Noise Impact of Wind Farms: Uncertainties due to wind data reference at 10m

Abstract

Noise impact prediction or measurement of wind farms requires wind reference data at 10 meters. From data collected on more than 200 farms in France, over the last 5 years, this paper shows that, in the sampling of noise and meteorological data for noise prediction and assessment, differences in the wind profile from one site to another, in the period of the day (day, night) can lead to different estimations of emission data selection and impact assessment. Different parameter studies are presented both with regard to the effect on impact studies and farms impact monitoring and control. The work presented is in accordance with the project of acoustic standard for the assessment of noise impact of wind farms under study in France. Method 1 : Pelec V H Calculation Vs standard (10m / 0.05m) Calculation with real wind profile Method 2 : Measurement V h H h LW / réf standard (10m / 0.05m) Measurement Lp dB Method 1 : Pelec V H Calculation Vs standard (10m / 0.05m) Method 1 : Pelec V H Calculation Vs standard (10m / 0.05m) Calculation with real wind profile Method 2 : Measurement V h Calculation with real wind profile Method 2 : Measurement V h