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Improved observation method suitable for equivalent wind speed of impeller surface of wind driven generator

A wind turbine and equivalent wind speed technology, applied in the monitoring of wind turbines, the control of wind turbines, wind turbines, etc., can solve the problems of reducing the reliability of wind turbines and increasing the cost of wind turbines

Pending Publication Date: 2020-04-17
JISHOU UNIVERSITY
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Problems solved by technology

Obviously, more anemometers will increase the cost of wind turbines and reduce the reliability of wind turbines

Method used

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  • Improved observation method suitable for equivalent wind speed of impeller surface of wind driven generator
  • Improved observation method suitable for equivalent wind speed of impeller surface of wind driven generator
  • Improved observation method suitable for equivalent wind speed of impeller surface of wind driven generator

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Embodiment Construction

[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The described embodiments are intended to facilitate the understanding of the present invention, but not to limit it in any way.

[0034] The invention provides an improved observation method, which is used to ensure the accurate and real-time observation of the equivalent wind speed of the impeller surface, figure 1 It is a structural block diagram of the observer of the present invention, and the observation method includes the following steps:

[0035] (1) Considering the transmission chain model of the wind turbine unit, using the commonly used two-mass model, the aerodynamic torque T of the fan a As an unknown disturbance input, the impeller speed ω r and generator electrical torque T g For a known input, the aerodynamic torque is observed using the Unknown Input Disturbance Observer (UIDOB)

[0...

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Abstract

The invention provides an improved observation method for equivalent wind speed of an impeller surface of a wind driven generator. Aiming at the defects that an observation method based on a wind turbine generator mechanism model is high in dependence on model parameters and a method based on a neural network model is large in data volume, large in calculated amount, complex in model and the like,targeted improved modeling is carried out. Firstly, an unknown input disturbance observer is used for accurately observing unknown input aerodynamic torque of a fan transmission chain model; and thenan extreme learning machine model based on nonlinear input-output mapping is utilized to approach the aerodynamic characteristics of the wind turbine, so that the complexity of the model is reduced,meanwhile, the observation precision of the equivalent wind speed of the impeller surface is improved, and the observation speed is greatly increased.

Description

technical field [0001] The invention belongs to the field of wind power generators, and relates to wind speed observation and fan control of large wind power generators, in particular to an improved observation method applicable to the equivalent wind speed of the impeller surface of the wind power generator. Background technique [0002] With the fierce competition in the wind energy market, it is of great significance to improve the performance of wind turbines and reduce the load on the components of the wind turbine through the optimization of control strategies. As we all know, unlike traditional general control problems, wind turbines are mainly driven by external forces, that is, wind speed, which is a random variable that varies with time and space dimensions, and is also a dynamic parameter variable that determines the operating point of wind turbines. This means that the wind not only affects the dynamic characteristics of each structural component of the power uni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20F03D17/00F03D7/00G06F111/10
CPCF03D17/00F03D7/00Y02E10/72
Inventor 邓小飞向晓燕黄光亚
Owner JISHOU UNIVERSITY
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