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

A wind turbine, operation control technology, applied in the direction of engine control, wind engine control, wind power generation, etc., can solve the problems of large component damage, reduced service life, and inability to identify oscillations in real time, so as to avoid fatigue damage and improve The effect of safe operation and accurate fitting results

Active Publication Date: 2021-10-29
HUANENG CLEAN ENERGY RES INST
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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 directi

Method used

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

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[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, which are explained by the present invention and not limiting.

[0030] The operation control method of wind power unit based on the PRONY algorithm of the present invention includes the following steps:

[0031] S1: After filtering the running parameter signal, obtain the filtering running parameter signal after filtering; the operating parameter signal can be a generator rotation, power, pitch angle or a paddle rate. Filtering processing includes low pass filtering processing and notch filtering.

[0032] S2: Using the PRONY algorithm to approximate the filtered operating parameter signal into a model with a generator speed oscillation amplitude, generator speed oscillation frequency, generator speed oscillator phase, and generator rotational speed oscillator attenuation factor. Model, The convergence target is a minimum of the error, the minimum, an...

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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 ...

Claims

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Application Information

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IPC IPC(8): F03D7/04
CPCF03D7/043F03D7/044F03D7/0264F03D7/0224F03D7/0276F05B2270/327F05B2270/328F05B2270/335Y02E10/72
Inventor 金强蔡安民林伟荣焦冲张俊杰
Owner HUANENG CLEAN ENERGY RES INST
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