1.2MW Variable Speed ​​Constant Frequency Direct Drive Wind Turbine Technology
The large-scale application of modern wind turbine generator technology in China Water Resources 2003.9B began with the maturity and improvement of stall-type wind turbine technology. In the late 1970s, the three-bladed, upwind, and wind turbines with stalls regulated by the wind turbine developed by Denmark emerged from many types of wind turbines and gradually evolved into dominant models. However, with the ever-increasing single machine capacity of wind turbines, variable-speed constant-frequency pitch wind turbines have gradually occupied a dominant position. In recent years, foreign countries have begun to develop and develop direct-drive wind turbines. The generator set uses a multi-stage synchronous permanent magnet motor and the impeller is directly connected to drive. This eliminates the need for a traditional gearbox component, plus many advantages. In the future wind turbine market has great potential for development. In the middle of the year, China’s wind power generation and its technology relied on imported wind turbines for a long period of time. The high equipment prices and long-distance international transportation have caused severe impact on the development of China’s wind power industry. This reality is inconsistent with the country’s requirement to further reduce the price of electricity. In addition, the problems of inadaptability of imported equipment and failure to replace large numbers of damaged components in time in China's climate conditions have hindered the healthy development of China's wind power industry. Therefore, the development of localized wind power generation equipment with Chinese characteristics is imminent. In the recent 10 years, the wind power industry has developed rapidly. On the one hand, it encourages businesses to develop and develop new wind turbines to meet the needs of the wind power market with diversified varieties. On the other hand, in the competition between wind power and traditional electric power, economic factors become more and more important. Has become the primary factor. Therefore, an inevitable trend is the large-scale single-capacity capacity, which reduces the cost of equipment while reducing the cost of wind power construction. In the past 10 years, the stand-alone capacity of mainstream models of wind power equipment has had great potential for harnessing wind energy in China. However, China has a vast territory, and geographical and climatic conditions vary greatly. The demand for wind turbines in the domestic market is diversified, only existing ones. Domestic 600kW units and 750kW units are difficult to meet the current market demand for wind power, and it is urgent to develop new models to form a large wind turbine product line. In recent years, foreign countries have begun to develop direct-drive wind turbines. This wind turbine uses a multi-stage synchronous permanent magnet motor and the impeller is directly connected to drive, thus eliminating the traditional gearbox components. It has many advantages, and there is great room for development in the future development of wind turbines. Through the development of 1.2MW variable speed constant frequency direct drive wind turbines, we can further improve our country's ability to independently develop wind turbines, improve the overall design capability and manufacturing level of large wind turbines, and at the same time drive the development of related industries, including design. The development and technological advancement of related industries such as consulting, parts and components manufacturing, testing and certification, and professional services have created new industries and employment opportunities and helped some machinery processing companies to get out of difficulties. The development of 1.2MW variable-speed constant-frequency direct-drive wind turbines is also of great significance for the large-scale development and utilization of wind energy in China and the promotion of the development of the wind power industry. With China's accession to the WTO, the new economic environment, only the continuous introduction of new products to meet market demand, and actively participate in competition, it is possible to occupy a place in the international and domestic wind power market. The development and application of large-scale wind turbine technology in China lags behind developed countries in Europe and America. During the “8th Five-Year Plan†period of the “Eighth Five-Year Plan†period, China listed wind energy applications as a national key scientific and technological research project, and organized a number of scientific research units to tackle problems and achieved certain achievements. Currently, 200kW, 600kW and 750kW wind turbines have been successfully developed. , And put into mass production.At the same time, China Aerodynamics Research and Development Center and other units successfully developed the wind turbine design calculation software package, and applied to the "95" research project, which created conditions for China to further develop new models. In the wind turbine R&D, the development of the Ministry of Water Resources*48 “project 600kW domestic fan†has been fully completed and entered the sales stage of the fan market. More than 120 600kW wind turbines