2010, 308 newly installed European upper hand in the Taiwan Strait power units, compared with 2009, offshore wind power installed capacity increased by 51%, the European offshore wind power has experienced record growth. The same period, the new European land-based wind power installed capacity 8.4GW, a decrease of 13.9%. This trend of wind power into the sea, in Europe has become increasingly apparent.
June 8, 2010, Asia’s first offshore wind farm in Shanghai Donghai Bridge 3MW project, 34 completed the Taiwan Strait upwind turbine commissioning, all of the grid into operation. To “Europe first offshore wind farm outside” as the beginning of China’s wind power has taken the step into the sea, and caused the global wind power generators industry attention.
The first round of offshore wind power in China has opened the tide. Against this situation, the wind, sharp and Xiang of China and other major electrical wind turbines manufacturers out of step, the reasons behind the deep thought-provoking.
October 2010, China’s first round of offshore wind power concession bidding round result, a successful bid Sinovel coastal, Sheyang two offshore projects, a total of 60 million kilowatts, accounting for 60% of the amount bid, but let the industry Surprisingly, the whole second tier of the Shanghai Electric Goldwind actually able to have equal shares, scored the final 20% share, and is known as “China’s wind power leader,” the performance of the gold wind technology industry is another disappointment.
This seems to be confirmed Goldwind has a working relationship in the U.S. market, CEO of developer MainstreamRenewablePower O’Connor (EddieO’Connor) discussed the wind of gold: gold wind technology to the development of offshore wind power not too interested.
As the world’s fourth wind power equipment suppliers Goldwind, in the global wind power industry is set off by the tide to enter the offshore wind power, hesitate before, indeed, puzzling.
I know that the wind turbine in the world, more than 85% growth in compact gear unit, especially in technology, stability and reliability in demanding marine unit, without exception, all adopt the technology is mature and reliable such technology and good programs, including 2 MW, 2.3 MW, 3 MW, 3.6 MW, 5 MW and other models at all levels, vendors, including Vestas, Siemens, Repower, Sinovel so all the major offshore small wind turbine manufacturers. So far, in addition to a Goldwind 1.5 MW test unit, the world has not within the first 2 sets of direct-drive unit into the sea. The golden wind of this unit from November 8, 2007 has achieved full power operation, has reached three and a half years, from the current Goldwind offshore wind power in the slow progress in terms of visibility, the unit’s operation is not optimistic . Direct drive permanent magnet unit is suitable for use as offshore wind turbine?
Permanent magnet direct-drive industry at home and abroad to the sea, has the same concern: At present, rare earth permanent magnet material in the unit cost is very high, and is currently the most used Ru-Fe-B rare earth permanent magnet sensitive to temperature and poor thermal stability, when the ambient temperature will exceed the value of the demagnetization; Permanent Magnet by vibration, temperature and role overload current, the magnetic performance may be reduced or demagnetization phenomenon occurs, will reduce the performance of permanent magnet motor, but also severe damage to motor. Early development of small-scale wind generator have serious permanent magnet demagnetization, the phenomenon of failure and thus can not generate electricity, which is where the problem has not perfect solutions. In addition, rare earth permanent magnet materials easily oxidized materials, and produce the electrochemical reaction, in the case of sea salt spray corrosion strong problem difficult to resolve; the same time, there is a permanent magnet materials, strong magnetic, can not repair under field conditions So if there are problems that only manufacturers can repair to return the scene is not maintainable, to run a big risk. Furthermore, from the perspective of operation and maintenance, direct-drive generator unit weight of large size, the replacement of maintenance inconvenient, reservation required professional installation vessel or large floating cranes to complete the work, but the installation of the world currently available large floating crane vessels and very few , and the scheduled timetable needs at least one year in advance, so the fault processing time can not be guaranteed. And the use of high cost of large offshore loading vessels, so the time cost of its maintenance costs are relatively high and the economy.
Recently, Kim, chairman of Wuhan Iron and Steel Wind Technology, said in an interview, direct-drive permanent magnet technology, lost a gear box that links directly into the permanent magnet wind turbine generator to generate electricity, thus reducing the hundreds of parts in 20 years without any maintenance during use, without the loss of power generation more efficient. The really eye-catching high-profile position.
According to industry reflected Goldwind specifically for the “Green Olympics” to build wind farms in the Beijing Guanting some fans, since the installation has been running since the cabin is because failure resulting in the overall unloaded more than to return the product to be repaired.