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Method for controlling azimuth angles of wind turbine generator based on speed closed-loop

A wind turbine and speed closed-loop technology, which is applied in the control of wind turbines, wind power generation, wind turbines, etc., can solve the problems of inaccurate control of a given azimuth angle and the inability to realize automatic control, etc., and achieve efficient and accurate azimuth angle control. Effect

Active Publication Date: 2021-03-05
CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies in the prior art, the present invention proposes a wind turbine azimuth control method based on a speed closed-loop to solve the technical problems of inaccurate control of a given azimuth and inability to realize automatic control existing in the prior art

Method used

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  • Method for controlling azimuth angles of wind turbine generator based on speed closed-loop
  • Method for controlling azimuth angles of wind turbine generator based on speed closed-loop
  • Method for controlling azimuth angles of wind turbine generator based on speed closed-loop

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Embodiment 1

[0040] This embodiment provides a method for controlling the azimuth angle of a wind turbine based on a speed closed loop, including the following steps:

[0041] When the wind turbine is stopped, input the locking target azimuth of the wind rotor;

[0042] Reset the initial azimuth to make the initial azimuth equal to the real-time measurement azimuth;

[0043] Calculate the difference between the actual target azimuth minus the initial azimuth, and judge the relationship between the difference and the segmentation angle that needs to be compensated; determine the actual target azimuth according to the judgment result;

[0044] Real-time calculation of the real-time deviation obtained by subtracting the initial azimuth angle from the real-time measured azimuth angle of the wind wheel, and determine the control stage type according to the real-time deviation;

[0045] According to the determined control stage type, the corresponding wind rotor speed reference value is introdu...

Embodiment 2

[0086] Using the control method of Embodiment 1, when the azimuth angle of the wind turbine is actually controlled, when the high-speed shaft brake is successfully applied, the pitch is not necessarily at the stop position.

[0087] In order to solve the above technical problems, on the basis of Embodiment 1, the following technical solution is adopted: when the high-speed shaft brake is put into operation, the main control system directly sends the pitch angle during shutdown to the pitch system, and the feathering stops.

[0088] In this example, θ stop is the pitch angle at shutdown, which is directly issued by the main control system to the pitch system, so that the pitch is feathered towards the shutdown angle to ensure the control effect on the azimuth angle of the wind turbine.

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Abstract

The invention provides a method for controlling azimuth angles of a wind turbine generator based on a speed closed-loop. The method comprises the following steps of: inputting a locking target azimuthangle of a wind wheel; resetting an initial azimuth angle as a real-time measured azimuth angle; calculating a difference value obtained by subtracting the initial azimuth angle from an actual targetazimuth angle, and judging the size relationship between the difference value and a segmentation angle to be compensated; determining the actual target azimuth angle; calculating real-time deviation,and determining a control stage type according to the real-time deviation; introducing a corresponding rotating speed reference value of the wind wheel into a rotating speed control closed-loop, andinputting the rotating speed reference value into an azimuth angle controller; calculating a given variable pitch angle, and controlling the rotating speed of a low-speed shaft to be a rotating speedreference value of the wind wheel until entering a peristaltic approach stage; judging a high-speed shaft brake input condition, and inputting a high-speed shaft brake; automatically locking a low-speed shaft locking pin. According to the method, the technical problems that control on a given azimuth angle is inaccurate, and automatic control cannot be achieved in the prior art can be solved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a method for controlling the azimuth angle of a wind turbine based on a speed closed loop. Background technique [0002] A wind turbine is a device that obtains wind energy from the wind through blades and converts it into electrical energy. During maintenance of wind turbines, and in some working conditions requiring calibration tests, it is required to lock the wind rotor at a series of specified azimuth angles. At present, the conventional operation method is to use the wind rotor to rotate freely to make the wind rotor approach the target azimuth angle; when approaching the wind rotor azimuth angle, artificially cast the high-speed shaft brake. At this time, due to the large error, the operator cannot accurately drop the low-speed shaft brake locking pin, and can only use the high-speed shaft turning driver to drive the wind wheel to the target position to comp...

Claims

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Application Information

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IPC IPC(8): F03D7/00F03D7/04F03D17/00F03D80/50
CPCF03D7/00F03D7/0244F03D7/0268F03D7/043F03D7/044F03D17/00F03D80/50Y02E10/72
Inventor 邓雨文茂诗韩花丽张凯张帆张会阳谭术平代思维
Owner CSIC CHONGQING HAIZHUANG WINDPOWER EQUIP
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