Green electricity storage coupled wind compressed air high quality power generation method

Abstract

This invention relates to the field of wind power generation technology and discloses a method for high-quality power generation coupled with green electricity storage and wind-powered compressed air, comprising the following steps: S1: A fan drives an air compressor to work, and compressed air is stored in an air storage tank; S2: Air discharged from a first pneumatic booster pump is passed through a gas-liquid booster pump to compress water into a high-pressure liquid storage tank; S3: The remaining gas enters a second pneumatic booster pump to compress the heat discharged from the turbine and circulate it back to a heat storage tank; S4: When the air pressure is sufficient, the high-pressure air storage tank drives one turbine to start, and excess electricity is recovered to the heat storage tank; S5: During peak electricity demand, the liquid in the high-pressure liquid storage tank is converted into high-temperature and high-pressure gas to drive another turbine to start. In this invention, a dual-turbine power generation mode is adopted. The base load is borne by turbine No. 1 driven by high-pressure air, and during peak load, turbine No. 2 is driven by high-temperature and high-pressure steam, which works together with turbine No. 1 to bear the load. The output can be flexibly adjusted according to the grid demand.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a method for high-quality power generation by coupling green electricity storage with wind-powered compressed air. Background Technology

[0002] With the acceleration of energy transition, wind power, as one of the most mature renewable energy technologies, has seen its installed capacity continue to grow rapidly. However, the inherent intermittency, volatility, and anti-peak-shaving characteristics of wind power severely restrict its large-scale grid connection and consumption.

[0003] Random fluctuations in wind speed lead to unstable output power of wind turbines, with large fluctuations in voltage and frequency. Direct grid connection can impact the power grid, requiring a large number of peak-shaving power sources. During periods of low electricity demand, wind power output is often excessive, but existing energy storage technologies cannot efficiently and cost-effectively store this excess energy, resulting in significant wind curtailment. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of the need for a large number of peak-shaving power sources in the prior art, and to propose a high-quality power generation method that couples green electricity storage with wind power compressed air.

[0005] To achieve the above objectives, the present invention adopts the following technical solution, comprising the following steps: S1: The fan drives the air compressor to work, and then stores the generated compressed air in the air tank. When the pressure in the air tank reaches the threshold, the pressure is increased by the first pneumatic booster pump and stored in the high-pressure air tank. S2: The air discharged after the first pneumatic booster pump runs is compressed into the high-pressure storage tank by the gas-liquid booster pump. S3: The remaining gas enters the second pneumatic booster pump, which compresses the heat discharged from the turbine and recycles it back into the heat storage tank; S4: When the air pressure is sufficient, the high-pressure air tank drives a turbine to start. The turbine drives a generator to rotate and generate electricity through an intelligent transmission. Excess electricity is recovered into the thermal storage tank through energy storage appliances. S5: During peak electricity demand, the liquid in the high-pressure storage tank is heated by the heat storage tank and turned into high-temperature and high-pressure gas, which in turn drives another turbine to start. The turbine drives the generator to rotate and generate electricity through the intelligent transmission, thereby shaving the peak.

[0006] S6: Energy storage appliances are equipped with over- and under-voltage protectors to control grid fluctuations in milliseconds and eliminate the hazards of voltage dips.

[0007] As a further description of the above technical solution: The fan has several blades, each blade being crescent-shaped. The blades are rotatably connected to a shaft and controlled by a spring.

[0008] As a further description of the above technical solution: When the wind force is greater than level 10, the fan blades are pulled horizontally by overcoming the spring tension. When the wind force is less than level 10, the fan blades are kept in a normal state by the spring tension.

[0009] As a further description of the above technical solution: Once the pressure in the gas storage tank exceeds 10 atmospheres, the first pneumatic booster pump is activated to increase the pressure to 50 atmospheres and store it in the high-pressure gas storage tank.

[0010] As a further description of the above technical solution: The start-up pump pressurizes the liquid to 50 atmospheres and then stores it in a high-pressure storage tank.

[0011] As a further description of the above technical solution: The air compressor and the air tank are connected by a continuously variable transmission (CVT), which includes a driven pulley, a driving pulley, a belt, and a compression cylinder.

[0012] The present invention has the following beneficial effects: 1. In this invention, a dual-turbine power generation mode is adopted. The base load is undertaken by turbine No. 1 driven by high-pressure air, and the peak load is undertaken by turbine No. 2 driven by high-temperature and high-pressure steam, which together with turbine No. 1. The output can be flexibly adjusted according to the grid demand.

[0013] 2. In this invention, a 12-crescent-shaped fan blade design is adopted, which has low wind resistance and can start in a light breeze, thus expanding the wind speed range for wind energy utilization; the fan blades are equipped with a spring automatic protection mechanism, which automatically adjusts the angle in strong winds to avoid overload damage to the fan and extend the service life of the equipment.

