Yaw control method for large-sized wind-driven generator group

Abstract

The invention relates to a yaw control method for a large-sized wind powered generator unit. A current yaw angle reference value alpha reference is obtained according to a current wind direction, a current yaw angle practical value alpha practice is obtained by a encoder or a tachometer, a yaw angular error delta alpha is obtained by subtracting the yaw angle practical value alpha practice by the current yaw angle reference value alpha reference, and a corresponding yaw mechanism control rule is calculated by integrating the yaw angular error delta alpha and the variation tendency thereof by a fuzzy controller. Furthermore, an obtained electrical signal of the yaw mechanism control rule is sent to a yaw actuating mechanism to control a propeller pitch angle, and the yaw angle of the wind powered generator unit traces the yaw angle reference value alpha reference to enable the yaw angle practical value alpha practice and the yaw angle reference value alpha reference of the wind powered generator unit to be kept consistent. The invention obviously enhances the total precision, is favorable to increasing the year total generated energy of the wind powered generator unit, has high adaptability for complex and extreme cases, greatly enhances the operating effectiveness, furthest prolongs the mechanical life of the yaw actuating mechanism, and also has low remodel difficulty and low cost.

Description

technical field

[0001] The invention relates to a yaw control method of a large wind power generating set, in particular to a yaw control method based on fuzzy control and oriented to a yaw actuator. Background technique

[0002] Yaw control is an essential part of the electronic control system of wind turbines. The yaw control system realizes automatic and accurate wind-facing within the available wind speed range, 90-degree crosswind under the unavailable wind speed range, and automatic untwisting in the case of continuous tracking of wind direction that may cause cable entanglement, so that the wind turbine can run Stable and reliable, efficient use of wind energy, saving a lot of energy, further reducing power generation costs and effectively protecting wind turbines.

[0003] Today's yaw control method generally adopts "proportional integral" control. Although this method is simple and practical, it has insurmountable problems such as difficulty in improving control ac...

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