Wind turbine generator set clearance control method based on airborne laser wind finding radar

Abstract

The invention discloses a wind turbine generator set clearance control method based on an airborne laser wind finding radar. The method comprises the following steps: S1, calculating real-time vertical wind shear VShear; S2, calculating the equivalent wind speed change rate CR_RAWS of a wind wheel surface; and S3, according to the real-time vertical wind shear VShear and the equivalent wind speed change rate CR_RAWS of the wind wheel surface, dividing and shutting down clearance control areas, and performing corresponding clearance control on the different clearance control areas. According to the method, the clearance areas of the wind turbine generator set are accurately divided according to the real-time vertical wind shear VShear and the wind wheel surface equivalent wind speed change rate CR_RAWS, different clearance control strategies are adopted for the different clearance areas, a large amount of loss, caused by clearance control, of generating capacity is avoided to the maximum extent, meanwhile, the clearance range of the blades in the operation process of the generator set is ensured, the condition that the blades sweep a tower is avoided, and the operation safety of the generator set is improved.

Description

technical field [0001] The invention relates to the technical field of control of wind power generators, in particular to a method for controlling the headroom of wind power generators based on an airborne laser wind measuring radar. Background technique [0002] With the rapid development of my country's energy transformation and wind power generation technology, the development of complex wind resource areas such as low wind speed and high turbulence is proceeding rapidly; in order to improve the economy of the whole field, a large number of long blade units are used in such wind fields . Such wind resource areas are more prone to negative wind shear conditions, characterized by a gradual decrease in wind speed as the vertical height increases. Strong negative wind shear not only significantly increases the unbalanced load on the wind rotor surface, but also increases the equivalent fatigue load of the main shaft and the gearbox; at the same time, it is more likely to caus...

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Problems solved by technology

[0003] The present invention mainly solves the technical problem that the existing headroom control method will cause a large loss of power generation of the wind turbine while ensuring the clearance range of the blades during the operation of the wind turbine; The wind radar's wind turbine headroom control method adopts different headroom control strategies for different headroom areas, which avoids a large loss of power generation due to headroom control to the greatest extent, and at the same time ensures the headroom of the blades during the operation of the generator set. There will be no blade sweeping of the tower, which improves the safety of the unit operation

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