Variable universe fuzzy electric pitch control method for optimizing parameters

A technology for optimizing parameters and control methods, applied in the control of wind turbines, engines, wind power generation, etc., can solve the problems of non-optimal controller parameters, non-optimal control quality, etc., to improve dynamic performance and steady-state performance, Accurate tracking and the effect of improving control accuracy

Inactive Publication Date: 2012-10-10
LANZHOU JIAOTONG UNIV
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Problems solved by technology

However, the controller still has a certain blindness in the process of parameter setting, and the key to variable domain fuzzy control is to determine the expansion factor so that the domain of discourse changes within a reasonable range, but currently it is mainly achieved by relying on experience values ​​or repeated debugging. , so that the controller parameters may not be optimal, and the control quality is not optimal

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  • Variable universe fuzzy electric pitch control method for optimizing parameters
  • Variable universe fuzzy electric pitch control method for optimizing parameters
  • Variable universe fuzzy electric pitch control method for optimizing parameters

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Embodiment Construction

[0017] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0018] When the wind speed is above the rated wind speed and cut out below the wind speed, the pitch system starts to change the pitch, and the given driving motor speed and pitch angle , calculate the speed error according to the actual measured value , pitch angle error and speed error variation , Pitch angle error variation , and use it as the input of the electric pitch system position and speed variable universe fuzzy controller, see the attached figure 1 with 2 , according to Equation 1, the structure of the expansion factor is established, and there are 6 parameters to be optimized.

[0019] A fuzzy control rule table for the electric pitch va...

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Abstract

The invention discloses a variable universe fuzzy electric pitch control method for optimizing parameters, and relates to three-closed-loop (namely a current loop, a velocity loop and a position loop) control established by an electric pitch system. Through analyzing the structure of contraction-expansion factors of the variable universe, the parameters thereof can be optimized by genetic algorithm, the intelligent optimization of the parameters can be realized, and a reasonable mechanism for determining the contraction-expansion factors can be established. According to the invention, the optimized variable universe fuzzy control algorithm is applied to the velocity and position control for the electric pitch system, and the appropriate target function is established according to control objectives of the velocity loop and the position loop, so that the optimal control performance of a variable universe fuzzy controller can be realized. The torque pulsation is efficiently inhibited, the dynamic and steady performances of the system are improved, and finally the quick and accurate tracing of the pitch angle position is realized, therefore, an efficient and practical control method is provided for the wind power pitch system.

Description

technical field [0001] The present invention relates to the technical field of electric pitch control methods, in particular to a parameter-optimized fuzzy electric pitch variable control method. Background technique [0002] For a nonlinear system with high-order strong coupling, severe lag, and large inertia, such as the electric pitch system of a wind turbine, although the conventional controller technology is very mature and widely used in industrial process control, it must meet the needs of the wind turbine to quickly respond to wind speed. The control effect of these controllers is not ideal. For the electric pitch system based on fuzzy control, the fuzzy controller can perform some adjustments through the simple scale transformation of the formula. There is no need for in-depth study of the knot model of the control loop, and a certain control effect can be obtained. The division of the universe can also be further improved. Improve the control quality, which is the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 董海鹰魏占宏李宏伟李晓青王国华李帅兵马博李晓楠
Owner LANZHOU JIAOTONG UNIV
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