A method, device and system for calibrating the pitch angle of a wind power generating set
A technology of wind power generators and wind power generators, which is applied in the direction of wind power generators, wind power motor control, wind power generation, etc., can solve the problems of inaccurate blade angle measurement and low angle calculation accuracy, and solve the problems of inaccurate blade angle measurement, wind power generation, etc. Improve operating efficiency and stability, and solve the effect of low angle calculation accuracy
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Embodiment 1
[0045] figure 1 It is a flow chart of the method for calibrating the pitch angle of the wind power generating set described in this embodiment, as shown in figure 1 As shown, the wind turbine pitch angle calibration method described in this embodiment includes:
[0046] Step S101, determine the position of the reference angle, rotate the pitch bearing counterclockwise from the position of the reference angle to a preset first angle, clear the absolute encoder, and rotate the pitch bearing clockwise to the reference angle angle.
[0047] Since the blades and bearings rotate around the axis, there is no unified marking method for the specific angular position of their rotation. In order to provide a reference for subsequent operations, before calibration, a reference angle needs to be determined as a reference for subsequent operations. Reference location. Exemplarily, in this embodiment, the position of the reference angle is set to coincide with the 0 degree of the hub, and...
Embodiment 2
[0060] figure 2 It is a schematic diagram of the pitch bearing and related encoder of the wind power generating set described in the second embodiment of the present invention. Such as figure 2 As shown, where: the absolute encoder has a rotating gear and the gear meshes with the pitch bearing, and the incremental encoder is connected to the non-drive shaft of the pitch motor. When calibrating, first rotate the pitch bearing connected to the blade counterclockwise to about -15° position (the impact block 5 on the pitch bearing exceeds the distance of 3 teeth of the -10° limit switch 3). Clear absolute encoder 1 to zero. Next, the pitch bearing connected to the blade rotates clockwise to the 0° position, that is, the 0° position of the bearing coincides with the 0° position of the hub, and the current value of the absolute encoder at this time is calibrated to the 0° position. Then, continue to rotate clockwise to the 90° position, that is, the bumper 5 is in contact with ...
Embodiment 3
[0064] image 3 It is a structural block diagram of the pitch angle calibration device of the wind power generating set described in this embodiment, as image 3 As shown, the wind turbine pitch angle calibration device described in this embodiment includes:
[0065] The reset unit 310 is used to determine the position of the reference angle, rotate the pitch bearing counterclockwise from the position of the reference angle to a preset first angle, reset the absolute encoder, and rotate the pitch bearing clockwise to said reference angle;
[0066] A current calibration unit 320, configured to obtain a first current value when the absolute encoder is at the reference angle, and use the first current value to calibrate the preset first angle of the incremental encoder;
[0067] The angle calibration unit 330 is configured to rotate the pitch bearing clockwise to a preset second angle, acquire a second current value when the absolute encoder is at the preset second angle, and u...
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