Adiabatic near-isothermal compressed air energy storage system and operation method thereof

Abstract

The invention discloses an adiabatic near-isothermal compressed air energy storage system and an operation method thereof. The system comprises a heat accumulator, an electric heating device, a reheater, a turbo expander, a second water pump, a water turbine, a reservoir, a high-pressure air storage space and a low-pressure air storage space, wherein the high-pressure air storage space and the low-pressure air storage space are communicated with each other; a multi-tank water pumping compressed air energy storage device is arranged on a pipeline from the low-pressure air storage space to the high-pressure air storage space of a medium; the high-pressure air storage space is sequentially communicated with the reheater and the turbo expander; the turbo expander is communicated with the low-pressure air storage space; the reheater is communicated with the heat accumulator and the electric heating device; the low-pressure air storage space is a water-gas co-containing space; the low-pressure air storage space, the water turbine, the reservoir and the second water pump are sequentially communicated; electric energy input ends of the heat accumulator and the electric heating device are connected with an electric energy output end of a wind power system or a solar power generation system; and the consumption requirement of renewable energy sources is met, the requirements of power type and energy type energy storage systems are combined, the capacity is large, response is fast, and the system does not have an external heat source or consumes fuel.

Description

technical field [0001] The invention belongs to the technical field of compressed air energy storage, and in particular relates to an adiabatic near-isothermal compressed air energy storage system and an operating method thereof. Background technique [0002] At present, large-scale power generation systems in the form of photovoltaics, wind power, and thermal power have been built in some areas rich in wind and light resources. Renewable energy has the characteristics of randomness and volatility. In order to meet the needs of the power grid, it is necessary to build a large-scale energy storage system. At this stage, the energy storage part used in conjunction with photovoltaic power plants and wind farms is mainly electrochemical energy storage. [0003] Electrochemical energy storage has two drawbacks: [0004] 1. For a certain electrochemical type, the charge and discharge rate is generally fixed, and the adjustable range is small. At the same time, the electrochemic...

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Problems solved by technology

[0007] In order to solve the problems existing in the prior art, the present invention provides an adiabatic near-isothermal compressed air energy storage system and its operating method to meet the consumption requirements of renewable energy, combining the requirements of power-type and energy-type energy storage systems, the capacity Large, fast response, the system has no external heating source or fuel consumption, and can simultaneously meet power and energy requirements during the energy release process

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