A control method for wind turbines based on wind rotor thrust estimation

A technology for a wind turbine generator set and a control method, which is applied in the control of wind turbines, wind turbines, wind energy power generation, etc., can solve the problems of large estimation error and loss of power generation, and achieve cost saving, high reliability, and improve the competitiveness of the generator set. Effect

Active Publication Date: 2018-11-09
GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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Problems solved by technology

However, the above methods all indirectly estimate the thrust of the wind turbine through other parameters, and there are problems of large estimation errors and loss of power generation

Method used

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  • A control method for wind turbines based on wind rotor thrust estimation
  • A control method for wind turbines based on wind rotor thrust estimation
  • A control method for wind turbines based on wind rotor thrust estimation

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Embodiment Construction

[0052] The present invention will be further described below in conjunction with specific examples.

[0053] like figure 1As shown, the control method based on wind rotor thrust estimation for wind turbines described in this embodiment is mainly aimed at the current problem of excessive load of wind turbines. On the basis of conventional control strategies, the control method based on wind rotor thrust estimation is added The module of the load reduction control strategy is as follows: First, the wind speed at the fan impeller, the blade pitch angle and azimuth angle, and the generator speed are measured in real time through the sensor; then the collected data is combined with the blade aerodynamic data, and the blade element is used Momentum theory estimates the aerodynamic thrust of the impeller at different times, that is, the wind rotor thrust; then according to the estimated wind rotor thrust, the corresponding minimum pitch angle is obtained through the look-up table met...

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Abstract

The invention discloses a wind wheel thrust estimation-based control algorithm for a wind power generation unit. Firstly, the wind speed at an impeller of a wind power generator, the blade pitch angle, the azimuth angle and the rotating speed of the wind power generator are measured by the aid of sensors in real time; then acquired data are combined with blade aerodynamic data, and wind wheel thrust applied to the impeller at different moments is estimated through a blade element momentum theory; according to the magnitude of the estimated wind wheel thrust, the corresponding minimum pitch angle is obtained through a look-up table method, the minimum pitch angle value is input into a variable-pitch controller and is compared with the minimum pitch angle value set by the variable-pitch controller, and the maximum value is used as the new minimum pitch angle limiting value of the controller, that is, the thrust applied to the unit is changed by changing the minimum pitch angle limiting value of the controller in real time, so that wind wheel thrust estimation-based load optimization control on the wind power generation unit is realized, and the design cost of the wind power generator is reduced.

Description

technical field [0001] The present invention relates to the technical field of load control of a wind power generating set, in particular to a control method of a wind generating set based on wind wheel thrust estimation. Background technique [0002] With the development of wind power generation technology and market demand, the capacity of wind turbines is getting larger and longer, and the blades are getting longer and longer, and the wind turbines often operate in a relatively harsh external environment, which causes the unit load to increase. It constitutes a great safety hazard to the operation of the unit and brings negative impact on the owner's economic benefits. [0003] Aiming at the problem of excessive unit load, there are currently many solutions, among which the following two solutions are common: [0004] 1. Strengthen the unit components to improve the safety performance of the unit; [0005] 2. Optimizing the control strategy and optimizing the load reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D7/04
CPCF03D7/0224F03D7/043Y02E10/72
Inventor 邹荔兵张启应周玲刘凡鹰段居永任永卢军周军黄满洪
Owner GUANGDONG MINGYANG WIND POWER IND GRP CO LTD
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