Generator landing type T-shaft hybrid drive variable-pitch variable-speed wind driven generator and control method

Abstract

The invention discloses a generator landing type T-shaft hybrid drive variable-pitch variable-speed wind driven generator and a control method. A generator set is mainly realized by arranging two small speed-increasing gearboxes, wherein one speed-increasing gearbox (4) is placed at the top of a tower and the other speed-increasing gearbox (17) is placed at the bottom of the tower. The generator set comprises a main shaft (2), the tower top speed-increasing gearbox (4), a vertical transmission shaft (11), a bottom section tower barrel (16) and the tower bottom speed-increasing gearbox (17). According to the generator landing type T-shaft hybrid drive variable-pitch variable-speed wind driven generator and the control method, a motor structure is improved, and a novel polyphase permanent magnet motor is applied. The pitch angle of a vertical-axis wind driven generator is changed by the fuzzy PID variable-pitch control technology to control the change of a blade attack angle, thus the aerodynamic performance of blades is improved, and the purpose of improving the utilization rate of wind energy is achieved.

Description

technical field [0001] The invention belongs to the field of wind power generation, and specifically relates to a T-axis hybrid drive (generator floor type) variable pitch and variable speed wind power generating set. Background technique [0002] The working devices of wind turbines are usually located in the cabin at the top of the tower with a height of tens of meters. The main shafts are connected, and the weight of the generator occupies 1 / 4 to 1 / 2 of the weight of the entire cabin. Excessive nacelle weight increases the diameter, wall thickness and connection size of the tower, and also causes the natural frequency of the tower to decrease, making it closer to the first-order frequency of the wind rotor and the passing frequency of the blades, which will bring potential damage to the operation of the wind turbine. Reducing the weight of the wind turbine rotor and the nacelle is undoubtedly the best way to solve the above problems. Contents of the invention [0003]...

AI Technical Summary

Problems solved by technology

Excessive nacelle weight increases the diameter, wall thickness and connection size of the tower, and also causes the natural frequency of the tower to decrease, making it closer to the first-order frequency of the wind rotor and the passing frequency of the blades, which will bring potential damage to the operation of the wind turbine. Harm, reducing the weight of the wind turbine rotor and nacelle is undoubtedly the best way to solve the above problems

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