Operation control method and system of wind generating set for extreme gust

Abstract

The invention provides an operation control method and system for a wind generating set for extreme gust, and the method comprises the steps: carrying out the sliding average calculation of a first time constant and a second time constant on a detected wind speed, and judging whether a first wind speed flag bit is set to be positive or not according to a first wind speed mean value and a second wind speed mean value; moving average calculation of a third time constant is carried out on the detected wind direction, and whether the wind direction flag bit is set to be positive or not is judged according to the wind direction mean value; judging whether a power speed flag bit is set to be positive or not according to the calculated power speed of the generator; moving average calculation of a fourth time constant is carried out on the wind speed, and whether the second wind speed flag bit is set to be positive or not is judged according to the third wind speed mean value; and if each flag bit is set to be positive, wind load unloading control is carried out once within preset time, and a control strategy is maintained. According to the method, whether the unit faces extreme gust or not is comprehensively judged by combining factors such as wind direction deviation, misjudgment is reduced, and the limit load of the unit is timely and efficiently reduced.

Description

technical field [0001] The present application relates to the technical field of wind power generation, and in particular to an operation control method and system for wind power generating sets used in extreme gusts. Background technique [0002] With the development of wind power generation technology, the use of wind turbines for wind power generation has become more common, and how to ensure the safety of wind turbines has attracted more and more attention. The wind force is stipulated in the wind turbine design of the International Electrotechnical Standard IEC61400-13. When the generator set is subjected to a direction-changing extreme wind (EDC) superimposed on a direction-changing extreme continuous gust (ECD) gust, the wind speed and direction will change drastically. In this case, key components such as the yaw bearing of the unit are subjected to a large bending moment, and may experience extreme loads. Therefore, it is necessary to adjust the unit operation cont...

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Problems solved by technology

[0006] For this reason, the first purpose of this application is to propose an operation control method for wind turbines used in extreme gusts. This method judges wind direction deviation and solves the impact of extreme loads caused by rapid changes in wind direction. At the same time, the integrated power Comprehensive judgment of various factors such as wind speed change, wind speed change, and wind direction deviation can accurately determine whether the unit is currently facing extreme gusts, reducing the probability of misjudgment, and is conducive to timely and efficient changes when the unit is facing extreme gusts. Unit control strategy to reduce ultimate load

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