Wind sailing
Wind energy can bring precipitation by transporting clouds containing large amounts of moisture inland.
Wind power
Wind power generation is based on the principle that wind power is used to rotate the blades of a windmill, and then the speed of rotation is increased by an incremental speed booster, which drives the generator to generate electricity. According to current windmill technology, a breeze of about three meters per second (the level of the breeze) can start generating electricity.
Wind power, which is becoming a worldwide craze, has no fuel problems and produces no radiation or air pollution.
Wind power is popular in Finland, Denmark and other countries; it is also strongly promoted in the western part of China. Small wind power generation system is very efficient, but it is not composed of only a generator head, but a small system with a certain amount of technology: wind turbine + charger + digital inverter. The wind turbine consists of a head, a rotor, a tail, and blades. Each part is very important, the function of each part is: the blades are used to receive the wind and through the head to electrical energy; tail so that the blades are always in the direction of the incoming wind to get the maximum wind energy; rotating body can make the head of the flexible rotation in order to achieve the function of the tail to adjust the direction of the; the rotor of the head of the rotor is a permanent magnet, the stator windings cut the magnetic lines of force to generate electrical energy.
Wind turbines are unstable because of the wind, so their output is 13 to 25V variation of alternating current, which must be rectified by the charger, and then charged to the battery, so that the wind turbine-generated electrical energy into chemical energy. Then use the inverter power supply with protection circuit to transform the chemical energy in the battery into 220V AC mains power to ensure stable use.
People usually think that the power of wind power generation is completely determined by the power of the wind turbine, and always want to buy a larger wind turbine, which is not true. The current wind turbine is only to charge the battery, and by the battery to store the electricity, people end up using the size of the electric power and the size of the battery has a closer relationship. The amount of power depends more largely on the amount of wind, not just the amount of head power. Inland, a smaller wind turbine would be more appropriate than a larger one. This is because it is more likely to be driven by a small amount of wind to generate power, and a constant small wind will supply a larger amount of energy than a momentary gale. When there is no wind, people can still use the wind power normally, that is to say, a 200W wind turbine can also be used through a large battery with the inverter, to get 500W or even 1000W or even greater power out.
Using a wind turbine is a constant stream of wind energy into our standard utility power for home use, and the savings are obvious, with a family's electricity use costing only $20 a year in battery fluid. And now the wind generator than a few years ago, the performance of a great improvement, before only in a few remote areas, the wind generator connected to a 15W light bulb direct electricity, a light and a dark and will often damage the light bulb. And now due to technological advances, the use of advanced chargers, inverters, wind power has become a small system with a certain technological content, and can replace the normal utility under certain conditions. Mountainous areas can use this system to do a year-round no-cost street lamps; highway can be used to do it at night signposts; mountain children can study under fluorescent lamps; urban high-rise roofs can also be used for wind motors, which not only saves but also is a real green power source. Family with wind turbines, not only can prevent power outages, but also increase the interest of life. In the tourist attractions, border guards, schools, troops and even backward mountainous areas, wind turbines are becoming a hot spot for people's purchases. Radio enthusiasts can use their own technology in the wind power generation for the people in mountainous areas, so that people watching TV and lighting electricity with the city synchronization, but also to make their own labor rich.
Wind energy is the most promising development of a clean energy, is a green renewable energy. It can be inexhaustible, inexhaustible. The utilization of wind energy, starting from the ancient windmill development to the present wind power generation, enough to show the progress of human science and technology. Since entering the 20th century, the uncontrolled exploitation of oil, coal, natural gas and other fossil energy sources on which people depend for their survival has not only seriously polluted our living space, but also damaged the natural environment.
In 2002, Greenpeace and the European Wind Energy Association (EWEA) *** with the presentation of the "Wind 12" report, which points out that by 2020, the green energy - wind power generation will be able to reach 12% of the world's total electric power, and China's wind power generation will account for 14% of the world's total wind power generation. Wind farms, compared with conventional thermal power plants and hydroelectric power plants, have a small stand-alone capacity, can be built in a decentralized manner, and are easily financed. With the increasing demand for energy and environmental protection law enforcement, wind power technology as a continuous development and improvement in the multidisciplinary high-tech, through technological innovation, process transformation and design, its advantages and economy, practicality will be increasingly apparent.
