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The importance of wind energy development has been indisputable for large-scale wind energy

09-02-20

The importance of wind energy development has been indisputable for large-scale wind energy development must first solve a series of key scientific questions. The importance of wind energy development has been indisputable for large-scale wind energy development must first solve a series of key scientific questions.

Deputy director of the National Climate Center, China Meteorological Administration, solar wind energy resource assessment Rayong researcher and director of the Center for Atmospheric Physics, Chinese Academy of Sciences, research fellow HU Fei in "Science Times" interview, the same emphasis on this view.

Well, actually facing the wind energy resource development and atmospheric sciences relating to what the key scientific problems?

Set up wind energy resource assessment model refinement

"It's like first prospecting of mineral resources development, the development of wind energy resources must first find out the wind, but wind energy and mineral resources, is it different, not necessarily able to have the wind on the issue of wind energy." Hu said, we must set up an effective scientific method to carry out detailed investigation of wind energy resources. These scientific methods including the improvement and development of the international wind energy resource assessment of existing theories and methods, set up in China for climate and topographical features of the wind energy resource assessment model refinement.

From the perspective of atmospheric science and wind power are near the main use of the kinetic energy of formation of stroke resources (wind turbine hub height of generally less than 120 m), Therefore, we must learn more about fans in China, a high range (120 meters below) wind energy resources are the number of total reserves, where China's wind energy resources are rich in macro-areas.

Yong introduction to the reporter, in the past, China's wind energy resource assessment used by major meteorological stations are 10 meters high on conventional wind measurement data and a small amount of wind measuring tower data, the spatial distribution of the density of meteorological stations, wind measuring tower information as well as a shorter sequence China has not yet been set up to adapt to the characteristics of monsoon climate and terrain characteristics of the refinement of theories and methods to assess factors such as constraints, can not accurately give fans high on wind energy resources, as well as the refinement of total reserves (horizontal resolution of 1 km, vertical resolution up to 10 meters; the same below) of the geographical distribution of characteristics. Therefore, in order to realize China's wind energy resources for sustainable development and utilization of large-scale, one must first learn more about China's wind power blower highly specific distribution of resources.

Rayong further stressed the need to macro-rich wind energy resources in the area of science to guide the micro-wind farm site selection, needs to be set up for the characteristics of monsoon climate in China and topographical characteristics of the micro-site model of wind farm, wind energy resources to achieve the refinement of assessment , the result can be better used in wind farm design and construction.

Wind energy resources in order to carry out the refinement of the assessment, but also for the dynamic design of wind  generators forecasting and wind power to provide technical support, also need to have wind farms and small-scale fan-scale numerical model.

"In short, our aim is to realize multi-scale wind field simulation and forecasting, which is we have to overcome one of the key technical problems." Hu said.

Extreme climate on the impact of wind energy development

"In 2003 on the 13th typhoon 'cuckoo', in 2006 on the 1st of Typhoon 'pearl' and No. 8 Typhoon 'Saomai', respectively, resulted in the Guangdong Shanwei Red Bay wind farm, wind farm and Zhejiang S.A. Cangnan Phaius serious mountain electric fan damage. "talking about extreme weather and climate on the impact of wind energy resource development, the Rayong said that before the wind farm in the design of the time, the impact of extreme weather and climate was nothing much about, such as the southeast coast of the typhoon, how strong, wind farm would result in any significant effect. Now that these problems have become wind power resources development must first resolve the key issues, in particular extreme weather or to consider the impact of meteorological disasters, such as strong storms, strong winds, strong typhoons, ice, lightning and so on.

Hu pointed out that non-equally, how the extreme weather conditions to guide the construction of wind farm layout and key areas of macro, how to scientifically assess the construction of wind farms in different regions of climate risk (mainly due to extreme weather conditions of wind damage probability) are At present, wind energy development to the important scientific questions. For example, tropical cyclones, tornadoes, explosive extratropical cyclone, low temperature, storm surges, sea ice environment, such as bad weather will seriously affect the safe operation of wind farms, of which the impact of tropical cyclones in the worst.

HU Fei, for example, at present, on the atmospheric boundary layer in high blower gas within the scope of tropical cyclone characteristics of lack of in-depth understanding, not for the coastal and offshore wind farm designed to provide reliable aerodynamic parameters, wind farm planning and construction of a lack of climate based on risk analysis.

"In the global climate change context, only in the scientific understanding of China's wind energy resources, the fact that the past changes and their causes, and possible future trends in a more accurate prediction on the basis of the Chinese wind energy resources in order to realize the great sustainable development and utilization of the scale for the wind farm layout of the macro-and micro-site to provide a scientific basis. such as, China's wind energy resources is how to change the past? the future evolution of the trend? Can sustainable use? "Hu said.

Wind resource monitoring and forecasting system

Because of the extensive use of wind energy, a growing number of wind power enterprises need accurate forecasting service. Wind power business-to-short-term forecasting of the demand for wind energy are: the need for generating capacity rather than the forecast wind speed forecasting; early release day 36 ~ 48 hours-by-time forecasting; give credibility prediction; early days of the medium-term forecasting of planning and management of the maintenance is very important.

"Today's weather and climate models are still basically on the wind farm should not measure the wind speed distribution to make precise forecasts." Hu said that to a large-scale construction of wind farms need to improve wind farm built wind power short-term forecasts.

Rayong has also pointed out that the electricity grid because of scheduling needs, wind power requires an estimate of its上网generating capacity. In this regard, China's existing wind farms are mainly based on the weather forecast with local weather conditions to carry out a number of wind power forecasting. June 2006, the China Meteorological Administration set up a wind energy resource assessment of solar energy center. The center has already begun to do some of the wind power forecasting work. "We are and the two wind farm co-operation for a number of wind power forecasting system for construction and development."

"But these are far from adequate, the current urgent need for specialized services to set up wind farm wind power wind energy resources of the Internet to deploy monitoring, forecasting system." Rayong noted. Source: Science Times

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