Active smoothing control method, device and computer equipment for wind turbine output power

Abstract

The present invention relates to the field of electronic technology and discloses a method, device, and computer equipment for active smoothing control of wind turbine output power. The method utilizes a band-stop filter model and information on the wind turbine's machine-side output power variation to determine a desired smoothed power. The band-stop filter coefficient of the band-stop filter model is determined based on information on the DC-side capacitor voltage of the wind turbine, the peak frequency of the wind turbine's output power, and information on the wind turbine's machine-side output power variation. A DC-side voltage reference value is calculated based on the desired smoothed power, the wind turbine's machine-side output power variation, and the DC-side capacitor voltage variation information. The DC-side capacitor voltage variation is adjusted to track the variation reference value through DC bus voltage control, thereby achieving active smoothing control of the output power. The method utilizes the inherent but rarely utilized DC-side capacitor power smoothing capability of the wind turbine to perform active smoothing control of the wind turbine's output power, thereby improving the frequency stability of the power system.

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