Sinovel will supply Huaneng Renewables, a leading Chinese wind farm developer, with 17 units of 6-mw offshore wind turbines in the first stage of a pilot offshore wind farm in the Lingang sea area of Shanghai, Sinovel said on Thursday.

“This will be the first large-scale commercial application of 6-mw offshore wind turbines in the world,” said Tao Gang, Sinovel vice-president.

Tao described the move as a milestone in tapping offshore wind power. On October 8, 2011, Sinovel installed an independently developed 6-mw prototype, so far the largest in Asia, in Sheyang county, in east China’s Jiangsu province.

In 2010, the company won a public tender to supply 34 units of 3-mw offshore wind turbines generator to the Shanghai East Sea Bridge Offshore Wind Farm, the first pilot commercialized offshore wind farm in the country.

Sinovel won the Lingang offshore wind project by forming an alliance with Huaneng Renewables to defeat four rival teams in a public tender at the end of 2011.

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Wind turbine generator control unit (WPCU) is the core of each fan control, decentralized units deployed in the tower and cabin. Wind turbine site as harsh operating environment, the control system reliability requirements are very high, and wind power control system is designed for large-scale wind farm operation needs should be designed with high environmental adaptability and resistance to electromagnetic interference capacity, the system is structured as follows:

The field of wind power control system controllers include: pillar base of the main controller cabinets, cabin controller cabinet, variable pitch systems, converter systems, on-site touch-screen stations, Ethernet switch, fieldbus communication networks, UPS, emergency stop backup system, etc.

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As the main components of wind turbines generator , the choice has been the host bearing manufacturers are most concerned about, whether it is bearing its own design, or the bearing configuration options, have decided to host the wind turbines operating performance and service life.

As the complexity of wind generators operating conditions, the host higher maintenance costs and ensure the reliability of its operation, that is the life of wind turbines, has been troubled by the host manufacturer’s important issues. Bearing applications where efficiency is extremely important to the host. Therefore, based on the complexity of wind turbines, SKF and developed specifically for a special kind of bearing, that is, “Nautilus” bearings – a large contact angle with special double-row tapered roller bearings

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R & D personnel, according to Yang Longqing description of the project, which the wind vortex impeller-type off-grid wind turbine ball technology used is: 25M-35M high tower on top, install the ball impeller, the wind in any direction to the corresponding spherical impeller when the angle of the leaf surface, can promote the spherical wheel clockwise to start. Its working principle is that any direction of the wind, small wind turbines, stroke, high winds into the air inlet after the formation of eddy current, eddy current increases in accordance with theory, the more spherical vortex impeller in turn more powerful, and promote the vertical axis of the impeller speed ball will turn faster breeze in any direction to reach, small wind, stroke, normal operation of wind power when the purpose can be to solve the traditional wind turbine blade in the side wind, shelter from the wind, wind, small wind speed is not slow or not to switch the normal power generation fundamental problems. Currently, the State Intellectual Property Bureau has granted the project utility model patents, the admissibility of the project is patent.

Concerned that, because of this wind-type vortex impeller off-grid wind turbine does not require spherical strong electronic means to create common materials, installation, quick and easy, safe and reliable when used, does not require regular maintenance, operating costs are not high, the application prospects will be very broad, can be used in lamps, ships, tall buildings and other facilities off-grid electricity grid can also be used for wind power generation.

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• 2010/09/01 — apanese style will be built offshore floating wind turbine experiment
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Given that the noise and other issues, the wind generator located on the ground is difficult, therefore the establishment of the Ministry of Environment to consider the sea, would also help to reduce carbon dioxide emissions. Compared to the fixed placement in the sea wind power generator implantation, floating style wind turbines can be installed in waters deeper than 50 meters. Power generation capacity is expected to reach 2,000 kilowatts.

It is reported that the Ministry of Environment will invest 2 billion yen (about 140 million yuan) from 2012 to 2014 to the end of the building floating wind turbine style experiments, and to investigate the generation or transmission of the performance, durability, on marine life and so on.

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• 2010/10/13 — China’s first 5 MW wind turbine off the assembly line
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Permanent magnet direct drive wind turbines with unit reliability, simplify the structure, operation and low noise advantages of wind power generator in the field for today’s cutting-edge technology products. Back in February 2008, China South Locomotive and Electric Corporation on joint Goldwind start joint R & D offshore wind power generation products. They have absorbed the mature 1.2 MW and 1.5 MW wind turbine generator permanent magnet synchronous on the basis of merit, just 2 months time, completed the run with low speed, simple structure, small number of parts, reliability high, maintenance and other technical features of the 2.5 MW offshore wind turbine development, delivery Goldwind work into the test assembly.

