Control method of wind turbine generator yaw damping moment

Abstract

The invention relates to a control method of a wind turbine generator yaw damping moment, and belongs to the technical field of wind power generation. The method comprises the steps that an electromagnetic yaw system is adopted for controlling the yaw damping moment in real time, when the wind direction is changed, the wind power rotating torque of wind power action on an engine room is calculated at first; if the wind power rotating torque is smaller than driving torque needed by yaw of the engine room, the current of a yaw motor rotor is adjusted, so that the generated electromagnetic attraction force is equal to the gravity of the engine room so as to reduce the yaw damping torque; if the wind power rotating torque is larger than or equal to the driving torque needed by yaw of the engine room, the current of the yaw motor rotor is adjusted, so that the generated electromagnetic attraction force is smaller than the gravity of the engine room, and the generated friction resisting moment increases the yaw damping torque; three-phase alternating current is led into the yaw motor rotor and then the engine room is driven to perform yawing according to the given yaw rotating speed. The yaw damping torque of the wind turbine generator is regulated in real time, and the control method has the advantages of being easy and convenient to control, accurate in wind alignment, low in yaw energy consumption, free of noise, little in maintenance and the like.

Description

technical field [0001] The invention relates to a control method, in particular to a control method for the yaw damping moment of a wind turbine, and belongs to the technical field of wind power generation. Background technique [0002] The yaw system is an essential part of the horizontal axis wind turbine. At present, the large and medium-sized wind turbines at home and abroad all use active yaw gear-driven yaw systems. The yaw system is generally composed of yaw gear ring, side bearing, sliding pad holding device, up and down and side sliding pads, yaw driving device, adjusting bolts, yaw limit switch, proximity switch, wind speed and direction instrument, etc. Among them, the yaw driving device includes a yaw motor, a reduction gearbox, and a pinion, which are fastened to the main frame of the nacelle by bolts. [0003] The working principle of this yaw system is: when the wind direction changes, the control system controls the yaw motor in the yaw drive device to run s...

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the traditional yaw system has defects such as high failure rate, automatic adjustment of yaw damping, and inconvenient maintenance.

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