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Energies 2018, 11(4), 854; https://doi.org/10.3390/en11040854

Short-Term Wind Power Forecasting Based on Clustering Pre-Calculated CFD Method

1
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Changping District, Beijing 102206, China
2
Department of Electronic and Electrical Engineering, University of Strathclyde, Glasgow G1 1XW, UK
*
Authors to whom correspondence should be addressed.
Received: 29 January 2018 / Revised: 1 April 2018 / Accepted: 3 April 2018 / Published: 5 April 2018
(This article belongs to the Section Electrical Power and Energy System)
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Abstract

To meet the increasing wind power forecasting (WPF) demands of newly built wind farms without historical data, physical WPF methods are widely used. The computational fluid dynamics (CFD) pre-calculated flow fields (CPFF)-based WPF is a promising physical approach, which can balance well the competing demands of computational efficiency and accuracy. To enhance its adaptability for wind farms in complex terrain, a WPF method combining wind turbine clustering with CPFF is first proposed where the wind turbines in the wind farm are clustered and a forecasting is undertaken for each cluster. K-means, hierarchical agglomerative and spectral analysis methods are used to establish the wind turbine clustering models. The Silhouette Coefficient, Calinski-Harabaz index and within-between index are proposed as criteria to evaluate the effectiveness of the established clustering models. Based on different clustering methods and schemes, various clustering databases are built for clustering pre-calculated CFD (CPCC)-based short-term WPF. For the wind farm case studied, clustering evaluation criteria show that hierarchical agglomerative clustering has reasonable results, spectral clustering is better and K-means gives the best performance. The WPF results produced by different clustering databases also prove the effectiveness of the three evaluation criteria in turn. The newly developed CPCC model has a much higher WPF accuracy than the CPFF model without using clustering techniques, both on temporal and spatial scales. The research provides supports for both the development and improvement of short-term physical WPF systems. View Full-Text
Keywords: wind turbine; clustering model; computational fluid dynamics (CFD) pre-calculated database; wind power forecasting wind turbine; clustering model; computational fluid dynamics (CFD) pre-calculated database; wind power forecasting
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Wang, Y.; Liu, Y.; Li, L.; Infield, D.; Han, S. Short-Term Wind Power Forecasting Based on Clustering Pre-Calculated CFD Method. Energies 2018, 11, 854.

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