Wind turbine independent pitch four-quadrant operation control method
A technology for wind turbines and independent pitch adjustment, which is applied in the control of wind turbines, wind turbines, engine control, etc. It can solve problems such as unguaranteed wind speed, high speed, unsatisfactory independent pitch control technology, etc., to improve the overall Effects of power generation, load reduction, and overall manufacturing structure weight reduction
Active Publication Date: 2021-06-18
大唐可再生能源试验研究院有限公司
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The measurement of the blade root load takes time, but the blades of the wind turbine are rotating during the power generation process, and the speed is relatively high. The wind speed is an unpredictable three-dimensional three-dimensional energy source, and the wind speed at a certain position in the previous period cannot be guaranteed. The current stage is the same, so the effect of the current independent pitch control technology in the actual implementation process is not ideal
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0050] figure 1 A schematic diagram of a wind power generating set is shown, where 101 and 102 respectively mark the wind measuring position of the generating set and the highest position of the operating blade of the generating set. figure 2 A schematic diagram of the operation of the impeller is shown, where 201 indicates that the blades rotate in a clockwise direction, and D is the diameter of the impeller. image 3 A schematic diagram showing the four-quadrant operation control of wind shear taking the operation trajectory of blade A as an example
[0051] Such as Figure 4 As shown, the method includes the following steps.
[0052] 1. Determine the unified optimal pitch angle of the three blades currently pitched.
[0053] Wind shear means that when the wind blows across the ground, due to the friction of various rough elements (grass, crops, forests, buildings, etc.) on the ground, the energy of the wind is reduced and the wind speed is reduced. Decreases with incre...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A four-quadrant operation control method for independent pitching of wind turbines is proposed, which belongs to the technical field of wind power generation. The method includes: step 1, determining the uniform optimal pitch angle of the three blades currently pitching; The current wind speed determines the wind speed at the highest point and the lowest point of the diameter of the impeller, and determines the pitch angle corresponding to the wind speed at the highest point and the wind speed at the lowest point; Step 3, determines the time required for the blade to rotate 90° in the first quadrant according to the impeller speed; Step 4 , determine the real-time pitch angle of the blades in the first quadrant to the fourth quadrant according to the time; step five, determine the quadrant where each blade is located according to the impeller position sensor, and determine the blades in the first quadrant to the fourth quadrant according to step four The real-time pitch angle is controlled separately for each blade. The control method proposed in this scheme can reduce the load of the wind power generating set and obtain more power generation at the same time.
Description
technical field [0001] The patent of the present invention belongs to the technical field of wind power generation, and in particular relates to a four-quadrant operation control method for independent pitching of wind power generating sets. Background technique [0002] Wind energy is an inexhaustible green and clean energy that has developed very rapidly in recent years. The single unit capacity of modern wind turbines is increasing, and the diameter of the impeller is also increasing. The diameter of the impeller of the latest developed model is greater than 120 meters. With the increase of wind turbine unit capacity and the maturity of wind energy technology, the current research focus on large wind turbines is to reduce manufacturing and operating costs. It is an effective way to reduce the cost of wind turbines by reducing the load of each key component of the wind turbine to reduce the weight of these key components, improve the reliability of the equipment and prolo...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/02
CPCF03D7/0224F05B2270/328Y02E10/72
Inventor 赵重阳苗继春吴立东高伟程学文李致尧张舒翔刘洋广
Owner 大唐可再生能源试验研究院有限公司