Hydraulic yaw system and regulation and control method thereof for wind generating set

Abstract

The invention provides a hydraulic yaw system and a regulation and control method thereof for a wind generating set and belongs to the technical field of wind power. By setting a plurality of yaw motors which provide normal torque and a yaw hydraulic motor which provides reverse torque, the yaw motor and yaw hydraulic motor respectively are connected with a yaw bearing through the gear of a speed reducer. When a yawing happens, the reverse torque provided from the yaw hydraulic motor is less than the normal torque provided from the yaw motor. According to sensing signals, cooperation between a fan and a wind direction is judged; when a wind wheel is perpendicular to the wind direction through the rotation of a fan, and the wind wheel is windward, the torque of the yaw motor and the torque of the hydraulic motor are equal until the yawing ends, then a yaw brake and a yaw brake friction disc stop working, through the engagement between the gear of the reducer and the gear of a yaw bearing, the entire yaw system is balanced. By the hydraulic yaw system and the regulation and control method thereof, the rotation impact of yawing is effectively slowed down, and the yawing is operated gently.

Description

technical field [0001] The invention belongs to the technical field of wind power, and in particular relates to a hydraulic yaw system for a wind power generator set and a control method thereof, and is particularly suitable for the application of the yaw system of a large wind power generator set. technical background [0002] As a clean energy source, wind power generators have been widely used at present. At present, there are mainly the following types of large-scale commercial wind power generators: double-fed variable speed constant frequency wind power generators, semi-direct drive variable speed constant frequency generators and direct drive variable speed constant frequency generators . These wind turbines use an electric yaw system to adjust the rotor and align it with the wind. The yaw system generally includes a wind vane that senses the wind direction, a yaw motor, a yaw planetary gear reducer, a large gear of the gyratory body, etc. Its working principle is a...

AI Technical Summary

Problems solved by technology

[0003]This traditional yaw system responds slowly, and the inertia and instability have a great impact on the yaw gear of the wind turbine, and will affect the wind turbine base. Fatigue strength, resulting in cracking or even destruction of the gearbox base

At the same time, this kind of yaw system requires the yaw brake to be in a locked state for a long time, which will cause great wear and tear on the brake disc, and the brake disc needs to be replaced frequently

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