Global wind power manufacturing technology development presents twelve characteristics (1)

1. Industry concentration is the overall trend In 2009, the world’s top ten wind turbine manufacturers accounted for 78.7% of the global market share, and the world’s top 15 wind turbine manufacturers accounted for 88.1% of the global market share. The top five companies including Denmark VESTAS, US GE WIND, China Huarui, Germany ENERCON, and China Goldwind accounted for 49.8% of domestic and foreign market leaders. It can be seen that the world wind turbine manufacturing enterprises have formed a situation dominated or monopolized by more than a dozen large wind turbine manufacturers.

In recent years, mergers, acquisitions, mergers and acquisitions among wind power equipment manufacturers have intensified. France's Areva Group acquires Multibrid; Denmark's Vestas merges with NEG. Micon Corporation; US GE acquired German Enron Wind Power; Siemes bought Danish AN/Bonus and German winergy AG; Indian Suzlon Corporation held Repower; Goldwind acquired German Vensys;

Hunan Electric Co., Ltd. purchased 10 million Euros from the Dutch company Darwin; Zhong Fu Lianzhong purchased the German NOI Company; AVIC Huiteng acquired the Dutch CTC Blades Company in 2009; US GE and Hadian Group formed a joint venture to form a universal Ha Electric Wind Energy (Shenyang) The company and Harbin General Wind Energy (Jiangsu) Company. In addition, major companies have established production bases in major markets. A large company is equivalent to the integration of multiple companies.

2. Horizontal-axis wind turbine technology has become the mainstream horizontal-axis wind turbine technology. Because of its high wind energy conversion efficiency, short rotating shaft, and even greater economic advantages in large-scale wind turbines, the horizontal-axis wind turbines constitute the development of wind power in the world. Mainstream models, and accounted for more than 95% of the market share. The vertical axis wind turbines developed during the same period have problems such as long shafts, low wind energy conversion efficiency, difficulty in starting, stopping, and pitching. Currently, the market share is small and the number of applications is limited, but due to its full wind direction, transmission, and power generation The machine can be placed under the wind wheel or on the ground, etc. In recent years, relevant research and development in the world have also continued and made some progress.

3. Single-machine capacity of wind turbine continues to increase In recent years, the single-machine capacity of the wind turbine in the wind power market has continued to increase. With the increase of single-machine capacity and utilization efficiency, the mainstream models in the world have been 500^-1000kW since 2000. Increased to 2-31 VM in 2009.

The mainstream models in China have increased from 600-1000kW in 2005 to 850-2000kW in 2009. In 2009, the largest wind turbine installed in China's land-based wind farms was 2MW.

In recent years, the development of offshore wind farms has further accelerated the development of large-capacity wind turbines. At the end of 2008, the largest wind turbine unit in the world has reached 6MW in capacity, and the diameter of the wind turbine has reached 127m. At present, the 8-10MW wind turbine has been designed and manufactured. The 3MW offshore wind turbine unit of Sinovel in China has been successfully put into operation at Shanghai Donghai Bridge offshore wind farm, and the 5MW offshore wind turbine has rolled off the line at the end of October 2010. At present, Huarui, Goldwind, Dongqi, Guodian United, Hunan Xiangdian, and Chongqing Haizhuang are all developing large-capacity wind turbines of 5MW or 6MW.

4. Pitch-variable power-regulation technology has been widely adopted. Because variable-pitch power control methods have the advantages of stable load control, safety, and high efficiency, they have been widely used in large wind turbines in recent years. Combining the application of variable pitch technology and the development of power electronics technology, most wind turbine generator manufacturers have begun to use variable speed constant frequency technology and have developed pitch variable speed wind turbines, which has further improved and improved wind energy conversion. In 2009, 95% of the wind turbines installed in the world were equipped with pitch transmission and the proportion was gradually increasing. The MW wind turbines installed in China in 2009 are all pitch pitchers. Most wind turbines with more than 2MW use three independent electronically controlled pitch control mechanisms, and the closed-loop control of the blades through three sets of variable speed motors and gearboxes.