Wind turbine generator active regulation method and method based on wind speed advance measurement

Abstract

The invention discloses a wind turbine generator active regulation method based on wind speed advance measurement. The method comprises the following steps of 1, establishing a cost function accordingto an active regulation optimization objective of a wind generating set; 2, establishing a wind generating set state prediction equation by using a wind speed and wind generating set model in advance; 3, solving the cost function by utilizing a prediction state value to obtain a sequence of the optimal given pitch angle and a sequence of a given torque; and 4, taking the sequence of the optimal given pitch angle of the wind generating set and the first element of the sequence of the given torque as an output of a controller. Under the high-speed wind condition, when the active power output ismet to be equal to the target power, the action of a variable-pitch mechanism can be reduced, the fatigue load of the variable-pitch system is reduced, and the maximum power tracking operation is realized under a low-speed wind condition. In each prediction step size, only one of a pitch angle sequence or a torque sequence is adopted as a candidate limited control set, so that the operation amount of the controller is greatly reduced, and the engineering applicability is enhanced.

Description

technical field [0001] The invention belongs to the technical field of wind turbine control, and in particular relates to an active power control method and device for reducing a pitch action based on wind speed measurement in advance. Background technique [0002] With the continuous development of new energy sources in the country, the proportion of wind power generation in the grid is increasing. The unilateral pursuit of power generation will lead to large fluctuations in output power, which will affect the safety and reliability of the power grid. For this reason, wind turbines need to have the ability to regulate active power, that is, the output active power of wind turbines needs to be kept at the target value under medium and high-speed wind conditions, and the wind turbines need to operate at maximum power tracking under low wind speeds. The existing mainstream active power control method is to adjust the ability of wind turbines to absorb energy from the wind by ...

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Problems solved by technology

[0004] The present invention aims to solve the problem of insufficient performance of wind turbines caused by existing control technologies

The present invention provides a wind turbine active power adjustment method based on wind speed measurement in advance, and its purpose is to solve the problem that the traditional control method of the pitch mechanism frequently operates, resulting in increased fatigue load and shortened life of the pitch system

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