Power prediction method and device for wind generating set at low wind speed

Abstract

The invention provides a power prediction method and device for a wind generating set at a low wind speed. The power prediction method comprises the following steps: inputting a first power actual value sequence into a first power prediction model so as to predict the first power prediction value sequence through the first power prediction model, the first power actual value sequence being a timesequence of power actual values of the wind generating set within a first predetermined time length before the current moment; predicting a residual value corresponding to each power prediction valuein the first power prediction value sequence through a power residual prediction model, the residual value corresponding to the power prediction value being a difference value between a power actual value at a moment corresponding to the power prediction value and the power prediction value; and adding each power prediction value in the first power prediction value sequence and the corresponding residual value to obtain a power value sequence, and taking the power value sequence as a final predicted power value sequence of the wind generating set.

Description

technical field [0001] The present invention generally relates to the technical field of wind power generation, and more specifically, relates to a power prediction method and equipment of a wind power generating set at a low wind speed. Background technique [0002] With the continuous development of wind resources and the continuous advancement of wind power related technologies, the development of areas rich in wind resources has entered a saturated state, but there are also some problems in areas rich in wind resources, such as wind curtailment, power cuts, and grid connection bottlenecks. As a result, the development of wind resources has gradually shifted to low wind speed areas. [0003] In the field of wind power, low wind speed areas usually refer to areas with annual average wind speeds ranging from 5m / s to 7m / s. Low wind speed has the characteristics of changeable (that is, frequent changes in wind speed and wind direction) and high turbulence intensity, while th...

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Problems solved by technology

Low wind speed has the characteristics of changeable (that is, frequent changes in wind speed and wind direction) and high turbulence intensity, while the power change of wind turbines has a strong correlation with wind speed change. Therefore, when carrying out wind resource development activities in low wind speed areas , there is a technical problem that it is difficult to quickly and accurately predict the power of wind turbines at low wind speeds

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