Integrated power generation system for compressed air energy storage and combined cycle

Abstract

The invention discloses an integrated power generation system for compressed air energy storage and combined cycle. The integrated power generation system comprises a compressed air energy storage system, an air turbine power generation system, a gas turbine power generation system, a steam turbine power generation system and a heat storage device and a cold storage device, wherein the compressed air energy storage system is formed by sequentially connecting a motor, an air compressor and a large air storage chamber; the large air storage chamber supplies compressed air to the air turbine power generation system and the gas turbine power generation system; the heat storage device is used for absorbing the exhausted air sensible heat of the air compressor, and heating water supplied by the steam turbine power generation system through a water supply heat exchanger; and the cold storage device is used for acquiring cooling quantity from the low-temperature exhausted air of an air turbine, and performing heat exchange with a condenser of the steam turbine power generation system. The compressed air energy storage system is organically combined with a gas-steam combined cycle power generation system, heat energy in air compression and expansion links is optimally utilized, and the heat economy of the power generation system and the peak shaving performance of a power grid are improved.

Description

technical field [0001] The invention relates to a power generation system integrated with compressed air energy storage and gas-steam combined cycle, which belongs to the technical field of power generation. Background technique [0002] Compressed Air Energy Storage (CAES) is a large-scale energy storage method with the most development potential. It has the advantages of fast dynamic response, low cost, and environmental friendliness. The working process of a typical compressed air energy storage power generation system is as follows: during the low period of grid power consumption, use the relatively cheap and surplus electricity to drive the air compressor to compress the air, and store the compressed high-pressure air in a specific closed space ( such as an abandoned mine). During the peak period of electricity consumption, the high-pressure air and natural gas are mixed and burned to drive the gas turbine to generate power. [0003] The gas-steam combined cycle power...

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Problems solved by technology

[0004] The existing compressed air energy storage and gas-steam combined cycle power generation system simply utilizes the exhaust waste heat of the gas turbine or waste heat boiler, and cannot fully and reasonably combine the two organically, thus affecting the operation of the entire power generation system efficiency

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