have been produced and sold, and the localization rate is as high as 960. More than 150 lower than similar foreign products, the domestic market share of 500 or more. In recent years, the relying units have carried out a great deal of work in terms of technical capacity building, basic conditions construction, technological development, product improvement, and promotion of international wind power technology exchanges, and have obtained a number of scientific research and engineering technology achievements with independent intellectual property rights. The development of domestic wind power industrialization and marketization has played a positive role in promoting. While completing the scientific and technological research projects, domestic scientific research institutions have successfully realized the industrialization of scientific and technological achievements. Since the production of domestic wind turbines in 1997, the localization rate of Goldwind S43/600 has reached more than 900, and 139 contracts have been signed. The contract amount has exceeded 350 million yuan, breaking the dominance of imported products at one stroke. The situation occupies more than 500 in the domestic market. At the same time, many outstanding domestic companies have actively developed joint development of domestically-made wind turbine parts and improved and improved product performance. The five major key components of domestic wind turbines, such as blades, gearboxes, generators, yaw systems, and electronic control systems, have all been successful, laying a good foundation for the implementation of industrialization of wind turbines. In the field of electronic control technology of wind turbines, the Institute of Electrical Engineering of the Chinese Academy of Sciences, Xinjiang University, and Goldwind Science and Technology Co., Ltd. have achieved successful experience in the control of stalled wind turbines. The development and development of electronic control systems (4PCs and PLCs) with independent intellectual property rights (IPRs) have passed practical tests and created favorable conditions for the development of larger-capacity wind power electronic control systems in the future. In the manufacture of key components for wind turbines, speed increasing boxes and generators have also been successfully domesticated. In foreign countries, pitting, micro pitting, and other abnormalities in thousands of large-scale wind turbine gearboxes have become more serious problems. During the development of the 600kW wind turbine during the Ninth Five-Year Plan period, China adopted a variety of measures to strengthen the domestic gearbox and received good results. The direct-drive wind turbine used in this project did not have a high failure rate component such as a gearbox. More safe and reliable. The design and performance calculation of large-scale wind turbine blades has mature methods and tools in the country, and the technical strength is relatively strong. It can complete the aerodynamic shape and structure design, performance calculation, load calculation and aerodynamic stability calculation of the blade. However, the development of the blades, especially the bulk manufacturing capacity, needs to be improved and an independent research project is required to support it. Huiteng Company (Continued on page 49 of China Water 2000. 3B, a powerful tool for 3D visualization analysis. It surpasses simple 3D display or creates a simple fly-through. It can also record GPS in the field or in the air. The coordinates are used as a flight path and then played back to the room. It allows you to interact with real world coordinates and projections in a real virtual geographic information environment. It can enhance or query the pixel values ​​of images superimposed on the three-dimensional surface and related Attributes can also visualize, stylize, and query the attribute information of the map vector layer. It offers a variety of dynamic viewing features that make up a true 3D landscape, not just 2.5D. Flood inundation assessments, visibility analysis between different stations, and line-of-sight analysis can also be performed. The 3D model can be simulated directly by quickly setting the fog concentration, solar altitude, and water ripple, especially the vector data along the point/line/area ArcCoverage. The flight of the route. You can query vector data and attributes and set image textures for vector data buildings to efficiently and quickly create a true virtual 3D real world, which can be widely used in military, telecommunication, digital city, garden/landscape planning and design, forest planning and Fire protection, ore prospecting and three-dimensional mapping and other fields. The OrthoBase module based on the system is used for correcting the orthorectification of regional network images. It can quickly correct tens or hundreds of images and improve the production efficiency. The images can be aerial images, digital cameras, cameras, SPOT, IOONOS, puickbird images or Other formats are available, and it has many features compared to other similar products: the templated processing flow constantly reminds the user to add missing operations. The convenient window management function enables the user to preview, browse, and zoom in the window, conveniently and quickly select the control point, and