Directional and Time-Series Distribution of Projected Wind-Profiles Based on Low-Altitude Data

Abstract

This paper presents a direction-dependent time-series analysis of forecasted wind profiles for the South Asian country of Bangladesh on the basis of a survey conducted by the United Nations. Representative weatherstations are selected from regions of the country with a higher wind potential and directional wind-roses with Weibull density functions are established at a commercial turbine height. As measured data are available only at lower altitudes (10m), time-series distribution of directional profiles is projected for 40m to assess the suitability of specific time intervals for wind power extraction. To improve the accuracy of the estimation process, the effects of wind shear coefficient (power profile rule) and log profile parameters are considered on the vertical distribution of horizontal wind streams (reaching up to 12.5m/s for 40-120m axle heights and 15-80m rotor diameters). This study is intended to assist the evaluation of the prospects of grid-connected or stand-alone wind-turbines, supporting the renewable power sector of the country.

Keywords

• Directional Distribution; Time-Series Analysis; Wind Profile Projection

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