29 四 11 As China’s leading wind turbine manufacturers
China is rapidly emerging as one of the world’s most voracious electric power consumers and the nation’s estimated energy requirements for the future are far greater than current power sources can provide. With that in mind, China is aiming to exploit the 9,000 square kilometers of highlands in the country’s northwest, southwest and the Tibet Autonomous Region where wind resources are abundant but challenges are formidable.
Great distances, rugged topography and deficiencies in infrastructure loom in China’s “Wild West” but the rewards are well worth the time and trouble development demands.
As China’s leading wind turbine manufacturer, Goldwind Science and Technology Company is taking the bull by the horns. A 1.5-megawatt direct-drive permanent magnetic wind turbine was recently installed at a pilot wind farm on Xitie Mountain, located in northwest China’s Qinghai Province.
Tags: wind turbine
22 一 11 China overtook the US to win the title of largest installed wind turbine capacity in 2010 globally
China overtook the US to win the title of largest installed wind turbine capacity in 2010 globally, though failed to meet the set quota of renewable energy in its energy portfolio.
Last year, the nation increased its total windmill power capacity to 41.8 gigawatts, up 16 gigawatts or 62 percent from the previous year, according to the data released Wednesday by the Chinese Renewable Energy Industries Association.
Favorable policies from the government have almost doubled the country’s wind power capacity every year since 2005, when the government set a target to make renewable energy account for one 10th of the country’s energy mix by 2010. But the target was not met, as hydro, solar and wind power generators made up a mere 9 percent of the country’s energy needs at the end of 2010, according to the association.
Despite greater installed capacity, China’s wind power generation in 2010 is lower than that of the US, according to the association data.
Grid-connected capacity lags behind installed capacity by more than 30 percent, higher than the 10 percent gap in developed countries, undermining China’s wind-power efficiency and effectiveness, according to Li.
“China must translate its massive installation to massive utilization, which requires the implementation of effective incentive policies and a thorough overhaul of the national grid,” said Yang Ailun, head of Greenpeace East Asia’s climate and energy campaign.
“Despite a renewable energy policy requiring grid companies to purchase all available electricity generated by wind farms, access to the grid is impeded by unstable, outdated grid infrastructure.”
Source: Global Times
Tags: wind turbine
29 十一 10 Owens Corning high-performance fabric appearance of wind turbine blades in China
Owens Corning in China, the United States launched a new Ultrablade performance fabric, use of the fabric of the composite material can significantly improve the performance of wind generator blades.
It is understood that compared with traditional fabrics, Ultrablad high-performance fabric and epoxy resin composite wind blades have longer, lighter, higher stiffness, etc., can make 6% increase in blade length, blade stiffness increased by 20%, leaf thickness reduction of 6%, 5% decrease in the total weight of leaves. With the use of conventional glass composite materials, the same size 2.0MW wind turbine, blades in the quality of fabric and resin reduced by nearly 1 ton.
According to reports, Ultrablade fabric solutions over the world in the Owens Corning plant into production. In China, this product will be in the Owens Corning plant in Changzhou and Beijing Doudian small wind turbines factory put into production, this new product in January 2011 officially listed.
Tags: wind turbine
27 十一 10 Host bearings wind turbine configuration
The traditional wind turbine bearings is configured for dual bearing support. According to the working principle of wind turbines, usually following transmission chain design: shaft, gear box (the growth rate box) and generators. The spindle, take two-bearing arrangement is more traditional and commonly used form of bearing types used in accordance with design requirements vary, but usually the more traditional bearings spherical roller bearings configured to configure or Tapered Roller Bearings configuration.
The advantage of dual-bearing spindle bearings configured to withstand wind loads for most complex, in addition to torque, basically there is no other load is passed to the drive chain gear box, gear box design to bring great convenience. However, this configuration also has its own drawbacks, such as longer transmission chain, in addition to spindle length, but also consider the main shaft and gear box connected to the coupling length. Therefore, in the small wind power generator, this configuration is more common. In the high-power wind turbines, the long drive chain means that a greater volume and higher manufacturing costs.
Spindle bearing arrangement is the latest solution for single bearing support. With the development of wind generators, high-power wind turbine development trend of the market, higher energy density also become the main goal of manufacturers competing to catch up, to the bearing design has brought great challenges.
In the high-power small wind turbines, it is necessary to ensure sufficient capacity to withstand greater wind loads loads. Therefore, the spindle, including the bearing size is bound to increase, and this will definitely result in the increase of the overall weight of the host, is followed by host-related components, including the tower and other parts of the manufacturing cost increases. Is there to improve the wind generator in power while reducing weight and reduce the wind turbine manufacturing costs? This became the main manufacturers and parts manufacturers are facing increasingly pressing issue, because the decrease in cost, which means the improvement of product competitiveness. For these purposes, SKF developed specifically for high-power wind turbines large contact angle tapered roller bearings
Tags: wind turbine
28 十 10 Longjiang Heavy wind turbine towers has been Successfully installed
October 24, Longjiang Heavy Machinery Equipment Co., Ltd Weihai production of wind turbine towers first off the assembly line and shipped to leave Downing Xiatai Yang Tai mountain field. The project is located in the South China Sea port industrial zone, by the introduction of large Shuibo town, it can produce tower 400, the sales of wind generator income of 440 million yuan.
