Yaw control method of a wind turbine

Abstract

The invention belongs to the technical field of wind power generation, and particularly relates to a yaw control method for a wind generating set. The yaw control method for the wind generating set comprises the following steps that different wind direction judgment modules are selected according to the period T (T=T0+T1), the contrastive analysis is conducted on the yaw frequency N# counted in different wind direction sections, and the yaw error angle delta theta is dynamically given in combination with the wind speed judgment section, and effective unit yaw control is achieved. The yaw control method has the beneficial effects that on the basis of existing yaw hardware equipment, the time lag control over a unit yaw wind countering system can be achieved; especially when wind direction fluctuation is little, the yaw wind countering angle is increased by dynamically giving the yaw error angle under the weak wind condition, the work frequency of the yaw system under weak wind is reduced, and the auxiliary power supply of the unit is reduced; and similarly, the yaw wind countering angle is reduced by dynamically giving the yaw error angle under the heavy wind condition, the yaw wind countering capability is improved, more wind energy is captured, and the power generating amount of the unit is increased.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a yaw control method of a wind power generating set. Background technique [0002] The impeller device of the wind turbine can realize the effective capture of wind energy, and the prerequisite for the impeller to effectively capture wind energy is the efficient wind-facing of the yaw system, so the yaw system of the unit plays a vital role in the power generation performance of the wind turbine. The research and control of the current crew on the yaw system mainly focuses on the protection of the yaw system itself, the wind of the yaw system, the load reduction of the yaw system, and the wind field level control of the yaw system. The main technical means and methods for yaw control include: developing new control algorithms; adopting new wind measuring and wind-facing devices; adopting new yaw rate adjustment devices; adopting new control methods; com...

AI Technical Summary

Problems solved by technology

This method mainly judges the wind speed range to give the yaw frequency converter to implement different yaw rates. The disadvantage is that the frequency converter is added, which increases the cost of the yaw system; the second is that the wind direction is not considered as the determination condition of the yaw system

However, due to the adoption of new equipment, the overall cost of the unit has increased

The relevant yaw control methods involved in the above patents either increase the cost of the whole machine, or have deficiencies in the control methods, so it is best to have a yaw control method that achieves compatibility between the two

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