Wind generation set single blade clamping fault oar lay-in method

Abstract

The invention provides a wind generation set single blade clamping fault oar lay-in method. The method comprises the following steps that 1, whether a single blade clamping fault occurs on a wind generation set or not is judged; 2, when it is judged that the single blade clamping fault occurs on the wind generation set, the yam bearing load is calculated in advance according to the preset constantvariable-pitch speed; and 3, when the yam bearing load calculated in advance is smaller than the preset load threshold value 1, the preset constant variable-pitch speed is adopted for achieving the oar lay-in action of the wind generation set; and when the yam bearing load calculated in advance reaches the preset load threshold value 1, the non-constant variable-pitch speed is adopted for achieving the oar lay-in action of the wind generation set, wherein the non-constant variable-pitch speed is inversely related to the real-time yam bearing load. When the single blade clamping fault occurs on the wind generation set, and the oar lay-in method is adopted for achieving the oar lay-in action, the yam bearing load of the wind generation set is small, and a yam system is low in cost and highin operability.

Description

technical field [0001] The invention relates to the technical field of control of wind turbines, in particular to a method for retracting a single blade of a wind turbine due to stuck faults. Background technique [0002] With the continuous increase in the number of wind turbines assembled, the capacity of a single unit, and the diameter of the wind rotor, higher requirements are placed on the adaptability and reliability of wind turbines. With the refinement of control development, the wind turbine can be controlled more finely through the control strategy to reduce the operating load of the wind turbine. Wind turbines are likely to generate extreme loads when they are triggered by faults. Therefore, there are a large number of fault conditions in the GL codes, IEC codes, and national standard codes for wind turbine design. [0003] In the actual operation of the fan, there is a single-blade pitch stuck fault, which is also a fault required in the design specification. T...

AI Technical Summary

Problems solved by technology

However, with the increase of the capacity of the unit and the diameter of the blade wheel, the load of the unit is also increasing, especially under this condition, if the existing constant rate shutdown strategy is used, the extreme load under this condition can be very noticeable, especially the load at the yaw bearing, resulting in higher cost of the yaw system

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