Tags: wind turbine
22 十 10 China’s wind turbine manufacturing level has reached the international advanced level
In the recently held during the International Wind Energy Conference 2010, SKF’s global head of the renewable energy sector of the Shanghai Securities News StefanKarlsson accepted an exclusive interview. From a professional international parts supplier’s point of view, StefanKarlsson that similar Huarui, the wind and other leading local Chinese fan equipment, has reached more advanced international level of manufacturing wind turbines.
However, he also said, “One thing is certain is that we want wind turbine generator have several years of operating experience, to go through the test of time.” StefanKarlsson that in the long run, the fan is the relationship between the quality of the final cost nature of the problem. Domestic wind turbine manufacturer, has a cost in measuring features, is often easier to consider only the small wind turbine manufacturing costs, but it ignores some important aspects, is the wind turbine in its entire life cycle of the follow-up operating costs.
He disclosed that at present there are about 80 local Chinese about wind power generator manufacturer, SKF has a cooperative relationship with most of them. Market in China 5.4 billion in sales last year in China, SKF has more than 4,000 employees, more than a dozen manufacturing plants, two industrial services provided by SKF solutions SKF factories and a college. “Sales of wind energy products accounted for the proportion of our total sales is 5%, but, in the Chinese market, this proportion is much higher than 5%.”
Competitors in China on the issue, StefanKarlsson said that in the Chinese market, SKF’s main competitors, or those with international background of the imported bearings manufacturers. “Because of the domestic manufacturers of wind power generators, they are more willing to choose something to meet international quality standard products.”
According to its introduction, at present, SKF already has five technology platforms (bearings and bearing units, seals, lubrication systems, mechatronics and services) of the product, this time, SKF Group to bring its quiet operation of wind turbine bearings, can be divided into High bearing cylindrical roller bearings and WindLub central automatic lubrication system unveiled three new New China International Exhibition.
Tags: wind turbine
07 十 10 Hong Kong’s first wind turbine installed
Hong Kong’s first large-scale wind turbines installed and will be tested next Saturday, is expected to be the fastest production early next year. Hong Kong, which to the “green” power a new step.
According to reports, stands Village, Lamma Island in Hong Kong, the ridge of the “Windmill”, each year to provide electricity to 250 families. HEC, Tower 1, the company plans to build the capacity of 800 kW wind turbine, as the development of renewable energy pilot projects.
HEC company had, including the Po Toi Island, Lamma Power Station site and other sites are inspected, the assessment of the ecological, environmental, transportation, power grid connection, noise, wind and other factors, the final site in the South Lamma Island, Tai Ling install a wind turbine generator on the hill. The project in October 2004 the Government received EPA approval, the HEC short-term leases to the government to lease 2.5 million square meters of land for the construction, after more than six months to complete the mechanical assembly early this week, with a total investment of about 1,500 million.
It is understood that the project’s wind generator, the car leaves and tower bar, respectively, from Germany, Denmark order, worth about 600 million. Even the car leaves a total of tower 71 meters high, the top has a wind instrument and the yaw system, fan with a 360 degree rotation, can be remote from the central control room, make the car leaves automatically “Herd.” According to analysis, Tai Ling average wind speed of 5.5 meters per second, the year is expected that 90% of the time the wind is very suitable for wind power generators. When the wind speed 3-25 m per second, the generator can produce electricity directly into the existing power grid is estimated to produce 100 million kWh per year, for 250 4-person households for use throughout the year.
Tags: wind turbine
27 九 10 MW-class high-altitude wind turbine
China Wind Power Equipment R & D and small wind turbines manufacturing leader – Goldwind Science and Technology Co., Ltd. today announced that the company independently developed the first batch of two 1.5MW wind turbine at high altitude has been in recent days the official underlined. This type of product for China’s “wind power virgin” in high altitude areas of Southwest and Northwest tailored to market segments in high-altitude wind technology development for the gold new growth momentum.
This type of wind turbine in the officially approved in December 2009, relying on Goldwind global R & D platform and since 2001 kilowatt high-altitude experience in product research and development, just 9 months we successfully completed all the R & D and manufacture of . vertical Wind turbine designed to take into account the low air density at high altitude, frequent lightning and high solar radiation and other special operating environment, increased use of targeted leaves, improve the insulation properties of thermal radiation and enhancing the comprehensive mine advanced process technology, is a suitable application of high altitude wind turbine products.
