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Operation control method and system for wind turbine generator set under extreme wind power condition

A wind turbine and operation control technology, which is applied in the control of wind turbines, wind turbines, wind energy power generation, etc., can solve problems such as control effect deviation, and achieve the effect of avoiding limit loads, improving operation safety, and improving operation safety.

Active Publication Date: 2021-05-14
HUANENG CLEAN ENERGY RES INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

That is to say, the existing control strategies for extreme wind conditions include introducing wind speed and nacelle acceleration as the basis for unit operation control strategies, but the measurement of wind speed, the zero drift of nacelle acceleration, and the reliability of measuring equipment make the measurement of this method difficult. When the data signal is introduced into the control algorithm, there may be deviations in the actual control effect due to measurement deviations

Method used

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  • Operation control method and system for wind turbine generator set under extreme wind power condition

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Effect test

Embodiment 1

[0038] An operation control method for wind turbines under extreme wind conditions, such as figure 1 As shown, the speed of the wind turbine is detected in the current detection cycle. Since there is an interference signal in the measurement of the speed of the wind turbine, the signal of the measured speed of the wind turbine is filtered. Obtain the current wind turbine speed setting value, and make a difference between it and the filtered wind turbine speed to obtain the wind turbine speed difference at the current moment. Similarly, the speed difference of the wind turbine at the previous moment is calculated. The difference between the current speed difference of the wind turbine and the speed difference of the wind turbine at the previous moment is obtained to obtain the difference of the speed difference of the wind turbine before and after the time, and divided by the control period constant to obtain the speed acceleration of the wind turbine before and after the time....

Embodiment 2

[0042] An operation control method for wind turbines under extreme wind conditions. By detecting the speed of the wind turbine and comparing the difference between the speed of the wind turbine before and after the time and its change, it is judged in real time whether the wind turbine is currently experiencing extreme turbulent wind conditions.

[0043] Step 1) Obtain the speed difference of the wind turbine at the current moment and the speed difference at the previous moment to obtain the speed acceleration of the wind turbine;

[0044] details as follows:

[0045] Detect the current speed of the wind turbine and transmit the measurement signal to the main control system.

[0046] Due to the measurement method, signal conversion, and estimation method of the wind turbine speed measurement device, the directly obtained speed measurement signal has interference components, and it is not suitable to directly participate in the control algorithm. Therefore, low-pass filtering ...

Embodiment 3

[0075] An operation control method for wind turbines under extreme wind conditions, comprising the following steps:

[0076] Step 1) Obtain the speed difference of the wind turbine at the current moment and the speed difference at the previous moment to obtain the speed acceleration of the wind turbine;

[0077] Step 2) Obtain the operating value of the wind turbine based on the speed difference and speed acceleration of step 1);

[0078] Step 3) Obtain the trigger threshold of the preset wind turbine control method;

[0079] Step 4) Compare the running value of step 2) with the trigger threshold of step 3):

[0080] State 1, if the operating value of the wind turbine is less than the trigger threshold, the current power setting value P1 remains unchanged;

[0081] State 2, if the operating value of the wind turbine is greater than the trigger threshold, the power setting value is reduced to P2. At this time, the wind turbine enters the power-limited state, and the running t...

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Abstract

The invention discloses an operation control method and system for a wind turbine generator set under an extreme wind power condition, belongs to the field of wind power generation. The rotating speed which is the most reliable measurement signal of the wind turbine generator set is adopted, and the rotating speed control effect and trend at the current moment are used as conditions for judging whether the wind turbine generator set encounters wind conditions of extreme wind speed and wind direction changes or not, so that a low-load mode is entered to protect the set. Whether the wind turbine generator set encounters the extreme wind conditions or not is judged within a short time by detecting the rotating speed difference of the wind turbine generator set and the differential product of the rotating speed difference at the moment before and after detection, and if the rotating speed difference and the differential product of the rotating speed difference exceed preset threshold values, the set enters the limited power state, the method can prevent the set from experiencing the limit load to the maximum extent, and the operation safety of the set under the extreme wind conditions is improved. The set power operation mode is controlled through the set operation state, and therefore, the operation safety of the wind turbine generator set is improved under the extreme wind conditions.

Description

technical field [0001] The invention belongs to the field of wind power generation, and relates to an operation control method and system for wind turbines under extreme wind conditions. Background technique [0002] The wind rotor of the horizontal axis wind turbine absorbs wind energy and rotates, and then drives the connected wind turbine to rotate and generate electricity. However, in the face of some extreme turbulent wind conditions, the wind speed and wind direction will change drastically in a short period of time, and the speed of the wind turbine and the force on the major components will also fluctuate greatly, so that the unit is subjected to extreme loads, which is not conducive to wind turbines. running. Therefore, it is necessary to adjust the operation control strategy of the unit to reduce the load of the unit as much as possible under extreme wind conditions. [0003] The existing technical solutions for this problem generally include, according to the cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/04F03D7/06
CPCF03D7/042F03D7/06Y02E10/74Y02E10/72
Inventor 金强蔡安民林伟荣
Owner HUANENG CLEAN ENERGY RES INST
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