Start-up control method, device, controller and system for wind power generating set

Abstract

The present application relates to a start-up control method, device, controller and system of a wind power generating set. Predetermined control mode and start acceleration control; the acceleration control includes drive torque acceleration control: output torque control signal to the converter of the wind power generating set, so that the wind power generating set absorbs grid energy; output driving torque value to the generator of the wind power generating set , so that the generator utilizes the grid energy to output drive torque to drive the impeller to accelerate; when the current impeller speed value is greater than the free start speed threshold, switch to a predetermined control mode and turn off the acceleration control. By outputting the drive torque, the impeller is forcibly driven to accelerate. The application has the effect of shortening the start-up process of the wind power generating set when the external wind speed is small, thereby ensuring the power generation of the wind generating set.

Description

technical field [0001] The present application relates to the field of wind power generation control, in particular to a start control method, device, controller and system for a wind power generating set. Background technique [0002] The wind turbine is an indispensable and important part of the wind power generation system, including a tower and a nacelle arranged on the tower, the nacelle includes a rotating hub, and at least one blade is arranged on the rotating hub, and the blade and the rotating hub constitute an impeller; Consists of a generator connected to a rotating hub. After the wind blows, the wind drives the impeller to rotate. When the speed of the impeller is greater than the starting speed, it can be connected to the grid for power generation. [0003] When the wind turbine starts, it is greatly affected by the external wind speed. When the external wind speed is low, the wind energy is small, and the acceleration of the impeller is small, so it takes a l...

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Problems solved by technology

[0005] In view of the related technologies mentioned above, the inventors found that when the wind speed is low, first, the starting torque generated by the impeller absorbing wind energy is small; And the static friction is far greater than the dynamic friction; third, the actual value of the transmission chain friction or the resistance torque synthesized by it is often larger than the design value; in summary, only by changing the starting pitch angle, it is impossible to quickly improve the wind turbine. Start-up speed, even unable to achieve the effect of speeding up the start-up speed; wind turbines still lose a lot of wind energy that can be generated due to the slow start-up process

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