The two used in Qinghai 1.5MW products will enable high-altitude test XITIESHAN wind power technology demonstration projects. The project is funded by energy companies to invest in China Three Gorges Construction of the new, with a total installed capacity of 3MW, planned before the end of the grid, the generating capacity up to 600 million kwh. The project is the second Goldwind Dali in 2008 were equipped with 41 sets 750kW mill wind farm wind turbine at high altitude after the development of the market segments in the high altitude made significant progress in another. Goldwind run according to their performance, to improve the timely and start the mass production models of the product.
China’s current wind farm projects have been developed, 90% concentrated in the high altitude region. Relatively good wind resources in the higher elevations of Yunnan, Qinghai and Tibet and other regions, are not installed or installed to achieve very little. These areas can be developed over an area of 9,000 square kilometers of wind power, wind power installed capacity is expected to reach 4,700 megawatts, equivalent to the end of 2009 China’s total installed capacity of 2,500 MW of wind power to nearly 1.9 times. The local government in developing wind energy, a positive attitude towards economic development. The far-sighted Goldwind MW of high-altitude launch models will be less developed regions in promoting the local wind energy development to accelerate economic development, as gold continued development of wind technology to provide new growth momentum.
Currently, 1.5MW wind turbine is the main product Goldwind. With the global trend of large-scale wind turbine markedly accelerated in recent years, the wind has launched its 2.5MW technology products and accelerate the development of 6MW products. However, customer demand has a significant market segments, 1.5MW wind turbines will be profitable. At this point, as the market segments Goldwind strategy to expand the results, 1.5MW of the low-speed, low temperature, intertidal zone, offshore and high altitude wind turbines to date have been fully unveiled. This extension of 1.5MW wind generators manufacturer in the product life cycle and develop new business growth areas of great significance to the customers that Goldwind strong R & D strength and “find and create value for customers” business philosophy.
Tags: wind turbine
24 九 10 Floating wind turbine unveiled Urumqi Fair concern
Corps in the second division of Urumqi Fair booth, a breeze with the electric fans will be able to attract many investors generation of products. “This is our invention of maglev wind turbines, no matter what the wind direction, wind, and only the wind, it can generate electricity.” The person in charge of the booth introduced to Li Yong.
Li Yong said, breaking the previous magnetic levitation wind power generator product, it is not the shackles of wind direction and wind, very scientific, which uses magnetic levitation technology, combined with a super magnet generating the magnetic coil will be suspended in a certain space, the generator No case of mechanical friction, the fan motor rotation and cutting issue of AC magnetic field lines. A wind can smooth and efficient operation of high technology.
“The product is the biggest advantage is that there is still an area of small, low cost, high reliability, one only 19,800 yuan, compared with the traditional horizontal axis wind turbine the same wattage by 40% of the generating capacity, the applicable on solar wind generator by complementary charge the battery, through the inverter to power the LED lamps, lights, surveillance systems, home electrical equipment, is a new green clean new energy. “Yong said.
Urumqi Fair these days to stand on the Corps of second division a lot of people are abroad, in Xinjiang and other businessmen came to discuss. Now, there are Kazakhstan, Kyrgyzstan and other countries signed an agreement, there are many areas in Xinjiang have set the intention, in recent days will be signed. “I did not think a few days to have such a great influence to the propaganda I am Urumqi Fair, scheduled this year we only had two booths, Urumqi Fair will be upgraded next year, China wind turbines – Asian and European Fair, influence will certainly be bigger, we are ready to set a few booths in a multi
Tags: wind turbine
14 九 10 Wind Turbine Control
Wind power is the use of wind-driven turbine blades rotate, and then through the growth machine will improve the speed of rotation, to encourage generators. Wind generator system is mainly composed of wind turbine and generator of two parts. When the wind speed below the rated wind speed, rotor speed regulation, the maximum possible capture wind energy, which is speed control; and when the wind speed above the rated wind speed, due to its mechanical and electrical strength of wind power generators constraints, as well as on the power grid quality of the generator output power stability and hope in the power rating is about, this is the power control. Power control approach can generally be divided into fixed pitch control and pitch control.
With the computer technology and advanced control technology to the field of wind power, wind generators control technology has also been rapid development, the control set from a basic single pitch to pitch stall control and variable speed control direction. Pitch adjustment with its outstanding advantages, smaller blade force, blade to do more light, pitch angle can be wind turbines manufacturer speed automatically adjust the size, which can absorb as much wind energy into electricity at the same time In the high-speed section of maintaining stable output power.
Therefore, in order to enable the system to maximize power output, wind turbines generally use the following control strategy: the wind speed below the rated speed of the case, the use of adjustable speed generator mode, so that the maximum power output of wind generator manufacturer ; in wind speed above the rated wind speed situation, with variable pitch adjustment means that the system is constant in the power area, so that the wind turbine output power to maintain stability.
Tags: wind turbine