easily perform the conversion between the corrected image and the image. Six kinds of automatic connection point search strategies are provided to provide high-precision connection points. Provides SCBA and 4 AP models to reduce system errors. Look at the position of the control point and the connection point in the image. You can view it in both graphics and images. The final output image format is rich. With all the features of batch orthorectification in one. Save time, effort, and apply to large-scale data processing. OrthoBASEPro is based on OrthoBASE and adds the ability to automatically and automatically extract elevation information. It can output various DEM formats, such as TN, 3D Shapefile, ASC text, and precision inspection functions. StereoAnalyst is used to extract DEM and 2D/3D features. It is easy to use, it can obtain satisfactory results without the need of photogrammetry experts. It can also extract 3D feature models with image texture directly in Virtual GIS. Used in 3D visualization analysis module. The sub-pixel classifier of the system's sub-pixel classifier ERDASIMAGINE system can use the unique algorithm to achieve the use of spectral classification to achieve a feature with a maximum sub-pixel level of more than 20 U in the sub-pixel level. Although the technology is unique, its application is very convenient. Wizard-style operation is used from beginning to end. No matter how proficient the operation of the application personnel is, the ideal result can be obtained. Since the sub-pixel classification has the function of automatically performing atmospheric correction, the characteristic information of the substance of interest can be applied not only in the image from which this information is extracted but also other images of different dates and positions. It is more advantageous for many applications to obtain training samples of sufficiently interested substances that are not easy. The versatility of the sub-pixel classification feature information makes it possible to develop an information library that is convenient for all user applications. Sub-pixel classification can be used for routine observation, dynamic monitoring and water quality detection, and has great market potential in military and other applications. Because of its all-weather and unique image characteristics, radar data imaging radar images are increasingly used by remote sensing applications and play an increasingly important role. ERDASMAGINE has developed RadarMapping Suite, a powerful radar image processing tool to meet this demand. In addition to the basic processing functions, there are Radar orthorectification, stereo SAR generation DEM, and interferometric SAR generation. Unit: ESRI China Co., Ltd., Remote Sensing Division) Continued on page 45) Over the national Ninth Five-Year Plan "The scientific and technological achievements of the 600kW blade industrial production, has promoted the process of domestic industrialization. Currently in large-scale blade design , process manufacturing, testing, product after-sales service and other aspects have accumulated valuable experience. Pneumatic efficiency and safety of wind turbines Tsinghua University has done research on the application of foundations at international level, such as research on the aerodynamic stability analysis of wind turbine blades and technology for increasing lifespan, and was invited to the European Union indEngineer-ing magazine. Published a series of papers, and invited the author and published photos to introduce the work of the research team. Relevant departments and scholars from Britain, Australia, India, Cuba, Pakistan and other countries require exchanges and cooperation. The developed wind turbine aerodynamic characteristics analysis software was evaluated by the U.S. Department of Energy's National Laboratory for Renewable Energy (NREL) as 'better than its existing related commercial application software'. The new mechanism of aerodynamic efficiency in wind turbine blades has recently been Great progress has been made in the new theory of vibratory life extension. According to the level of domestic manufacturing industry and the experience gained during the 9th Five-Year Plan period, we must select a company with strength, high management level, and product quality. The quality of domestically produced parts and components can be guaranteed. In short, the existing domestic technology and conditions have the ability to develop variable-speed constant-frequency direct-drive wind turbines. The research and application of key technologies also require further input to improve scientific research and product levels. For a few domestic issues and parts that cannot be solved for the time being, we can continue to introduce technology or products from abroad in order to speed up the development and production of domestic wind turbines, and achieve domestic and international technological integration. ! Author: Xinjiang Goldwind Technology Co., Ltd.) China Water Resources 2003.9B Here you can find the related products in Ultrasonic Flow Meter, we are professional manufacturer of Ultrasonic Flow Meter,Portable Flow Meter,Portable Ultrasonic Flow Meter,Ultrasonic Flow Measurement. We focused on international export product development, production and sales. 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