Wind power generation is no stranger in our daily life, but nowadays, high-altitude power generation is entering people's field of visionCompared with traditional wind power generation equipment, this efficient and portable technology not only brings us surprises, but also creates infinite possibilities in our clean energy field.
Recently, China has made a major breakthrough in the field of technology, which has put Chinese science and technology once again at the center of the world stage, through the successful grid-connected power generation of the Jixi new wind power project in Anhui Province, ChinaThis milestone achievement further demonstrates China's strength and influence in scientific and technological innovation.
The way in which electricity is generated in our country
Globally, the transformation of the energy structure and the improvement of environmental awareness have become urgent issues, with the increasingly severe challenges brought about by environmental pollution and climate changeNew energy power generation has become a popular field of research, and it not only provides clean energy, but also helps to reduce greenhouse gas emissions.
The cost of thermal power generation includes the initial installation cost and the ongoing power generation cost, of which the cost of coal accounts for a considerable proportionBut it also brings the issue of environmental costs, and with the improvement of environmental awareness and the promotion of policies, those coal-fired power plants located in heavily polluted areas are gradually being closed.
The installed cost and power generation cost of hydropower are relatively low, but there is a certain risk cost due to the instability of water sources, and the long-term drought caused by global climate change also has a certain impact on hydropower generation.
As a high-end power generation method, nuclear energy has a high cost, a long construction time and hidden costsIn the new energy situation, nuclear energy is inferior to wind and solar power generation in terms of environmental protection and technical costs.
With the continuous progress of technology and the continuous expansion of industrial scale, the cost of power generation of these two clean energy sources is gradually decreasing, and the world's largest investment in clean energy power generation is increasing day by day, providing strong support for the development of wind and solar energy.
In terms of new energy power generation technology and market development, especially the progress of the photovoltaic industry, it is eye-catchingAs an important part of new energy, distributed photovoltaic power generation is moving from the edge to the mainstream.
This model can not only realize the direct connection between power generation and consumption, but also significantly reduce the loss and cost in the transmission process, large-scale ground-mounted photovoltaic power plants with their efficient power generation technology and large-scale energy managementIt has created a new business model for the photovoltaic industry.
The wind power industry is also struggling to catch upWith the advancement of technology, wind turbines are becoming more efficient and the cost is decreasing.
From land to sea, the application scenarios of wind power generation are expanding, especially offshore wind power generation has become a new favorite in the field of new energy due to its higher wind stability.
In this process, the role of policy cannot be ignored, and it plays a key role in energy development planning and electricity price policy, promoting the development and application of new energy technologies through various incentivesThese policies not only help guide the direction of market development, but also play an important role in the energy transition and carbon emission reduction.
Wind power
Wind power is an energy source that uses the natural force of the wind to drive the blades to rotate, resulting in electrical energyIts basic structure mainly includes components such as impellers, engine rooms and towers.
Blades are very important in wind turbines and are inspired by the wings of airplanes. When the wind blows over the blades, it creates a unique pressure difference between the top and bottom, which pushes the blades to rotate.
The speed of rotation of the blades is closely related to the strength of the wind, and only a light breeze is requiredFor example, a wind speed of 3 meters per second is enough to make the blades rotate happily, which in turn is converted into a steady stream of electricity.
Although the speed of rotation of the blades is not satisfactory, and it takes a certain amount of time for each revolution, such a speed is not enough to directly drive the generator to generate electricity, so in order to increase the speed and drive the generator smoothly, we need to install a gearbox between the blades and the generator.
This gearbox can significantly improve the efficiency of the generator by changing the gear ratio, ensuring the smooth operation of wind power generation.
In the workflow of a wind turbine, the blades must be precisely aligned with the wind direction, a requirement that is measured by a wind vane at the top of the nacelle and implemented by a yaw system, with the current generated by the generator being boosted by a transformer at the bottomIt is then fed into the grid for transmission. All these steps ensure the most efficient use of wind energy and a stable and reliable power output.
The tilting mechanism under the blades can adjust the angle of the blades according to the real-time wind speed to maximize the use of wind energy. This design concept not only improves the utilization of wind energy, but also helps to enhance the stability of wind power generationHowever, there are also some controversies about wind power generation, such as the impact on the environment and climate, and the different attitudes towards wind power at home and abroad.
Although wind power is still controversial, its development and application prospects as a renewable energy source are still generally optimistic, with the continuous progress of technology and the enhancement of scale effect, the cost of wind power generation is gradually decreasingThis low cost, high efficiency and environmental protection make wind power an attractive investment area.
But now, our country is not only satisfied with wind power generation on the ground, but also tries to move high in the sky.
