Wind turbine generator operation control method and device based on prony algorithm and storage medium

Abstract

The invention discloses a wind turbine generator operation control method based on a prony algorithm, and belongs to the technical field of wind power generation. The method comprises the following steps that firstly, detected operation parameter signals are filtered to obtain filtered operation parameter signals; the filtered operation parameter signals are approximately fitted into a plurality of models with exponential functions of the generator rotating speed oscillation amplitude, the generator rotating speed oscillation frequency, the generator rotating speed oscillation phase and the generator rotating speed oscillation attenuation factor by using the prony algorithm; mathematical transformation is performed on the model to obtain a linear difference equation; after the linear difference equation is solved, the generator rotating speed oscillation frequency is obtained through calculation; and whether the calculated generator rotating speed oscillation frequency is within a preset value range or not is judged, and the operation state of the wind turbine generator is adjusted according to the judgment result. According to the method, mechanical and electrical parts of the wind turbine generator can be prevented from being in a periodic oscillation state to the maximum extent under the specific wind condition, and the situation that the wind turbine generator is damaged due to oscillation caused by instability is avoided.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, and in particular relates to a prony algorithm-based wind turbine operation control method, device and storage medium. Background technique [0002] The wind rotor of the horizontal axis wind turbine absorbs wind energy and rotates, and then drives the connected generator to rotate to generate electricity. Since the cost corresponding to the design weight of the blade accounts for an important part of the wind turbine, reducing the weight of the blade is an important way to reduce the cost per kilowatt-hour of the wind turbine. At the same time, under relatively stable wind conditions at lower rated speeds, the aeroelastic coupling and pitch-changing action of the blades causes a temporary aeroelastic instability phenomenon in the large impeller unit, which is characterized by the blades vibrating at a certain natural frequency, resulting in a change in the generator speed and The ...

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Problems solved by technology

If this happens frequently, it will cause some damage to the large parts of the unit and reduce the service life

[0003] The existing technical solutions for this problem include: install strain gauges at the roots of the three blades, collect blade root loads in two directions, accumulate data over a period of time, and analyze whether the unit is under specific wind conditions and specific speeds in combination with wind speed and speed. Low-frequency oscillations occur, but the oscillations cannot be identified in real time and intervened

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