Wind power equipment operating reliability is valued

I. Industrial Scale and Market Structure

In 2011, a total of 29 wind power plant suppliers in China, compared with 43 in 2009 and 38 in 2010, the number of total supplier suppliers showed a downward trend, which was basically the same as the number of 30 suppliers in 2008. It should be noted that the use of "supplier" here is to distinguish it from "manufacturer". “Supplier” refers to a wind power machine manufacturing company that sold/installed more than one sample machine in the market. There are still more than 70 "wind turbines" registered manufacturers in China, but they do not contribute to the market every year. Among the newly installed wind power generation in China in 2011, the top five manufacturers in the market were 3,600 MW (20.4%) of Goldwind Technologies, 229,9MW (1,7%) of Sinovel, and 2,847MW (16,1%) of United Power. Guangdong Mingyang 1 177.5MW (6.7%) and Dongqi 946MW (5.4%); As of 2011, the top five companies in China's cumulative wind power installation market are Huarui Wind Power 12 977MW (20.8%) and Goldwind 12 678.9MW (20.3%), Dongfang Automobile 6898MW (11.1%), United Power 5 282MW (8.5%) and Vestas 3 565.5MW (5.7%).

From the analysis of installed data, the total market share of 15 suppliers before 2011 accounted for 93.20%, a decrease of 1.33% compared with 94.53% in 2010; the total market share of the top ten suppliers in 2011 accounted for 83.18%, compared with 2010. The year's 87.25% fell by 4.07%; in 2011, the total market share of the top five suppliers accounted for 65.3%, a decrease of 5.7% from 71% in 2010.

Based on the above analysis, the following conclusions can be drawn: First, despite the large number of manufacturing enterprises in China that have obtained the production capacity of wind turbines, there is a downward trend in market competition; second, in the market competition in the past two years, the ranking is behind. Some companies have gained more in market games. Among the top 15 companies in 2011, the installed capacity of 10 companies including United Power, Mingyang Wind Power, Xiangdian Wind Power and Shanghai Electric increased in different degrees in 2011, while Huarui, Goldwind, Dongqi, Vestas The installed capacity of the five companies in Gemeyi was lower than that in 2010. Guodian United Power Technology Co., Ltd. installed an installed capacity of 2,847 MW in 2011, an increase of 73.0% over 2010, making it the most eye-catching company in 2011. The first batch of 1.5MW wind turbine units of Guodian United Power Technology Co., Ltd. was put on the market in 2008 and installed 768MW in 2009, ranking fourth in the Chinese market. In 2010, the installed capacity of 1 643MW still ranked fourth, and in 2011 it took advantage. The top three. In addition, Guodian United Power Technology Co., Ltd. is also very rapid in the research and development of new products. The 3MW units it developed have already gone offline in 2010. In December 2011, United Power 6MW wind turbines went offline at the Lianyungang manufacturing base in Jiangsu. Only a difference of six months between the production line of Huarui 6MW wind turbines.

Another company that deserves attention is the CSR Zhuzhou Electric Locomotive Research Institute. This company has maintained a steady growth since the installation of the first 1.65MW unit in 2008. In 2011, the 451MW installed capacity in Zhuzhou entered the top ten for the first time, and is also regarded as a rising star. In the research and development of new products, the Zhuzhou Institute is not behind. The 2.5MW unit it has developed has been installed with prototypes, and the 5MW unit has also been under development.

Both Goldwind and Huarui have reduced their installed capacity compared to 2010, but they still maintained the first and second positions in the Chinese market in 2011 respectively. In addition, Goldwind and Sinovel's performance in new product development and international market expansion is also remarkable. Goldwind, Sinovel, United Power and Mingyang are among the world's top ten manufacturers in 2011.

The foreign-funded enterprises' business in China has been greatly impacted by domestic enterprises in the past two years. The main reason is that in recent years China's domestic wind power equipment has formed a volume supply capacity, and the market price has been decreasing year after year. When the landlord bids, the foreign-funded products are disadvantaged because of the high prices. However, foreign-funded products are still more trusted by the market in terms of reliability and so on. This is also the main reason why multinational companies such as Vestas and Gomez have large markets all over the world. China's early wind power market was lack of competition due to insufficient supply of equipment. In the past few years, as a large number of domestic companies put their products on the market, market competition suddenly broke out, and price warfare became an important means. With the return of rational competition in the market, core values ​​such as product quality and after-sales services will surely be re-emphasized by the market. The competition between domestic and foreign companies will also return to the same starting line. It is expected that both domestic and foreign companies will have a very good market performance, jointly promote the progress of wind power technology, and ensure a steady and healthy development of the wind power industry.

