Pneumatic imbalance correction method, device and equipment for blades of wind generating set

Abstract

The invention discloses pneumatic imbalance correction method, device and equipment for blades of a wind generating set. The method comprises the steps of acquiring waving direction bending moment values of root parts of the three blades of the wind generating set acquired through a load sensor; calculating a deviation value between each waving direction bending moment value and a datum load; according to the deviation values, calculating a correction pitch angle corresponding to each blade; and adding each correction pitch angle and a target control pitch angle of each corresponding blade, and carrying out pitch control on the wind generating set. According to the pneumatic imbalance correction method, the device and the equipment for the blades of the wind generating set provided by the invention, by utilizing blade root load measurement, the pitch angles of the blades are online corrected, and the pneumatic imbalance of the blades is reduced, so that the pneumatic imbalance of the blades and the influences brought to unit operation safety and generating efficiency due to the conditions such as blade processing accuracy, installation accuracy and blade surface contamination are reduced, and the wind generating set can stably and high-efficiently run.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method, device and equipment for correcting blade aerodynamic imbalance of a wind power generating set. Background technique [0002] At this stage, large-scale commercially operated wind turbines at home and abroad usually adopt the structure of upwind direction, horizontal axis, and 3 blades. The wind rotor composed of 3 blades absorbs wind energy and converts it into electrical energy. Blades are the most front-end components for absorbing wind energy, and their performance directly affects the power generation performance and stability of the whole machine. Affected by blade processing accuracy, installation accuracy, and blade surface contamination, the three blades are prone to aerodynamic imbalance during the operation of the unit, which directly leads to unbalanced load on the wind rotor, low power generation efficiency, and induces wind turbines to vibrat...

AI Technical Summary

Problems solved by technology

These methods can analyze the unbalanced impeller more accurately, but how to improve the unbalanced impeller is caused by which blade or blades, how much is affected by each, how to independently adjust the three blades, and how much adjustment can be made. There is no mention of reducing the aerodynamic imbalance of the wind rotor (blade) to an acceptable range

[0004] Therefore, how to reduce the aerodynamic imbalance of the blades, thereby reducing the aerodynamic imbalance of the blades caused by blade machining accuracy, installation accuracy, and blade surface contamination, etc., and the impact on the operating safety and power generation efficiency of the unit, so that the wind turbine can be Stable and efficient operation is an urgent problem to be solved today

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