Typhoon defense operation control method for wind driven generator group, device and the group using the device

Abstract

The invention discloses an anti-typhoon operation control method of a wind power generator group, including: typhoon forecast signals are received; before the coming of a typhoon, blades are feathered, the generator cabin is controlled to actively drift and assure the tail part of the generator cabin of facing to wind, thus releasing a drift brake and stopping; when the typhoon comes, by the function of the tail rudder of the blades, the windward angle of the tail part of the generator cabin is continuously adjusted, thus realizing a free drift of the generator cabin according to wind direction. Due to the feathering of blades before the coming of the typhoon, by controlling the active drift of the generator cabin, the head part of the generator cabin rotates to downwind direction from where the typhoon comes, thus the free drift of the generator cabin is well prepared by the tail part of the blades; when the typhoon comes, the free drift of the generator cabin is realized by depending on the aerodynamical moment applied to the blades, and the windward angle of the tail part of the generator cabin is continuously adjusted by the function of tail rudder of the blades to reduce wind load, blade root bending moment, and overturning moment applied to the generator group, thus preventing any damage to the generator group. On the basis, the invention additionally discloses an anti-typhoon operation control device of a wind power generator group and a wind power generator group using the device.

Description

technical field [0001] The present invention relates to the control field of a wind power generator with a rotation axis substantially at right angles to the wind direction, in particular, a typhoon-proof operation control method and device for a wind power generating set and a wind generating set using the device. Background technique [0002] In the southeast coastal area of ​​China, where wind resources are abundant, typhoons occur very frequently, and such harsh environmental conditions often lead to damage and failure of wind power generating units (hereinafter referred to as units). When a typhoon comes, the wind load on the structure of the unit is related to the air density and wind speed; the air density is extremely high during a typhoon, and the wind force level sometimes reaches level 16 or above; If the design load limit is exceeded, the unit and even the entire wind farm will be damaged. [0003] In order to reduce the harm of typhoon, some methods of avoiding...

AI Technical Summary

Problems solved by technology

This kind of unit can automatically rotate to avoid the wind, but at the moment of super gust, the nacelle and blades may not have time to yaw or pitch, so that the nacelle and blades still bear a large wind-receiving area, that is, a large impact load; At this time, the wind load, blade root bending moment and overturning moment on the unit may exceed the design range, resulting in damage to the unit

[0004] It can be seen that the existing units and their operation control methods cannot fully meet the requirements of typhoon protection

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