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Integrated system and integrated method for wind power generation and compressed air energy storage

A technology of compressed air energy storage and compressed air, which is applied in the direction of wind power generation, wind engine, wind motor combination, etc., can solve problems such as power difficulties, limited application, environmental threats, etc., and achieve huge energy conversion benefits, improved energy conversion benefits, The effect of improving operating efficiency

Inactive Publication Date: 2014-10-08
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the storage of electric energy is difficult and expensive, such as using the most commonly used storage method - lead-acid battery, although its technology has reached a fairly mature stage, but factors such as scale and cost limit its application in remote independent programs , its cost per kilowatt-hour is several hundred dollars, which is almost impossible for high-power energy storage
In addition, battery maintenance and self-discharge are also technical bottlenecks associated with it, while also posing a threat to the environment

Method used

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  • Integrated system and integrated method for wind power generation and compressed air energy storage
  • Integrated system and integrated method for wind power generation and compressed air energy storage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1 The scheme in which the rotational speeds of the compressors at all stages are the same,

[0022] The pressure ratio of the three stages is 5, according to the change of the compression ratio and the air volume, that is, the pressure and the volume are approximately inversely proportional, so that figure 2 The number of compressors in the middle can be determined: as a total of 25 first-stage compressor units 12, after passing through the first-stage intercooler 13, the temperature drops to normal temperature, and then to the second-stage compressor unit 14, a total of 5 units, after passing through the second-stage The intercooler 15, the temperature is lowered to normal temperature, and finally enters the third-stage compressor unit 16, a total of one set, to produce 125bar high-pressure compressed air that meets the requirements. After cooling through the three-stage heat exchange, it is stored in the underground air storage room. So far, all 31 air com...

Embodiment 2

[0023] Embodiment 2 adopts the scheme that the number of the first two stages is the same, and the speed of the latter two stages is the same,

[0024] The pressure ratio of the third stage is 5. For example, there are 5 compressors in the first and second stages, and the speed ratio of the second stage and the first stage is 5:1; The rotational speeds of the two stages are approximately equal; after the three-stage compression, the air changes from the initial 1 atmosphere to a high-pressure gas of 125 atmospheres, and after being cooled by the three-stage heat exchange, it is stored in the underground air storage room. The turbines are all driven by redundant wind power, and the coupling of wind power and compressors can be realized.

Embodiment 3

[0025] Embodiment 3 The number of units and rotating speed at each level can also be set freely, and various setting schemes for the number of units and rotating speed can be produced.

[0026] The pressure ratio of the three stages is 5, for example, the ratio of the number of the three stages is 5:5:1, and the ratio of the speed of the third stage is 5:1:1; or the ratio of the number of the three stages is 25:5:5, and the ratio of the speed of the third stage is : 5:5:1; but the speed ratio of each stage keeps a constant ratio, so as to ensure the stable operation of the compressor system.

[0027] To sum up, through this method of multi-stage compression and inter-stage cooling, the compressor energy machine can be guaranteed to work under constant temperature compression, which can reduce the power consumption of the compressor and realize the efficient conversion of electrical energy into compression work. When the input of wind power changes, the speed of each stage will...

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Abstract

The invention discloses an integrated system with wind power generation and compressed air energy storage and an integration method thereof, which belong to the field of renewable energy source power generation utilization. The integrated system mainly comprises a wind power station, an air compressor system, an air storage chamber, a gas turbine and a generator. The integration method is a power generation method of changing unstable wind electricity into stable high-quality pitch peak electric energy by compressed air energy storage. When a power grid has low load, all or parts of wind electricity is used for compressing air; and during power consumption peaks, the compressed air is released to drive the fuel turbine to generate power. The integrated system has a strong pitch peak capability, and performs great action on receiving the wind electricity on a large scale for the power grid and the action on power grid pitch peak capability and safety performance. Meanwhile, in the mode of multistage compression and interstage cooling, the air compressor system can utilize discontinuous wind electricity to efficiently and stably compress the air under the condition that each stage of pressure ratio is approximately equal, and each volume / revolving speed maintains a constant ratio.

Description

technical field [0001] The invention belongs to the field of power generation utilizing renewable energy, and in particular relates to an integrated system and integrated method of wind power generation and compressed air energy storage. Specifically, the excess surplus power of wind farms is mainly used for compressed air energy storage, which is released to drive gas turbines to generate electricity during peak power consumption. In order to realize the optimal utilization of wind power generation. technical background [0002] Wind energy is a clean renewable energy with low power generation costs. my country has abundant wind energy resources and relatively mature wind power technology. By the end of 2010, my country's installed wind power generation capacity surpassed the United States with 41.83 million kilowatts to become the world's largest wind power country. According to the draft of the National New Energy Industry Revitalization Plan, the total installed capacit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D9/02F02C6/00F02C3/00F02C7/08F01D15/10
CPCY02E60/15Y02E10/72
Inventor 刘文毅杨勇平徐钢李守成张伟德黄健
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)