CCTV News: On January 1, the world's largest wind power plant in ultra-high altitude areas, the Nagqu Omaringa 100 MW wind power project, was officially put into operation, which can send 200 million kWh of electricity to Nagqu City a year, meet the electricity demand of 230,000 people a year, and reduce carbon dioxide emissions by 200,000 tons.
At present, there are more than 50 new energy projects under construction or about to start on the Qinghai-Tibet Plateau.
The Omaringa Wind Farm site is 4,650 meters above sea level, and its airflow, air pressure and climatic conditions all put forward higher requirements for the performance of the unit.
Internally, the wind power industry says that "the wind in high-altitude areas is weak". This is because the magnitude of wind energy is directly proportional to the density of air, and the air density is low at high altitudes, and compared with the same wind speed conditions in plain areas, wind turbines at high altitudes rotate slower and generate less power, that is, the wind is strong but not moving.
Hu Jiansheng, head of the Tibet Oumartinga Wind Farm of the National Energy Group, introduced that from the beginning of the design, relying on its own "wind energy intelligent selection" platform, it has realized the integrated design of wind measurement, site selection, accurate evaluation of wind resources, and wind power plant planning, and then overcome the problems of low wind energy conversion efficiency and blade stall in ultra-high altitude areas through stability control technology.
Not only that, the wind turbine will also face extreme weather conditions such as hail and lightning splitting, and in the ultra-high altitude environment, there are also problems such as high ultraviolet intensity, drastic changes in high and low temperatures, and frequent erosion of sand, rain and snow, all of which put forward higher requirements for the performance of fan blades.
Hu Jiansheng, the person in charge of the Tibet Omatinga Wind Farm of the National Energy Group, introduced that the fan blades of the Omatingga Wind Farm adopt special topcoat technology to effectively inhibit the problems of aging cracking of paint and aging of exposed parts, and adopt the highest lightning protection level first-class design, which effectively ensures the safety and reliability of the unit.
In general, an altitude between 3,500 and 5,500 meters above sea level is defined as an ultra-high altitude. Exceeding this altitude is called extremely high altitude.
At 4,650 meters, the average altitude of the Omaringa Wind Farm, at this altitude, human body functions and equipment performance will be severely degraded.
4.0 MW is the single capacity of one unit of the Ouma Tingga Wind Farm, and it is also the largest single wind turbine that has been put into operation in the ultra-high altitude area of the mainland.
173 meters is the diameter of the wind turbine blades of the Omaringa Wind Farm, and its sweeping area is equivalent to the size of a standard football field.
100 MW is the total installed capacity of 25 wind turbines with a single capacity of 4 MW in the Omatinga Wind Farm, covering an area of 140,000 square meters, making it the world's largest wind power project in ultra-high altitude areas.
230,000 people, the wind drives the three large blades and the generator to rotate synchronously, each rotation can generate 6.7 kWh, and about 200 million kWh of electricity is sent to Nagqu City through the local power grid every year, which is equivalent to saving about 60,000 tons of standard coal, which can meet the electricity demand of about 230,000 people for a year.
Source: CCTV