An input signal acquisition device and method for an independent pitch control system

Abstract

The invention discloses an input signal acquisition device of an independent variable-pitch control system. The input signal acquisition device comprises a sensor bracket which is connected with a cross rod in front of a wheel hub, and a sensor bracket which has a first distance from the wheel hub. Axial direction of the sensor bracket and the cross rod is coaxial with the rotation axial direction of the wheel hub, the sensor bracket is synchronously rotated with the cross rod in a running process of an impeller, at least a receiving-transmitting device is installed in the sensor bracket, and the at least one receiving-transmitting device and a host machine installed in a cabin of a fan together constitute a laser Doppler radar wind measurement system. The receiving-transmitting device is used for transmitting a bundle of narrow band laser pulses with stable frequency and controlling the laser pulses to point to a set measure point area in an inflow area in a set slope angle so as to obtain Doppler frequency shift data so that the host machine can calculate the average wind speed in the set measure point area according to the Doppler frequency shift data. The invention also discloses an input signal acquisition method of the independent variable-pitch control system.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to an input signal acquisition device and method for an independent pitch control system. Background technique [0002] Countries around the world have begun to pay attention to the natural environment. Under the background of promoting the development of clean energy globally, wind energy has been recognized by the global market as a renewable clean resource. The global wind power market is increasing at a rate of 20% to 35% per year. The weight of large-megawatt land-based units and offshore wind power installed in the world is expanding at a rapid rate, and the diameter of the blades of the units reaches more than 100 meters. The fatigue load during unit operation is reduced, so the wind turbine adopts an independent pitch strategy that can effectively reduce the load caused by this imbalance, and has an obvious load reduction effect. [0003] In order to achieve i...

AI Technical Summary

Problems solved by technology

[0009] Using the method of simultaneously measuring the blade root vibration and impeller azimuth as the input signal of the independent pitch controller, although the control effect of the independent pitch controller has been improved to a certain extent, it still has the above-mentioned low control accuracy and other characteristics

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