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Compressed air electric power energy storage system

An electric energy storage system and compressed air energy storage technology, which are applied to equipment loaded into pressure vessels, gas/liquid distribution and storage, steam engine installations, etc. Energy system efficiency, changes and other issues, to achieve the effect of improving energy utilization efficiency, improving system efficiency, and improving energy storage efficiency

Active Publication Date: 2014-10-29
中储国能(北京)技术有限公司
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Problems solved by technology

[0004] In the process of realizing the present invention, the applicant found that the traditional compressed air power energy storage system has the following defects: during the process of energy storage and energy release, the pressure in the gas storage device changes, which will be unfavorable for the expansion unit and compressor unit. Continuous and stable work, which in turn affects the efficiency of the entire energy storage system

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  • Compressed air electric power energy storage system
  • Compressed air electric power energy storage system

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no. 1 example

[0036] The energy storage state and energy release state of the compressed air power energy storage system of the first embodiment of the present invention are introduced as follows:

[0037] In the state of energy storage, open valve 10 and valve 27, close valve 14 and valve 31; motor 1 drives the compressor unit to run with low-valley electricity; normal pressure air is compressed by low-pressure compressor 2 to increase temperature and pressure, and the compressed air passes through the pipeline 3 enters the cooler 4 for cooling; the cooled air enters the high-pressure compressor 6 through the pipeline 5 to continue to compress and increase the temperature and pressure; the air after the temperature increase and pressure increases enters the cooler 10 through the pipeline 9, and passes through the valve 10 after being cooled by the cooler And the pipeline 11 enters the constant pressure gas storage device 12 for storage; at the same time, the low-valley electricity drives th...

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Abstract

The invention provides a compressed air electric power energy storage system achieving hydraulic and pneumatic coupling. According to the compressed air electric power energy storage system, in the electric valley period, a compressor unit compresses air into a constant-pressure air storage device, liquid in the constant voltage air storage device is compressed into a variable-pressure air storage device through a liquid pump, and accordingly electric energy is converted to air and liquid internal energy for storage; in the electric peak period, heat of high-pressure air in the constant-pressure air storage device is absorbed through a heater, an expansion machine drives an electric generator to generate electricity, high-pressure fluid in the variable-pressure air storage device drives a hydraulic motor generator set to generate electricity, and the fluid is injected into the constant-pressure air storage device to keep constant pressure of the constant-pressure air storage device. The energy storage period of the compressed air electric power energy storage system is not limited, and the compressed air electric power energy storage system is suitable for power sources of various types and environmentally friendly, and has wide use prospects.

Description

technical field [0001] The invention relates to the technical field of electric power storage, in particular to a compressed air electric power energy storage system. Background technique [0002] In recent years, the number of large units in my country's power grid has continued to increase, the power system's own power regulation capability has been limited, and the peak-to-valley ratio of the system load has continued to increase. In order to ensure the safe and economical operation of the power grid, it is necessary to configure a power storage system . Electric energy storage system is an effective means to "stitch" intermittent energy and improve the utilization rate of renewable energy. At the same time, the power energy storage system is also a key technology to solve the problems of small capacity and large load fluctuations in distributed energy systems. [0003] At present, there are only two types of large-scale electric energy storage technologies: pumped water...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K27/00F17C5/06
Inventor 陈海生张雪辉严晓辉朱阳历谭春青
Owner 中储国能(北京)技术有限公司
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