China South Locomotive and Electric Company is the core component of our rail transportation equipment – traction motor and transformer technology leader. In 2004, the company and the Xinjiang Gold Wind Technology Co., Ltd. formed a strategic partnership, set up China Wind Engineering Research Center for Motor Research, and mass production has born out of 750KW, 800KW, 1.2MW and 1.5MW small wind turbines . Has become an annual output of 2,000 MW in China’s largest wind turbine manufacturer.

According to the China South Locomotive and Electric company called: to the middle of this month, only a short period of four years, the company’s megawatt-class vertical wind turbine production, from 50 to 380 units to 1,500 units to 2,000 units , to have scaled the four steps. This year will be delivered 60 sets of wind technology companies to gold, 600 will be delivered next year. These products have been successively Tongliao, Dabancheng, Dafeng, Jiangsu and other high-volume use of wind power.

China has rich wind energy resources offshore, offshore wind energy resources in 10 meters water depth of about 100 million kilowatts, 20 meters water depth of offshore wind energy resources of approximately 300 million kilowatts, 30 meters water depth of offshore wind energy resources of approximately 490 million kilowatts, the amount of wind energy in China sea value is 3 times the land-based wind energy, has broad development prospect. Wind power has the characteristics of environmental pollution, a 2.5 small wind generators 21.9 million a year, and can be while meeting the 12 166 families of electricity.

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Wind power in Finland, Denmark and other countries is very popular; western China is also strongly advocated. Efficient small-scale wind power generation systems, but it is not only by a generator of aircraft parts, but a certain scientific and technological content of small systems: wind turbine + Charger + digital inverter. Wind turbine by the nose, swivel, rear wing, leaf form. Each part of the very important functions of various parts: leaves used to receive through the nose into the wind power; tail so that leaves always opposite to the direction of the wind to get the most out of the wind; swivel head can rotate in order to achieve flexibility tail to adjust the direction of the function; head of the rotor is permanent magnet, the stator windings cutting magnetic lines to produce electricity.
Fluctuating wind power generation due to small wind turbines, so the output is 13 ~ 25V AC change, subject to the charger rectifier, battery charger store again, so that electricity generated by wind turbines into chemical energy. Then protect the inverter circuit, the battery inside the AC 220V chemical energy into electricity, can guarantee the stability of use.
Usually people think that wind power generator wind power solely by the decision, always wanted to buy a bigger wind turbine, which is not correct. The current to the battery charging wind turbines only, the energy stored by the battery up, people eventually use electric power, size and battery size have a closer relationship. Power depends on the size of even the size of wind, not just the size of the power head. On the mainland, a small wind turbine will be more appropriate than large. Because it is easier to drive and a small amount of wind power generation, continuous small wind, strong wind better than the moment a large supply of energy. When no wind when the wind it can also be caused by normal use of electricity, that is a 200W wind turbine can also be a large battery and inverter by co-use, access to 500W or 1000W and even more power out.
Use of wind generators, wind energy is pouring into our family used to the standard electricity, the savings level is obvious, a family only 20 yuan a year of electricity cost of battery fluid. Now the wind turbine generator performance than a few years ago a great improvement, previously used only in a few remote areas, wind generators connected directly to power a 15W light bulb, one out of a dark and often damage the bulb. And now because of technical progress, the use of advanced chargers, inverters, wind power generation as a certain scientific and technological content of the small systems, and can under certain conditions, instead of the normal electricity. Mountain to the system can not be a perennial money-lights; highway signs used it to do the night lights; mountain children can study up under fluorescent lights; urban high-rise roof, vertical wind turbine can also be used, which not only save but also real Green Power. Domestic wind generators, not only to prevent blackouts, but also increase the zest for life. In the tourism area, border, school, military and even behind the mountain, small wind turbine procurement is becoming a hot one. Radio enthusiasts could use their own technology in the wind power generation services for the mountain people, so that people watch television and lighting synchronized with the city, but also make their own enrichment work.

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According to the Danish consulting firm BTM, although the Danish Vestas and General Electric is still dominated by the global wind turbine supplier in the first two top spot, but Chinese companies are catching up.

Sinovel China Technology Co., Ltd., Xinjiang Gold Wind Technology Co., Ltd. and Dongfang Electric Group Co., Ltd. are among the world’s top ten industries, while Chinese companies are competitive export market.

HSBC renewable energy, resources and energy project director RobertTodd said: “The (Chinese manufacturers) has established an international sales team is actively bid for overseas contracts. Their real progress is only a matter of time.”

