Improved active disturbance rejection controller and system for variable pitch control of wind turbine generator

Abstract

The invention relates to an improved active disturbance rejection controller for variable pitch control of a wind turbine generator, which is connected with a controlled fan, is used for controlling disturbance of the controlled fan, and comprises a tracking differentiator, a nonlinear combination module, an extended state observer and a BP neural network module, wherein the BP neural network module is embedded in the extended state observer and is used for fitting partial disturbance, and adjusting parameters of the extended state observer on line. When the system works, disturbance estimation comprises two parts, specifically, a disturbance value fBP predicted by the BP neural network module and a disturbance value estimated by the extended state observer, and compared with the prior art, the system has the advantages of being higher in anti-interference capacity, wider in range, better in control effect and the like.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to an improved active disturbance rejection controller and system for pitch control of wind turbines. Background technique [0002] Active Disturbance Rejection Controller (ADRC) is an automatic control method applied in industrial process control. Its main advantages are that it can automatically track random disturbances in the system and automatically compensate the control output. The precise mathematical model of the controlled object There is no strong dependence, and it has strong anti-interference ability and control robustness. This control method has been more and more widely used in industrial process control, and its control superiority has been recognized by field engineering technology. widely recognized by personnel. [0003] The traditional Active Disturbance Rejection Controller (ADRC) has been successfully applied to the wind turbine pitch system due to its str...

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Problems solved by technology

[0003] The traditional Active Disturbance Rejection Controller (ADRC) has been successfully applied to the wind turbine pitch system due to its strong robustness and anti-interference ability, but there is still a certain delay, and the amount of calculation required for parameter setting is relatively large. Large, inefficient and other defects

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