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A sliding mode adaptive control method for variable pitch wind turbines considering the uncertainty of the actuator

A sliding mode self-adaptive, actuator technology, applied in the control of wind turbines, monitoring of wind turbines, machines/engines, etc., can solve the problem that the fan pitch actuator cannot be stably controlled, and achieve anti-interference ability. , strengthen the anti-interference ability, the effect of suppressing the speed disturbance

Active Publication Date: 2019-05-10
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problem that the wind turbine variable pitch actuator with uncertain items cannot be stably controlled, the present invention proposes a sliding film adaptive control method for wind turbine variable pitch actuators with uncertain items. The adopted technology The scheme is as follows:

Method used

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  • A sliding mode adaptive control method for variable pitch wind turbines considering the uncertainty of the actuator
  • A sliding mode adaptive control method for variable pitch wind turbines considering the uncertainty of the actuator
  • A sliding mode adaptive control method for variable pitch wind turbines considering the uncertainty of the actuator

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Embodiment 1

[0040] The sliding mode variable structure control method has the characteristics of fast response, high control precision, and strong robustness, and is widely used in nonlinear system control with uncertain parameters and external disturbances. However, the sliding mode variable structure control method has reached Only after the sliding surface has the characteristics of being insensitive to the uncertainty of the fan system model and the parameter disturbance. In the process of approaching the sliding mode surface, it is necessary to assume that the bounds of the uncertain items are known to ensure the stability of the controller. However, in the actual system, the bounds of the uncertain parameters cannot be obtained accurately, so the controller in the control process The design of the parameters must be large enough to ensure the stability of the controller, which leads to a very conservative control process, and the selection of too large controller parameters will incr...

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Abstract

The invention provides a fan variable pitch sliding mode self-adaptive control method considering indeterminacy of a performing mechanism and belongs to the technical field of fan control. The method comprises the steps that 1, in a permanent magnetic direct drive wind power system, with a fan mechanical power original model (please see the specifications for the formula) as the basis, a fan model containing the indeterminacy of fan model parameters and the indeterminacy of output of the variable pitch performing mechanism is obtained through a fan transmission system model (please see the specifications for the formula); and 2, aiming at the fan model, containing the indeterminacy of the fan model parameters and the indeterminacy of output of the variable pitch performing mechanism, obtained in the step 1, with a non-singular terminal sliding mode surface model as the basis, a self-adaptive parameter model for a fan sliding mode self-adaptive controller is obtained. The control method provided by the invention has the characteristics of high control stability and the like.

Description

technical field [0001] The invention relates to a sliding mode self-adaptive control method for variable pitch of a fan considering the uncertainty of an actuator, and belongs to the technical field of fan control. Background technique [0002] When the wind turbine works above the rated wind speed, in order to reduce the impact of excess power on the grid, avoid the mechanical load of the wind power system from exceeding the limit, and take into account the limitation of the converter capacity, it is necessary to reduce the wind energy conversion efficiency through pitch control and limit the wind turbine capture. of energy so that its capture power remains at the rated value. [0003] From the empirical formula of wind energy utilization coefficient of wind turbines, it can be seen that there is a high-order strong coupling nonlinear relationship between the wind energy utilization coefficient of wind turbines and the input pitch angle, and the variable pitch actuator of w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/04F03D17/00
CPCF03D7/0224F03D7/042Y02E10/72
Inventor 郑雪梅宋瑞李浩昱陈若博庞松楠侯丽君李鑫
Owner HARBIN INST OF TECH