The Effect of Averaging, Sampling, and Time Series Length on Wind Power Density Estimations

Markus Gross, Vanesa Magar and Alfredo Peña
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Markus Gross: CICESE, Carretera Ensenada-Tijuana No. 3918, Zona Playitas, CP. 22860 Ensenada, B.C., Mexico
Vanesa Magar: CICESE, Carretera Ensenada-Tijuana No. 3918, Zona Playitas, CP. 22860 Ensenada, B.C., Mexico
Alfredo Peña: Department of Wind Energy, Technical University of Denmark, Frederiksborgvej 399, 4000 Roskilde, Denmark

Sustainability, 2020, vol. 12, issue 8, 1-13

Abstract: The Wind Power Density (WPD) is widely used for wind resource characterization. However, there is a significant level of uncertainty associated with its estimation. Here, we analyze the effect of sampling frequencies, averaging periods, and the length of time series on the WPD estimation. We perform this analysis using four approaches. First, we analytically evaluate the impact of assuming that the WPD can simply be computed from the cube of the mean wind speed. Second, the wind speed time series from two meteorological stations are used to assess the effect of sampling and averaging on the WPD. Third, we use numerical weather prediction model outputs and observational data to demonstrate that the error in the WPD estimate is also dependent on the length of the time series. Finally, artificial time series are generated to control the characteristics of the wind speed distribution, and we analyze the sensitivity of the WPD to variations of these characteristics. The WPD estimation error is expressed mathematically using a numerical-data-driven model. This numerical-data-driven model can then be used to predict the WPD estimation errors at other sites. We demonstrate that substantial errors can be introduced by choosing too short time series. Furthermore, averaging leads to an underestimation of the WPD. The error introduced by sampling is strongly site-dependent.

Keywords: wind power density; wind speed time series; site characterization; numerical-data-driven model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:12:y:2020:i:8:p:3431-:d:349082

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