Impeller surface equivalent wind speed prediction method of large-scale wind turbine generator

Abstract

The invention provides an impeller surface equivalent wind speed prediction method of an impeller surface of a large-scale wind turbine generator. The method comprises the following steps: step 1, measuring wind speed of each height of a virtual impeller surface in front of the wind turbine generator through a laser radar; step 2, calculating the equivalent wind speed of the virtual impeller surface according to the measured wind speed data of each height of the virtual impeller surface; step 3, acquiring an actual impeller surface equivalent wind speed by utilizing the wind turbine generatormodel and sensor measurement data; and step 4, inputting the calculated equivalent wind speed of the virtual impeller surface into a BP neural network after passing through a time shifting model. Themethod adopts the laser radar for wind measurement, the accuracy is high, power loss caused by wind measurement lag is eliminated, the equivalent wind speed of the impeller surface can be accurately predicted, and therefore the design of an advanced prediction control strategy of the wind turbine generator set is more effectively served, and reliable input is provided for advanced prediction control of the large-scale wind turbine generator set.

Description

technical field [0001] The invention relates to the technical field of forecasting the equivalent wind speed of the impeller surface, in particular to a method for predicting the equivalent wind speed of the impeller surface of a large-scale wind turbine. Background technique [0002] In wind power generation, the utilization of wind energy depends on whether the wind turbines can be tracked quickly and accurately. The large moment of inertia of the impeller of a large wind turbine makes it difficult for the speed of the impeller to track the rapidly changing wind conditions in real time. With the increasing maturity of lidar wind measurement technology, the lidar wind measurement system provides a new technical means for the advance measurement of wind information. Based on the preview information of wind speed and wind direction, advanced nonlinear predictive control strategy can be designed, so as to make advance control and adjustment of wind turbines and improve the co...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for predicting the equivalent wind speed of the impeller surface of a large-scale wind turbine, and its purpose is to solve the problem that the future information of the equivalent wind speed of the impeller surface is inaccurate and cannot provide reliable input for the advanced predictive control of the large-scale wind turbine

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