Method for detecting clearance value of blades of wind driven generator set based on 77 GHz millimeter wave radar

Abstract

The invention discloses a method for detecting the clearance value of blades of a wind driven generator set based on a 77 GHz millimeter wave radar, and relates to the technical field of new energy. According to the method, the wind driven generator set is digitized, a special coordinate system is established, the 77GHz millimeter wave radar is adopted as a core sensor, the radar with a special wave beam is installed at the bottom of the tail of a wind driven generator cabin, the FOV direction of the radar points to a fixed airspace, when the blades rotate to the area, reflected waves are subjected to data acquisition, a reflection point is formed through a radar signal processing correlation algorithm, and the blade attitude is fitted by using algorithms such as extended Kalman, curve fitting, data fusion in combination with information such as rotating speed and pitch angle; and the real-time clearance value is calculated by combining the simulation information of the set, the risk level of 'tower colliding 'of the blades is evaluated, and a final result is transmitted to a main control system in real time through a controller to finish the control of the wind driven generator.

Description

technical field [0001] The present invention relates to a method for detecting the clearance value of the blades of a wind power generator unit, in particular to a method for detecting the clearance value of the blades by installing the millimeter-wave radar as the core sensor at a specific position of the wind turbine unit to obtain the position information of the fan blades in the running state. method. Background technique [0002] In recent years, with the advancement of technology, wind power has developed rapidly as a clean energy source. Under the action of wind force, the blades of the fan unit push the power generation equipment to convert wind energy into electrical energy. During the operation of the unit, as the wind force changes (especially gusts), the deformation of the blades will also change during operation. In extreme cases Next, there is the possibility of "sweeping the tower". Realizing the real-time monitoring of the blade attitude is of great signifi...

AI Technical Summary

Problems solved by technology

[0003] At present, the common blade running status detection systems on the market mostly choose sensors such as laser rangefinders or cameras. Due to the high frequency and short wavelength characteristics of laser and visible light, they can be detected in rain, snow, fog, sandstorm and other weather or at night. The effect is poor and cannot meet the actual needs

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