Anti-resonance control method and device for wind power generator

Abstract

The invention discloses a wind power generator anti-resonance control method and device. The method comprises the following steps that the output power of a wind power generator is controlled to be reduced to a preset second power reference value in a first preset time range when the rotating speed of the wind power generator is increased to a rotating speed lower limit value corresponding to a resonance band and the output power of the wind power generator is greater than or equal to a preset first power reference value; and when the rotating speed of the wind power generator is reduced to arotating speed upper limit value corresponding to the resonance band and the output power of the wind power generator is greater than or equal to a preset third power reference value, the output powerof the wind power generator is controlled to increase to a preset fourth power reference value in a second preset time range. The wind power generator anti-resonance control method and device have the advantages that by controlling the rotating speed and the output power of the wind power generator, the wind power generator is promoted to quickly pass through the resonance band, and the resonancephenomenon is avoided.

Description

technical field [0001] The present invention relates to wind power generation, and more particularly relates to an anti-resonance control method and device for a wind power generator. Background technique [0002] Wind power generation is the process of converting wind energy into mechanical energy and then converting mechanical energy into electrical energy. During the operation of the wind turbine, the frequency of the rotor rotation is likely to be close to the natural frequency of the structural components (such as the first-order natural frequency of the tower) to generate resonance. Usually the resonance band has a wide frequency range. If the operating speed falls below the resonance In the corresponding speed range of the belt, if it lasts for tens of seconds or even several seconds, it will cause strong vibration of the whole machine, affect the performance of the unit and damage the structural components, causing serious economic losses. [0003] At present, when ...

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Problems solved by technology

However, since the rotational speed changes with the change of wind speed, the rotational speed is more likely to fall within the rotational speed range corresponding to the resonance zone, thus causing resonance

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