A novel power curve knee angle optimization method for wind farms
A technology of power curve and motor field, which is applied in the control of wind turbines, wind power generation, wind turbines, etc., to achieve the effect of solving time-consuming problems
Active Publication Date: 2022-07-08
新天绿色能源股份有限公司 +1
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[0004] Aiming at the deficiencies of the prior art, the present invention provides a novel power curve knee pitch angle optimization method for wind farms, which overcomes the deficiencies of the prior art and has the advantages of short time consumption and more accurate optimal pitch angle curves , smooth and other advantages, can effectively solve the shortcomings of traditional strategies
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[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be described clearly and completely below with reference to the accompanying drawings in the present invention.
[0021] In traditional wind turbines, the knee of the power curve includes the "generator rated speed section" and the "full power section". In the two control stages, "pitch angle-generating speed closed-loop control" is generally used, such as PID algorithm or PI algorithm. With this main control logic, there are generally the following rules:
[0022] 1. When the generator speed exceeds the rated speed threshold, the pitch angle rises;
[0023] 2. The rise of the pitch angle will cause changes in the wind energy capture of the wind rotor;
[0024] 3. The real-time capture of wind energy increases, and the "rate of change of generator speed" increases (raise the paddle, wind energy capture increases); ...
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A novel power curve knee pitch angle optimization method for wind turbines, comprising the following steps: collecting millisecond-level operation data of the turbine; screening out the negative value of the generator rotation rate; screening out the power generation at the intersection of each wind speed and pitch angle The positive value of the engine speed should meet the data of more than 100 or more than 4 seconds; the average value of the positive value of the generator speed change rate within the Bin point range of the intersection of each wind speed and pitch angle is counted. Draw three-dimensional graphs of wind speed, pitch angle and generator rotation rate; filter the peak value of generator rotation rate; fit a curve through the peak value of generator rotation rate, adjust the curve fitting type to make the fitting curve smooth, and the curve is perpendicular to the generator rotation. Velocity contours. The invention overcomes the deficiencies of the prior art, has the advantages of short time consumption, more accurate and smooth optimal pitch angle curve, etc., and can effectively solve the shortcomings of the traditional strategy.
Description
technical field [0001] The invention relates to the technical field of pitch angle optimization in wind power airports, in particular to a novel power curve knee pitch angle optimization method for wind power airports. Background technique [0002] With the vigorous development of the domestic wind power market in the past ten years, there are a large number of wind turbines with short rotor diameters in low wind speed areas. Some wind power owners have adopted the method of lengthening the blades to improve the power generation efficiency of low wind speed wind farms. Among them, the old wind turbines have the characteristics of blade surface wear, dirt, and airfoil data changes caused by the partial blade lengthening scheme. Finally, there is a deviation between the actual airfoil data of the blade and the theoretical airfoil data, and the pitch angle optimization strategy of the unit needs to be optimized through the measured data. [0003] The traditional pitch angle o...
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IPC IPC(8): F03D7/04
CPCF03D7/043Y02E10/72
Inventor 曹欣谭建鑫卢鲜亮刘世江谢丹赵志磊谷海昌姜鸿帅刘丰硕李永新黄鑫傅杰敏褚军涛张腾飞
Owner 新天绿色能源股份有限公司