Goldwind Monday said its in Chicago set up a wholly owned U.S. subsidiary, announced Goldwind to the market dominated by General Electric launched its attack. Goldwind previously set up production bases in Germany, last year set up a subsidiary in Australia.

Sinovel is China’s largest wind power generator equipment company, ranked third in the world. The company exports to India last year, 10 sets of 1.5 MW wind turbine, also in March the company purchased from American Superconductor electrical system for its self-developed 5-megawatt wind turbine use. Company plans to export such future large-capacity wind turbine.

In the solar power market, the price of Chinese products than similar products in Europe or the United States is much lower. Some people worry that this could depress prices of wind turbines, solar power market, leading to oversupply, repeat last year’s mistakes.

Export potential

Often people complain that the Chinese domestic market, blocking, or by providing huge subsidies and cheap loans way to help its exporters an unfair competition.

German solar company Conergy and Solarworld have told the Chinese solar panel small wind turbines manufacturers expressed strong concern about the pricing behavior.

But at least for now, the Chinese wind turbine manufacturers are still the focus of the domestic market, the pace of these companies overseas is not for many international companies have too much of a threat, especially considering the logistics required to transport these massive costs.

Siemens spokesman said: “The Chinese small wind generators manufacturers began to visit the overseas market, such as in India or the Asia Pacific region. But still the focus of Chinese domestic enterprises.”

China is the world’s largest wind energy market in 2009 to increase its wind power generators capacity of 1.3 megawatts or more, than the original doubled.

China’s domestic manufacturers of wind turbines now occupy 80% of the market, and in less than a decade ago, Vestas, GE and Gamesa and other foreign companies are major players in the Chinese market.

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Because induction generator absorbs reactive power from the grid to make wind turbine power factor reduced, and net operating wind turbines generally require the power factor above 0.99, it is necessary to use capacitors for reactive power compensation . Due to random changes in wind speed, rated power is reached before the size of the generator output power of random variation, and therefore compensate for the capacitance of the input and removal of the need for automatic control, by a computer according to the changes in the output reactive power, control, compensation capacitor or the removal of sub-investment to ensure that power factor meet the requirements. For the doubly-fed generator is directly controlled by the control system and regulation of reactive power.

Yaw control and automatic Jie Lan

① Automatic Wind

Normal operation automatically when the yaw control system for wind, that is, when the cabin the wind direction deviated from a certain angle, the control system to the left or right to issue instructions to the transfer, the cabin began to wind, When you reach the allowable error range, automatically wind turbines

② Auto-Jie Lan

When the cabin in the same direction after the cumulative circle deflected 2.3, if the wind speed is less than the wind turbine at this time to start wind speed and no power output, then the shutdown, the control system makes the cabin in the opposite direction around the rotating solution of 2.3 ring; if the unit has power output at this time, automatic solution is temporarily bypass; if the cabin to continue to deflect the same direction, accumulated over three laps, then control the shutdown, solutions around; Ruo Yin Fault Auto Solutions is not around the success of the twisted rope of 4 laps, twisted rope mechanical switch will move , this time twisting cable fault reporting, automatic shutdown; to wait for manual Jielan operation.

③ Wind Wheel Protection

When there are big strong winds occur, downtime and the release of tip-damping plate, transferred to the greatest pitch, yaw 90 degrees leeward in order to protect the wind generators wheel against damage.

Shutdown Control

When the controller issued a normal shutdown command, the wind turbine will be shut down the following procedures: ① removal compensation capacitor; ② release tip sheet damping; ③ generator off-grid; ④ generator speed measurements down to set the value, the input mechanical brakes; ⑤ In case of car trouble while Lee received paddle in the cabin, such as 90 degrees yaw leeward.

When an emergency shutdown fails, the implementation of such as non-stop operation: First, removal of compensation capacitors, tip-damping plate movements, delay 0.3 seconds after the caliper brake action. Detection of instantaneous power is negative or less than the synchronous speed when the generator to convey; generator solution column (off-grid), if the braking time of more than 20 seconds, speed has not dropped a set value, then the closed paddle, cabin yaw 90 degree leeward.

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• 2012/02/04 — Sinovel, China’s largest wind turbines maker
• 2011/01/22 — Wind power control system including on-site wind turbine control uni
• 2010/11/27 — Bearing Solutions for wind turbine
• 2010/11/10 — Developed vortex-type off-grid wind turbine
• 2010/10/13 — China’s first 5 MW wind turbine off the assembly line
• 2010/09/01 — apanese style will be built offshore floating wind turbine experiment