Characterizing Forecastability of Wind Sites in the United States

Cong Feng, Mucun Sun, Mingjian Cui, Erol Kevin Chartan, Bri Mathias Hodge, Jie Zhang

Research output: Contribution to journalArticlepeer-review

19 Scopus Citations

Abstract

With the rapid growth of wind power, managing its uncertainty and variability becomes critical in power system operations. Wind forecasting is one of the enablers to partially tackle challenges associated with wind power uncertainty. To improve the ‘forecasting ability’ defined as forecastability, different forecasting methods have been developed to assist grid integration of wind energy. However, forecasting performance not only relies on the power of forecasting models, but is also related to local weather conditions and (known as wind characteristics) wind farm properties. In this study, geospatial and instance spatial distributions of six wind characteristics and two forecasting error metrics are first analyzed based on 126,000 + wind sites in the United States. Forecasts in different look-ahead times are generated by using a machine learning based multi-model forecasting framework and the Weather Research and Forecasting model. A forecastability quantification method is developed by characterizing the relationship between forecastability and wind series entropy using three regression methods, i.e., linear approximation, locally weighted scatterplot smoother nonlinear nonparametric regression, and quantile regression. It is found that the forecastability of a wind site can be successfully characterized by wind series characteristics, thereby providing valuable information at different stages of wind energy projects.

Original languageAmerican English
Pages (from-to)1352-1365
Number of pages14
JournalRenewable Energy
Volume133
DOIs
StatePublished - Apr 2019

Bibliographical note

Publisher Copyright:
© 2018 Elsevier Ltd

NREL Publication Number

  • NREL/JA-5D00-72346

Keywords

  • Forecastability
  • Time series analysis
  • Wind power forecasting

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