[0014] 3. In this invention, energy is utilized in a cascade manner, and the overall system efficiency can reach more than 75%, which is far higher than that of traditional compressed air energy storage; the residual pressure of the pneumatic booster pump and the residual heat of the turbine, as well as the excess electrical energy in the power generation process, are fully recovered and utilized, thus avoiding energy waste. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0016] To address the problems mentioned in the background art, this application presents a method for high-quality power generation by coupling green energy storage with wind-powered compressed air, comprising the following steps: S1: The fan drives the air compressor to work and store the generated compressed air in the air tank; when the pressure in the air tank exceeds 10 atmospheres, the first pneumatic booster pump is started to increase the air pressure to 50 atmospheres and store it in the high-pressure air tank.

[0017] S2: The low-pressure air discharged after the first pneumatic booster pump runs drives the gas-liquid booster pump to compress the water to 50 atmospheres and store it in the high-pressure storage tank.

[0018] S3: The residual gas discharged from the gas-liquid booster pump enters the second pneumatic booster pump, which compresses and heats the low-temperature waste heat discharged from the turbine, and then recycles it back to the heat storage tank; at the same time, the excess electrical energy generated during the power generation process is also recovered to the heat storage tank through electric heating.

[0019] S4: When the high-pressure gas tank has sufficient pressure, it releases high-pressure air to directly drive the No. 1 turbine to rotate. After the turbine adjusts its speed through the intelligent transmission, it drives the generator to output stable electrical energy to meet the basic load requirements of the power grid.

[0020] S5: During peak electricity consumption periods, high-pressure water from the high-pressure storage tank is introduced into the heat storage tank. The heat in the heat storage tank is used to heat the water into high-temperature and high-pressure steam (expanding in volume by about 280 times). The high-temperature and high-pressure steam drives the No. 2 turbine to rotate, which in turn drives the generator to generate electricity through the intelligent transmission, thus achieving peak shaving of the power grid.

[0021] S6: Energy storage appliances are equipped with over- and under-voltage protectors to control grid fluctuations in milliseconds and eliminate the hazards of voltage dips.

[0022] Furthermore, the fan features 12 crescent-shaped blades made of fiberglass. These blades are rotatably connected to a central shaft and via a return spring. The spring preload is adjusted to correspond to a wind force of level 10. The crescent design effectively reduces wind resistance, enabling start-up in a light breeze. When the wind force exceeds level 10, the wind overcomes the spring tension, causing the blades to automatically rotate to a horizontal position, significantly reducing the windward area and protecting the fan equipment. When the wind force is below level 10, the spring tension returns the blades to their normal operating angle. The air compressor and air tank are connected via a continuously variable transmission (CVT). The CVT includes a driven pulley, a driving pulley, a belt, and a compressor cylinder. The compressor cylinder is connected to the air tank; as the pressure in the air tank increases, the diameter of the belt connected to the driven pulley gradually increases.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for high-quality power generation by coupling green energy storage with wind-powered compressed air, characterized in that, Includes the following steps: S1: The fan drives the air compressor to work, and then stores the generated compressed air in the air tank. When the pressure in the air tank reaches the threshold, the pressure is increased by the first pneumatic booster pump and stored in the high-pressure air tank. S2: The air discharged after the first pneumatic booster pump runs is compressed into the high-pressure storage tank by the gas-liquid booster pump. S3: The remaining gas enters the second pneumatic booster pump, which compresses the heat discharged from the turbine and recycles it back into the heat storage tank; S4: When the air pressure is sufficient, the high-pressure air tank drives a turbine to start. The turbine drives a generator to rotate and generate electricity through an intelligent transmission. Excess electricity is recovered into the thermal storage tank through energy storage appliances. S5: During peak electricity demand, the liquid in the high-pressure storage tank is heated by the heat storage tank and turned into high-temperature and high-pressure gas, which in turn drives another turbine to start. The turbine drives the generator to rotate and generate electricity through the intelligent transmission, thereby shaving the peak. S6: Energy storage appliances are equipped with over- and under-voltage protectors to control grid fluctuations in milliseconds and eliminate the hazards of voltage dips.

2. The method for high-quality power generation by coupling green energy storage with wind-powered compressed air, as described in claim 1, is characterized in that... The fan has several blades, each blade being crescent-shaped. The blades are rotatably connected to a shaft and controlled by a spring.

3. The method for high-quality power generation by coupling green energy storage with wind-powered compressed air, as described in claim 2, is characterized in that... When the wind force is greater than level 10, the fan blades are pulled horizontally by overcoming the spring tension. When the wind force is less than level 10, the fan blades are kept in a normal state by the spring tension.

4. The method for high-quality power generation by coupling green energy storage with wind-powered compressed air, as described in claim 3, is characterized in that... Once the pressure in the gas storage tank exceeds 10 atmospheres, the first pneumatic booster pump is activated to increase the pressure to 50 atmospheres and store it in the high-pressure gas storage tank.

5. A method for high-quality power generation by coupling green energy storage with wind-powered compressed air, as described in claim 4, is characterized in that... The start-up pump pressurizes the liquid to 50 atmospheres and then stores it in a high-pressure storage tank.

6. A method for high-quality power generation by coupling green energy storage with wind-powered compressed air, as described in claim 4, is characterized in that... The air compressor and the air tank are connected by a continuously variable transmission (CVT), which includes a driven pulley, a driving pulley, a belt, and a compression cylinder.