Large-capacity gravity energy storage device for power station

Abstract

The invention discloses a large-capacity gravity energy storage device for a power station, which comprises a counterweight body, a support device, a power lifting device and a power generation device, wherein the counterweight body is used for being lifted to high altitude and further converting electric energy to gravitational potential energy increased by the counterweight body; the support device comprises a support pillar and a cross beam erected on the support pillar; the power lifting device at least comprises a motor, a winding wheel shaft driven by the motor, a pulley arranged above the counterweight body and a pull cable, wherein the middle part of the pull cable bypasses the pulley, one end of the pull cable is fixed on the support device, and the other end is fixed on the winding wheel shaft; and the power generation device comprises a power generator, and the power generator is connected with the winding wheel shaft through a transmission part, thereby converting the gravitational potential energy of the counterweight body to the electric energy. Compared with the prior art, the large-capacity gravity energy storage device has the advantages of large-capacity energy storage, high energy density, small occupied space, high energy recycling efficiency, small limitation, a wide range of applications, no pollution, low investment, low operation cost and the like.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a large-capacity gravity energy storage device for a power station. Background technique [0002] Electric energy has the advantages of large-scale production, easy conversion into other forms of energy, long-distance transmission, centralized management, automatic measurement and control, etc., and is widely used in human life and social production activities. However, there is a big shortcoming in the application of electric power, that is, under the current technical conditions, it cannot be stored in large quantities in the form of electric energy, and the power generation and power load in the grid must be balanced. However, the demand for electricity is extremely unbalanced. There is a big difference between spring, summer, autumn and winter, day and night, working days and holidays. The load in the power system changes with time. The power load is composed of the e...

AI Technical Summary

Problems solved by technology

[0005] The pumped storage power station is a large-capacity energy storage method with an energy cycle efficiency of 75%. The construction of a pumped storage power station requires harsh geographical conditions, a large amount of water and good conditions for building dams and reservoirs. It is limited by natural conditions. The investment is huge and has certain application prospects, but it may damage the environment, relocate the population, submerge farmland and cultural relics, and affect the original ecological system. The impact is wide and some are negative.

[0006] Chemical batteries have low energy density, high cost, high technical requirements, limited life, need AC-DC conversion, and low cycle efficiency. They need some special elements with limited reserves on the earth. They are widely used in portable electronic devices and will be used in vehicles such as vehicles in the future. There are also good development prospects on the Internet, but it is difficult to meet the super-capacity energy storage demand required by the national backbone grid

[0007] Ultra-large-scale capacitors have the advantages of ultra-high power charging and discharging, and high cycle efficiency, but have low energy density and require AC-DC conversion. They can be used in conjunction with batteries in automobiles, but it is difficult to meet the needs of industrial and civilian energy storage.

[0008] Compressed air, electrolyzed water, superconducting electromagnetic or flywheel kinetic energy can all be applied in special fields due to their respective characteristics, but it is difficult to meet the needs of ultra-large-scale industrial and civil energy storage at the national backbone power grid level

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