Fig. 1. Schematic of lidar measuring wind speed

Fig. 2. Schematic of measuring device

Fig. 3. Training wind speed sequence at 100 m in front of the hub

Fig. 4. Training wind speed sequence at 50 m in front of the hub

Fig. 5. First-order differential preprocessing results of wind speed

Fig. 6. Autocorrelation graph

Fig. 7. Partial autocorrelation diagram

Fig. 8. Measured wind speed sequence at 100 m in front of the hub

Fig. 9. Comparison of model output wind speed and measured wind speed at 50 m in front of the hub

Fig. 10. Fitting of wind speed test data at 50 m in front of the hub

Fig. 11. Comparison of predicted wind speed and estimated wind speed at the hub. (a) Overall comparison graph; (b) local comparison graph