High-altitude wind power
Wind power is renewable and is still a clean energy source, and has been widely used around the worldAs one of the world's largest wind power markets, China's installed wind power capacity is already among the highest in the world.
Although onshore and offshore wind resources are abundant, the development of high-altitude wind resources is still in its infancy, and the emergence of high-altitude wind power generation technology aims to further improve the efficiency and productivity of wind power generation by taking advantage of stable and abundant wind resources at high altitude.
The principle of high-altitude wind power is like flying a kite, imagine thatThe kite flutters in the air and is connected to the ground by a kite string.
Similarly, high-altitude wind power uses an aircraft to rise to a high altitude and is connected to ground facilities by a tethered component, which moves in a predetermined path when the aircraft is affected by the wind.
This movement pulls on the tethered parts, just as a kite string is blown by the windThese pulls are then used to drive generators to generate electricity, which converts the kinetic energy of the wind into electricity.
The advantage of this type of power generation is that the stability and abundance of high-altitude wind resources are much higher than that of surface and offshore wind resources, so it can provide more stable power output.
The realization of high-altitude wind power generation relies on the coordinated work of four core equipmentAircraft capture wind in the air as an energy source.
Tethered components act as bridges to ensure a stable connection between the aircraft and ground facilities, and generators efficiently convert captured wind into electricity, providing a steady stream of power to the power systemGround facilities play a central role in monitoring and control, ensuring the smooth running of the entire power generation process.
In addition to components, there are actually three types of high-altitude power generation technology, tethered kite aircraft include two forms: parachute ladder and gliding, in which the parachute ladder aircraft provides lift through helium balloons, and gliding aircraft rely on their own gliding performance.
The advantages and disadvantages of each type of power generation system are analyzed as follows:The tethered kite-like aircraft system is simple to set up, low cost, and easy to control, but its lift movement is limited and the power output is unbalanced.
In the tethered aircraft power generation device, it can adapt to the complex and changeable wind environment and provide a variety of flight mode options, but due to the influence of wind power and aircraft materials, the device has certain challenges in balancing wind energy capture and safety.
In contrast, the tethered aerostat type power generation device is easy to operate and can maintain stable power generation for a long timeHowever, it is larger in size and less resistant to wind, resulting in relatively little power generation.
The key technologies of the power generation system include the stability and safety of the aircraft, the efficiency and reliability of the generator, and the supporting and maintenance of ground facilities.
The efficiency and stability of the generator are crucial to the productivity of the power generation system, and in order to improve the energy conversion efficiency, it is necessary to continuously optimize the design and selection of the generatorThe improvement and daily maintenance of ground facilities is the cornerstone of ensuring the long-term and stable operation of the entire power generation system. This requires regular inspections and maintenance of our facilities to ensure their proper operation.
The efficiency and reliability of the generator directly affect the productivity of the power generation system, and it is necessary to improve the energy conversion efficiency by improving the design and material selection of the generator, and the supporting and maintenance of ground facilities is the basis for ensuring the long-term stable operation of the power generation system, which needs to be maintained and managed regularly.
Prospects for high-altitude power generation
In the emerging field of aerial power generation technology, we are witnessing a revolutionary changeAs an innovative way to obtain energy, aerial power generation technology not only has important environmental significance, but also indicates the future direction of the energy industry.
In aerial power generation technology, aircraft use wind power to reciprocate in a specific altitude range (500 meters to 3,000 meters), thereby driving ground generators to generate electricity.
When implementing this scheme, it is ensured that it does not interfere with the normal flight of conventional aircraft, in order to ensure the stability of the power generation processCareful use of flight control technology and optimization of the efficiency of the tow rope are not only related to the continuity of power generation, but also to the stability of the entire system.
The material selection of the aircraft and tow rope must also take into account the requirements of light weight and high strengthto ensure the reliability and safety of the entire system and minimize the impact on aviation activities.
In China, the unremitting efforts of scientific researchers and the innovative design of enterprises have promoted the development of aerial power generation technology, and innovative attempts at air-based power generation technology, such as the application of lightweight and efficient power generation equipment in special occasions, have demonstrated its great potential in addressing energy challenges.
However, aerial power generation technology also faces many difficulties in the development process, the first of which is that its impact on the ecological environment must be taken into accountIn particular, the impact on the migration path of birds, and the operation of aircraft may be restricted and interfered with by air traffic control, and the solution of technical problems and the reduction of costs are also urgent problems to be solved.
Although the new wind power generation technology faces certain risks and unknowns, we are still confident that it will be applied on a large scaleWith the construction of distributed energy networks and smart grids, new wind energy is expected to meet the electricity demand of regions more efficiently.
Looking to the future, we have reason to believe that air power generation technology will contribute more to the development of clean energy and play a key role in the transformation of the global energy structure.