order to meet the ever-increasing power load requirements, the power sector has to build power generation capacity according to the maximum load requirements. On the one hand, this has caused a large amount of surplus and waste of power generation capacity; on the other hand, the power sector has to limit power consumption during peak hours. Therefore, there is an urgent need for an economical, stable, reliable and efficient power storage system to match it and improve the situation where the peak-valley difference in system load is too large. Especially for nuclear power plants and other power systems that can only operate at high levels, the demand for power energy storage systems is even more urgent. [0003] Compressed air energy storage technology is an electri...

AI Technical Summary

Problems solved by technology

However, compressed air energy storage technology has two disadvantages: one is that compressed air storage needs to occupy a large volume, and unless geographical conditions such as underground caves are used, a large number of storage tanks need to be built, which is costly; Some time, at least a few minutes, less responsive

However, pumped water storage technology requires a high level to form the potential energy of water, that is, the construction of reservoirs and dams depends on special geographical conditions, the construction period is very long, and the initial investment is huge

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