In 2011, China installed 11,409 new wind turbines with an average power of 1,545.4 kW, which continued to increase compared with 2010. In the newly added wind power installation in 2010, the power of 1.5MW models still maintains an absolute advantage, accounting for 74.1% of the newly installed capacity, the power of 2MW models accounted for 14.7%, 2.5MW more than the units accounted for 3.5%, other Such as 1MW, 1.25MW, 1.6MW, 1.65MW, 2.1MW, 2.3MW models cumulative accounted for 5.3%, while the power of less than 1MW of wind turbines accounted for only 2.4%. From the perspective of the technical characteristics of wind turbines, pitch-shifting wind turbines with gearboxes and double-fed generators are more mature because of their relatively mature technology, and they have more supply in the market; there are no gearboxes, synchronous generators and Direct-drive wind turbines with full power converters are receiving more attention, and more companies are involved in the R&D, design, and manufacturing of these units.

It is worth noting that in recent years, due to the gradual maturity of full power conversion technology, full power converter applications have gradually increased, and are no longer limited to direct-drive wind turbines. The use of synchronous generators, full-power converters, and gearboxes with gearboxes (or gearboxes with first-order gearboxes) can be applied flexibly in wind turbines of 100- and multi-megawatts.

China's wind power component supply has basically met the market demand since 2008. These parts and components companies include both domestic and foreign companies. Among them, there are the largest number of wind-powered blade companies, which do not contain the self-made blade factories of complete machine companies. At one time, there were more than 30 blade production enterprises. However, some of these blade companies have never been put into production in batches, and some have clearly expressed their withdrawal from the market. At present, several independent blade manufacturers with relatively large market shares are still China National Composites Corporation, Sinoma Group, AVIC Huiteng, and LM. The market structure of gearboxes, generators and other parts manufacturing companies has not changed significantly. It is worth noting that the products with the lowest localization rate, such as spindle bearings, gearbox bearings and converters, have entered the mass production stage of domestic production.

As mentioned above, the current trend of self-produced parts and components of complete machine manufacturers in China is relatively obvious. Enterprises that specialize in the development of wind power components are, on the whole, being squeezed by these complete machine companies against their market space.

Wind turbines manufacture their own parts and components, mainly to ensure market supply, ensure product quality, and ensure the lowest cost. In the current situation of increasingly perfect wind power supply components, as a company specializing in the production of wind power components, it is necessary to maintain advantages in R&D and innovation, quality control, cost control, etc., on the premise of satisfying the above-mentioned requirements of the entire machine enterprise. Win more markets.

II. Characteristics and Trends of Development 1. The operational reliability of wind power equipment has become more and more important

In November 2011, the National Energy Administration issued the “Circular on Strengthening Requirements for Wind Farm Safety Management” to require wind farm owners to strengthen wind farm quality and safety management and timely report wind power equipment quality problems; request wind power equipment manufacturers to strengthen the process Control and quality management, continuously improve the reliability and technical level of the unit; entrusted the wind energy special committee to regularly carry out quality research on the operating wind turbines, and publish the survey results and quality evaluation results to the public or typical accidents discovered. It is necessary to publish corresponding counter-accident measures and industry early warning information.

In addition, during the 2011 Beijing International Wind Energy Conference, China Wind Energy Professional Committee, Vestas Corporation and industry experts jointly researched and prepared the “China Wind Power Evaluation System Research Report”, the National Development and Reform Commission Energy Research Institute and International Energy. The “China Wind Power Development Roadmap 2050” co-published by the agency and other agencies has held conferences. These research reports, combined with foreign development experience, have a high reference value for solving wind power equipment quality evaluation, wind power equipment operation and management, wind turbine technology development trends and other issues. Government departments, industry associations, research institutes and industry have all placed the wind power industry on a healthy and stable development. It is important to promote the operational reliability of wind power equipment in different ways. Under the guidance of government departments, as the industry continues to mature, a more healthy, orderly and sustainable development of the wind power industry chain is about to take shape.

2. The wind power technology R&D system based on enterprises is increasingly perfect

In 2010, the Ministry of Science and Technology and the National Energy Administration successively established a number of R&D centers and key laboratories in the wind energy industry, relying on major domestic research institutions and leading companies to conduct basic research and promote technological progress.

In November 2011, the National Energy Administration also awarded the “National Key Laboratory for Energy Wind Energy Solar Energy Simulation and Testing and Certification”. The supporting unit is the Beijing Jian Heng Certification Center. This indicates that China's wind energy and solar energy industry has a public technology service platform integrating technical standards research, testing and certification technology research and testing and certification practices, and will accelerate the progress of the technological progress and internationalization of China's wind energy and solar energy industry.

Jian Heng Certification Center is a scientific research and technical service organization specializing in the detection and certification of renewable energy products such as wind energy and solar energy. It has a leading technology testing and certification team in the field of wind energy and solar energy, and has established a blade testing center in Baoding, as shown in Figure 3- 4. The establishment of the National Key Laboratory of Energy Wind Energy Solar Energy Simulation and Testing and Certification will further enhance China's capabilities in wind energy and solar energy testing and certification.