Chord length changing device, blade, chord length changing control method and control system

Abstract

The invention provides a chord length changing device and a blade as well as a chord length change controlling method and controlling system. The chord length changing device is used for changing chord length of the blade of a wind generating set; the chord length changing device comprises a sliding groove, an extension piece and a transmission mechanism, wherein an inlet / outlet is formed in one end of the sliding groove; the extension piece can be extended to predetermined length toward the outer part through the inlet / outlet; and the transmission mechanism is combined with the extension piece, so that the extension piece can be expanded and moved between the outer part of the inlet / outlet and the inner part of the inlet / outlet. According to the chord length changing device disclosed by the invention, the chord length of the blade can be increased at low air speed, and the air catching ability of the blade is increased so as to improve power generation quantity.

Description

technical field [0001] The present invention relates to the technical field of wind power generating sets, more specifically, to a chord length changing device that increases the chord length of the blades at low wind speeds, thereby increasing the wind-catching capacity of the blades and thus increasing the power generation, including the chord length change device A blade of a length changing device, a control method and a control system for the chord length change of the blade. Background technique [0002] When designing the blades of wind turbines, the blades are generally designed for standard wind conditions. [0003] When matching wind turbines, due to the influence of local safety factors, although different blades can be selected for matching, once the blades are finalized, the amount of modification is relatively small. In addition, the production and processing of the blade depends on the blade mold, and the possibility of subsequent changes to the blade is very...

AI Technical Summary

Problems solved by technology

[0005] However, if the wind speed is too small (below the rated wind speed), it will cause the blades to reduce the power generation efficiency

In addition, after a period of operation, the blades are prone to surface pollution, leading edge corrosion and other problems, which will also reduce the wind-catching ability of the blades and reduce the power generation efficiency of the blades.

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