Wind energy collecting device and wind power generation system thereof

Abstract

The invention relates to a wind energy collecting device and a wind power generation system thereof. The wind energy collecting device comprises a cylinder or title frame type tower body standing on the ground, the collecting device is characterized in that the top of the tower body is provided with two independent operative water pumps in a back to back manner, the tail ends of driving rotor shafts of the two water pumps are respectively provided with a wind turbine, the rotation directions of the two wind turbines are reverse, high-pressure water outlet pipes of the two water pumps are connected in a high-pressure water-delivery main pipe after confluence; and the tail end of the high-pressure water-delivery main pipe is provided with a ration nozzle, high-velocity waterflow jetted by the nozzle is used for driving each water turbine to rotate, and each water turbine drives the generator to generate electrical energy. The wind energy collecting device provided by the invention has the advantages that the design is reasonable, the structure is simple, and the wind energy utilization rate is improved; the volume of each water pump of the wind power generation system and the nozzle of each water turbine are quantitative, thereby ensuring the constant total drag coefficient of a whole waterpower drive system, the ratio of the rotation rate to wind speed of each driving rotor shaft of each water pump is constant, namely the blade tip speed ratio of a blade is constant; and the conversion efficiency of each wind turbine to the wind energy corresponding to different wind speeds can reach the maximum value.

Description

technical field [0001] The invention relates to wind power generation equipment, in particular to a wind energy collection device and a wind power generation system thereof. Background technique [0002] Wind power is one of the most important ways the world obtains energy. As the earth's resources are depleted, people's energy costs are getting higher and higher. However, wind is a natural product of the sun shining on the earth to make the air flow, and wind energy is strictly a product of solar energy. Wind energy is safe, clean, abundant and inexhaustible. The most important thing is that wind energy is a permanent and abundant local resource that can provide us with a long-term and stable energy supply. It has no raw material risk, no fuel price risk, and no carbon emissions. Although there are many advantages of wind power generation, due to the limitations of power generation equipment, wind power generation cannot be widely used, especially the power generation ef...

AI Technical Summary

Problems solved by technology

[0003] 1. In order to absorb large wind energy, traditional single-turbine wind turbines generally rely on increasing the sweeping area, which will lead to the configuration cost of some basic components and auxiliary facilities (such as foundation, tower, partial aviation system, platform, cabin, transportation, installation, etc.) increase

[0004] 2. The traditional wind turbine with a constant blade shaft speed can only guarantee the wind energy conversion efficiency at a certain wind speed, and the tip speed ratio is optimal to achieve the highest wind energy capture efficiency

In addition, in some existing patents, hydraulic pumps are also used to convert wind energy, and in the wind power generation system through hydraulic transmission, the output flow is controlled by using variable pumps, or various pumps are set in the pipelines for hydraulic transmission. A variety of hydraulic functional components are used to control the pressure and flow rate of the transmission fluid to meet the requirements of the optimal tip speed ratio. Although this barely meets the requirements of the tip speed ratio, it also makes the energy in the process of transmission, along the process. Increased pressure loss, increased energy consumption, less power generation

[0005] 3. The wind speed of nature changes at any time. For traditional wind turbines, in the entire energy transmission and conversion chain, each functional component needs to be configured according to the highest required parameters to meet its safety requirements. In most of the low wind speed time, only small loads can be used, which results in a huge waste of installed resources, that is, the annual utilization hours of power generation (converted to full-load installed capacity) are extremely low, which can only reach about 40% of general hydropower generating units.

[0006] 4. The transmission chain of the traditional wind generator is short and rigid enough. When the wind speed changes suddenly, it will cause unexpected impact damage to the mechanical parts, and the fatigue damage of the parts will occur early, which will greatly reduce the overall service life of the system.

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