A control method for a wind turbine yaw system

Abstract

The invention discloses a method for controlling a yaw system of a wind turbine. Starting constraint conditions are established based on a full life cycle cost theory and by comparing yaw comprehensive cost and predicting the unit capacity after yaw to judge yaw maneuver under different working conditions, the contradiction between the wind turbine capacity and the losses of the yaw maneuver is eliminated, the service life of a yaw system is prolonged, and the maximization of the comprehensive benefit of the full life cycle of the wind turbine is achieved. According to the method, the wind speed, the wind direction changing rate, the wind direction changing angles and other factors are taken into consideration comprehensively, and scientific judgment is carried out on whether the yaw maneuver is necessary or not from the point of view of the economic optimality of the full life cycle when threshold value control requirements are met by predicting the increased capacity after yaw and combining cost analysis of the yaw maneuver.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a control method for a yaw system of a wind power generator. Background technique [0002] As the problem of energy shortage intensifies, wind energy, as a new type of energy, is becoming the fastest growing green energy due to its advantages of being renewable, widely distributed, green and non-polluting. As a unique servo system of large-scale wind turbines, yaw system is an important part of wind turbines. Its operating performance directly determines the overall performance of wind turbines, wind farm power generation efficiency, and wind energy utilization efficiency. [0003] As a product of nature, wind energy has the characteristics of randomness and intermittentness, and its direction changes all the time. During the operation of wind power generation, the yaw system needs to be started frequently to keep the wind rotor in the windward state as ...

AI Technical Summary

Problems solved by technology

However, problems such as gyro torque will occur during the yaw process of wind turbines, which will cause vibrations of towers, blades and other components, which will pose a threat to the safety of the entire wind power generation system, and frequent actions of the yaw system will also bring Problems such as yaw power loss and yaw component wear

[0004] The long-term frequent start and stop of the yaw system will cause damage to the yaw system and other wind turbine components associated with it. , resulting in huge operation and maintenance costs and power generation losses. Therefore, the research on optimal control methods of yaw system can avoid irreparable losses from the perspective of preventive maintenance, which is directly related to the power generation efficiency and wind energy utilization rate of wind turbines.

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