Method and device for predicting wind speed of wind turbine generator system

Abstract

The invention provides a method and device for predicting wind speed of a wind turbine generator system. The method for predicting the wind speed of the wind turbine generator system comprises the following steps that the time difference between the wind speed measurement time of a laser radar and the wind speed measurement time of another wind measuring device of the wind power generator system;first data warehouse separation processing is carried out on the wind speed data measured by the laser radar, and the wind speed data measured by the wind measurement device which is correspondingly matched with the wind speed data of each data warehouse obtained by the first data warehouse separation processing is calculated according to the time difference; the wind speed data measured by the wind measurement device is subjected to secondary data warehouse separation processing, and wind speed prediction is carried out according to the result of the secondary data warehouse separation processing. According to the method and device for predicting the wind speed of the wind turbine generator system, the wind speed of the wind turbine generator system is predicted, and the probability distribution value of the predicted wind speed can be obtained online, so that the online evaluation of the credibility of the predicted wind speed of the wind turbine generator system is realized.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method and device for predicting wind speed of a wind power generating set. Background technique [0002] In recent years, the development of wind power technology has gradually shifted from the expansion of quantity to the pursuit of technological update. Among them, in terms of wind speed measurement of wind turbines, anemometers, wind vanes, microwave radars, sodars and other instruments have appeared successively, but anemometers and wind vanes can only achieve single-point measurement, and such traditional devices are easily affected by freezing weather , microwave radar and sodar are mainly centimeter waves, so there will be detection blind spots under clear sky conditions, and the detection of sodar makes it easy to reduce the signal-to-noise ratio at night and in high-altitude areas, or even impossible to measure. At present, lidar measurement of wind speed as a new...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, although there are many methods of using lidar to predict wind speed, most of them only collect historical data offline, and analyze and statistically process the historical data before they can predict the wind speed and the reliability of the predicted wind speed. To assess the reliability, it is not possible to predict the wind speed online and to evaluate the possibility of the predicted wind speed

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