Method and system for controlling pitch angle of wind generating set under strong wind conditions and equipment

A technology of wind turbines and control methods, which is applied in the control of wind turbines, mechanical equipment, engine control, etc., can solve the problem of low control effect, and achieve the effect of responding to pitch changes

Pending Publication Date: 2021-07-09
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of the above-mentioned prior art that the control strategy uses the state of the unit such as the rotational speed as

Method used

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  • Method and system for controlling pitch angle of wind generating set under strong wind conditions and equipment

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1As shown, a method for controlling the pitch angle of wind turbines under strong wind conditions includes the following steps:

[0044] Step 1) Obtain the current generator operating parameters;

[0045] Step 2) comparing the current generator operating parameter with the generator operating parameter setting threshold;

[0046] State 1) If the current generator operating parameter is less than the generator operating parameter setting threshold, the time will be cleared, and the first set of control loop PID operating parameter settings will be obtained from the control parameter list, and calculated according to the first set of control loop PID operating parameter settings Pitch position command, respond to pitch action;

[0047] State 2) If the current generator operating parameter is greater than or equal to the generator operating parameter setting threshold, start timing from the generator operating parameter exceeding the generator operating pa...

Embodiment 2

[0052] A method for controlling the pitch angle of a wind turbine under strong wind conditions, comprising the steps of:

[0053] Step 1) The present invention judges in real time whether the unit pitch control parameters need to be further adjusted by detecting the generator speed and comparing whether it exceeds a threshold.

[0054] Step 2) Detect the current generator speed omega, and transmit the measurement signal to the main control PLC.

[0055] Step 3) Due to the measurement method, signal conversion, and estimation method of the generator speed measurement device, the directly obtained speed measurement signal has interference components, and it is not suitable to directly participate in the control algorithm.

[0056] Step 4) Perform low-pass filtering on the currently measured generator speed to obtain the current filtered generator speed value lpf_omega.

[0057] Step 5) Acquiring the current set value ratedomega of the rated rotational speed of the generator.

...

Embodiment 3

[0079] A method for controlling the pitch angle of a wind turbine under strong wind conditions, comprising the steps of:

[0080] Step 1) The present invention judges in real time whether the unit pitch control parameters need to be further adjusted by detecting the generator speed and comparing whether it exceeds a threshold.

[0081] Step 2) Detect the current generator speed omega, and transmit the measurement signal to the main control PLC.

[0082] Step 3) Due to the measurement method, signal conversion, and estimation method of the generator speed measurement device, the directly obtained speed measurement signal has interference components, and it is not suitable to directly participate in the control algorithm.

[0083] Step 4) Perform low-pass filtering on the currently measured generator speed to obtain the current filtered generator speed value lpf_omega.

[0084] Step 5) Acquiring the current set value ratedomega of the rated rotational speed of the generator.

...

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Abstract

The invention discloses a method and system for controlling a pitch angle of a wind generating set under strong wind conditions and equipment and belongs to the field of wind power generation. Whether variable pitch control parameters of the wind generating set need to be adjusted or not is judged by detecting operation parameters of a generator, if the variable pitch control parameters exceed a design threshold, another set of independently set control loop PID parameters are started, the sensitive period of different pneumatic torques to the pitch angle under different operating parameters is considered to the maximum extent, and the variable pitch action response of the set to different operating parameters under different wind conditions is improved. After the operation parameters of a generator are judged to exceed the threshold value, a time accumulation mode is innovatively introduced, the control loop PID parameter under the higher operation parameters can be used only when the time accumulation threshold value is exceeded, and frequent switching of PID parameter setting due to frequent operation parameter changing is avoided. Thus, the operation parameters of the wind generating set can be better controlled to meet the requirements of different operation parameters on different variable pitch action responses.

Description

technical field [0001] The invention belongs to the field of wind power generation, and relates to a method, system and equipment for controlling the pitch angle of a wind turbine under strong wind conditions. Background technique [0002] Wind turbines have different pitch control strategies at different wind speeds. After reaching the rated wind speed, the generator speed is also constantly changing due to the continuous fluctuation of wind speed. At this time, it is necessary to control the generator speed by pitch control. The set point is the target, and the pitch angle positions of the three blades are constantly adjusted to control the absorbed wind energy to achieve the control target. The pitch control algorithm generally takes the speed difference as the control input, and uses the classic PID control algorithm to calculate the corresponding pitch angle. Since the sensitivity of the aerodynamic torque to the pitch angle is different under different wind speeds, th...

Claims

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Application Information

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IPC IPC(8): F03D7/00F03D17/00
CPCF03D7/00F05B2270/327F05B2270/328F03D17/00Y02E10/72
Inventor 金强蔡安民林伟荣焦冲李媛许扬蔺雪峰
Owner HUANENG CLEAN ENERGY RES INST
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