1 wind power development status
China is one of the world's earliest countries to use the wind, wind energy utilization history can be traced back to BC, but the scientific research for wind power generation started late, wind power in China to get the rapid development of the 1980s, so far a large number of wind farms have been built. Since the early 1960s, China has developed dozens of wind turbines of 100 W, 1 kW, 10 kW, 55 kW, 220 kW, and from the late 1970s, China began to develop a variety of miniature (100 W~1 kW) charging wind turbines, which have been rapidly popularized in pastoral areas and islands and have gradually formed industries, and some of these products have been sold to foreign markets. China's "Sixth Five-Year Plan" during the implementation of small-scale-oriented approach, has been in Inner Mongolia, Xinjiang, Shandong, Qinghai, Tibet, Zhejiang, Fujian, Jiangsu, Gansu, Guangxi, Liaoning, Heilongjiang and other provinces, autonomous regions, the construction of wind energy development and research pilot work. By the end of the 1980s, China's small wind turbine installed capacity of 6.7 MW, annual power generation of 6.3 GWh hours, medium and large-scale wind turbine research and manufacturing has also gradually begun.
1.1 The development of small wind turbines
Currently, China's small wind power generation technology is very mature, the construction is progressing faster, especially the manufacturing technology of the following 5kW units has matured, and a large number of popularization and use, the formation of mass production. 100, 150, 200, 300, 500 W and 1, 2, 5 kW small wind turbines, annual production capacity reached more than 30,000 units, and the largest sales volume is 100~300 W wind turbines.
1.2 Development of large-scale wind turbine
China's research and manufacturing of large-scale wind turbines is accelerating development. China YTO Group and Spain's power company, Xi'an Aviation Engine Company and Germany's Ende company jointly produced 660 kW of the main generator set, and has been installed in Liaoning Yingkou wind farm and grid power operation. In addition, Zhejiang Yunda Wind Power Equipment Factory produced four 250 kW generator sets, installed in Guangdong Nan'ao wind farm operation. In China, the main components of large wind turbines in the domestic manufacturing, its cost can be reduced by 20% to 30% than the imported units, localization is the inevitable trend of China's large wind turbine development. The localization of large wind turbines in China started from 250~300 kW units and developed to 600 kW. According to the production level and technical capability of China, the localization of large wind turbines is completely feasible. From the point of view of the construction history of wind farms, the country's first wind farm in 1986 in Shandong Rongcheng grid-connected power generation, the country's cumulative total of more than 190,000 units of small wind turbines installed and used around the introduction of the unit and the construction of wind farms one after another, as of now, our country has built a large number of wind farms, the formation of millions of kilowatts of power generation capacity. In Heilongjiang Province, Fu Jin wind farm, the single machine capacity has reached 960 kW, so that China's wind power generation to a new level.
China's wind energy resources are not as abundant as those in Europe, the United States and other developed countries, technology and economic strength is currently unable to catch up with developed countries. Grid coverage is also not high, especially in rural areas, animal husbandry areas and remote areas, the phenomenon of no electricity is very serious, in a fairly long period of time is not possible to solve all. Therefore, where the wind energy resource-rich areas, under the condition that the wind energy utilization has a certain degree of competitiveness, the wind energy should be developed and utilized as far as possible. The near future should focus on rural and pastoral areas, while the development of small and medium-sized wind turbines should be the main focus of the arrangement of promising projects. Most of the small wind turbines use battery storage mode of operation, mainly used to solve the life of electricity; medium-sized wind turbines play a role in solving the production of electricity, which should focus on the consideration of multiple medium-sized wind turbines and a single diesel generator networking power supply system.
1.3 Overseas wind power development
Wind energy