Domestic wind turbine equipment low - cost
In terms of wind power manufacturing technology and industrial technology integration, there is still a big gap between China and the international advanced level.
The first is the wind farm "abandon wind" power limit and consumption is not free.Last year, 20 billion kilowatt-hours of wind power were lost due to curbings, and 7.7 billion kilowatt-hours of wind power were lost in the first half of this year. Heilongjiang and Hebei provinces had curbings of more than 20 percent, jilin, Liaoning, Gansu and Inner Mongolia had curbings of more than 10 percent, and the national average was 10 percent.
Secondly, although the equipment quality of domestic wind turbine is improving year by year, the quality problem still cannot be ignored.According to him, the utilization rate of wind farms using domestic units is still lower than those using international advanced brands. According to longyuan's rough estimate, the overall utilization rate is about 6% lower.Some domestic units put into operation in the past five years have also experienced major quality and technical faults, such as hub cracks, spindle problems, bearing problems, gearbox failures, motor failures and so on.
At the same time, low-cost competition still exists for domestic wind turbine equipment, and the price of wind turbine is not expected to rise in 2014."Low price competition squeezes companies' profit margins and reduces their investment in product upgrading and technological innovation, which is not conducive to the healthy development of the industry."'said Qi.
But in the wind turbine design and key components, we still have a large room to catch up.In recent years, the independent design ability of Chinese enterprises has been improved, but efforts are still needed in terms of design experience and design software. In particular, the ability to independently design and develop new multi-megawatt wind turbine based on China's wind conditions is insufficient, and the wind turbine design software system suitable for China's resource conditions has not been developed.
At present, Europe has realized the batch application of 5~6 mw wind turbines and is designing and developing 10 MW wind turbines, while China's 5 MW wind turbine products and 6 MW wind turbine prototype are still in the trial application or field test stage.
In terms of key components, the control system of wind turbines above megawatt level in China is still in the trial production stage. Some key components of large wind turbines still need to be imported. The reliability of large gearboxes and generators needs to be improved.
In addition, compared with advanced European countries, China's offshore wind resources measurement and analysis technology is relatively backward, and offshore wind farm site selection technology and experience are insufficient.Moreover, China's offshore wind farm has small installed capacity, small single capacity of mainstream models, short operation time, and the reliability and adaptability of the units also need to pass the examination and verification.
In Europe, 3.6 megawatt, 5 megawatt and 6 megawatt offshore wind turbines are already in mass production and used in offshore wind farms, and 10 megawatt offshore wind turbines are under development.The offshore wind turbines that have been mass-produced and applied in China are 2.5 mw and 3 MW, and 5 MW and 6 MW wind turbines are still in the stage of trial and demonstration application.
In addition, there are also many gaps in wind farm design and construction, wind resource analysis, and wind power industry public research and test platform.