Cooperative control method for tandem double-wind-wheel wind turbine generator set

Abstract

The invention discloses a cooperative control method for a tandem double-wind-wheel wind turbine generator set, and belongs to the technical field of wind power control. The problems that an existing tandem double-wind-wheel wind turbine generator set is not decoupled in operation and low in operation efficiency are solved. The tandem double-wind-wheel wind turbine generator set front and back wind wheel cooperative control strategy with transmission decoupling is provided, firstly, after operation intervals of front and back wind wheels are divided and the optimal output value is determined, the maximum overall output of the wind turbine generator set serves as the target, and output cooperative control over the front wind wheel and the rear wind wheel is carried out by adjusting the rotating speeds and pitch angles of the front wind wheel and the rear wind wheel. According to the cooperative control method for the tandem double-wind-wheel wind turbine generator set, the highest overall efficiency and the lowest load of the unit are taken as control targets, the front and rear wind wheels cooperate with each other, so that the unit is higher in efficiency, wider in high-efficiency area and more friendly in grid connection, the kilowatt-hour cost of the wind turbine generator set can be greatly reduced, and the grid connection characteristic of the unit is improved.

Description

technical field [0001] The invention belongs to the technical field of wind power control, and in particular relates to a coordinated control method for a tandem double wind turbine wind turbine. Background technique [0002] With the rapid development of wind power installed capacity, the current mainstream wind turbines adopt the form of single wind turbine horizontal axis, and are developing towards large-scale development. However, with the large-scale development of wind turbines, their core key technologies are subject to many restrictions, and there is an urgent need to develop new forms. High-efficiency wind energy conversion device. [0003] The tandem double-wind rotor structure is valued for its high efficiency and mature key core equipment. However, in the existing reported double wind turbines, the two wind rotors are coaxial or connected to the main shaft through bevel gears. The two wind rotors of the structure can only rotate at the same speed, and cannot r...

AI Technical Summary

Problems solved by technology

However, the existing reported double wind turbines use two wind rotors coaxial or connected to the main shaft through bevel gears.

The two wind rotors of the structure can only rotate at the same speed, and cannot realize the independent operation of the two wind rotors and the coordinated control of the front and rear wind rotors, which leads to the inability of the two wind rotors to operate in their respective high-efficiency zones, resulting in low overall efficiency of the unit

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