Wind turbine load control method and device

Abstract

Provided is a load control method and device for a wind turbine, the load control method comprising: obtaining characteristic parameters of the wind turbine for load prediction; obtaining an estimated load value of the wind turbine by inputting the acquired characteristic parameters into a virtual load sensor; based on The obtained load estimate adjusts the control strategy of the wind turbine. The wind turbine load control method and device of the exemplary embodiment of the present invention can use the trained virtual load sensor to realize real-time monitoring of the load of the wind turbine on site, and can provide a control strategy adjustment reference according to the load, so as to ensure While ensuring the safety of the wind turbine, the power generation performance of the wind turbine is not lost.

Description

technical field [0001] The present invention generally relates to the technical field of wind power generation, and more specifically, relates to a load control method and device for a wind turbine. Background technique [0002] To reduce the load of the wind turbine and ensure the safe operation of the wind turbine is a main purpose of wind turbine control. The load value of each key structural component of the wind turbine is the most direct basis for deciding whether to carry out load reduction control. [0003] In the simulation process, the controller parameters are usually adjusted according to the load sequence to realize the load control of each component of the wind turbine. During the actual operation of wind turbines, it is often necessary to install load sensors to obtain real-time load information, but the installation, maintenance and replacement of such load sensors are very expensive, and cannot be widely used at present. In the absence of load sensors, cur...

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Problems solved by technology

During the actual operation of wind turbines, it is often necessary to install load sensors to obtain real-time load information, but the installation, maintenance and replacement of such load sensors are very expensive, and cannot be widely used at present

In the absence of load sensors, currently operating wind turbines generally adopt conservative control strategies to ensure the safety of wind turbine operation, but correspondingly, it is impossible to guarantee the optimal power generation performance of wind turbines.

[0004] That is to say, due to the high price of physical load sensors and the difficulty of installation and maintenance, wind turbines cannot be installed with load sensors when they are running on site, so real-time monitoring of loads cannot be achieved. However, the load values ​​of key structural components determine whether it is necessary to carry out Load shedding control and the extent to which control parameters need to be adjusted, so when there is a lack of real-time load data, only conservative control strategies can be adopted, which cannot take into account the optimal power generation

[0005] In addition, it is difficult to obtain accurate and real-time wind resource data on the site of wind turbines. This is because the anemometer and wind direction instrument in the nacelle commonly installed in wind turbines will be disturbed by the rotation of the impeller, resulting in inaccurate measurement of wind speed and wind direction, while other There are currently no suitable measurement devices for wind resource parameters such as wind shear and inflow angle

If the on-site wind resource parameters are used to infer the load, it will be limited by the detection accuracy and real-time performance of the wind resource parameters

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