Lidar-assisted control method based on impeller equivalent wind speed correction

Abstract

The invention discloses a laser radar auxiliary control method based on the correction of the equivalent wind speed of the impeller, which comprises the following steps: reconstructing the aerodynamic torque of the wind wheel surface of the wind power generating set based on the Lomberg observer; calculating the current wind speed of the wind generating set based on the Newton method; Equivalent wind speed on the wheel surface; calculate feed-forward equivalent wind speed based on airborne lidar; correct the time-delay sequence of lidar feed-forward equivalent wind speed; correct the numerical sequence of lidar feed-forward equivalent wind speed; The controller performs laser radar auxiliary control. The invention has the following beneficial effects: it can reduce the numerical deviation between the feed-forward equivalent wind speed provided by the airborne laser radar and the actual equivalent wind speed at the wind rotor of the wind power generating set, improve the time accuracy at the wind rotor of the actual wind generating set, and improve the Auxiliary control effect.

Description

technical field [0001] The present invention relates to the technical field of wind power generator control, in particular to a method capable of reducing the numerical deviation between the feed-forward equivalent wind speed provided by an airborne laser radar and the actual equivalent wind speed at the wind rotor of a wind power generator, and improving the actual wind power of a wind power generator. The time accuracy at the impeller, and the lidar-assisted control method based on the impeller equivalent wind speed correction to improve the radar-assisted control effect. Background technique [0002] With the development of wind power technology, the application of airborne lidar is becoming more and more extensive. The airborne lidar senses the incoming wind speed in front of the wind turbine, and after processing, it forms the equivalent wind speed of the front feed of the wind rotor, which is used as the input of the radar auxiliary controller. However, the wind rotor...

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Problems solved by technology

[0004] In order to overcome the problems in the prior art that the feed-forward equivalent wind speed provided by the airborne laser radar is affected by the evolution of wind speed, the deviation from the actual equivalent wind speed at the wind turbine rotor of the wind power generator is too large or the radar feed-forward is equivalent. The time when the wind speed arrives at the wind turbine surface of the wind turbine is not accurate enough. It provides a method that can reduce the deviation between the feed-forward equivalent wind speed provided by the airborne laser radar and the actual equivalent wind speed at the wind turbine rotor, and improve the actual wind turbine. The time accuracy at the wind wheel and the lidar-assisted control method based on the equivalent wind speed correction of the impeller to improve the radar-assisted control effect

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