Research and Application of a Hybrid Wind Energy Forecasting System Based on Data Processing and an Optimized Extreme Learning Machine

Rui Wang, Jingrui Li, Jianzhou Wang and Chengze Gao
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Rui Wang: School of Statistics, Dongbei University of Finance and Economics, Dalian 116025, China
Jingrui Li: School of Accounting, Dongbei University of Finance and Economics, Dalian 116025, China
Jianzhou Wang: School of Statistics, Dongbei University of Finance and Economics, Dalian 116025, China
Chengze Gao: School of Mathematics and Statistics, Lanzhou University, Lanzhou 730000, China

Energies, 2018, vol. 11, issue 7, 1-29

Abstract: Accurate wind speed forecasting plays a significant role for grid operators and the use of wind energy, which helps meet increasing energy needs and improve the energy structure. However, choosing an accurate forecasting system is a challenging task. Many studies have been carried out in recent years, but unfortunately, these studies ignore the importance of data preprocessing and the influence of numerous missing values, leading to poor forecasting performance. In this paper, a hybrid forecasting system based on data preprocessing and an Extreme Learning Machine optimized by the cuckoo algorithm is proposed, which can overcome the limitations of the single ELM model. In the system, the standard genetic algorithm is added to reduce the dimensions of the input and utilize the time series model for error correction by focusing on the optimized extreme learning machine model. And according to screened results, the 5% fractile and 95% fractile are applied to compose the upper and lower bounds of the confidence interval, respectively. The assessment results indicate that the hybrid system successfully overcomes some limitations of the single Extreme Learning Machine model and traditional BP and Mycielski models and can be an effective tool compared to traditional forecasting models.

Keywords: extreme learning machine (ELM); cuckoo search (CS); data preprocessing; hybrid model; Point and interval forecasting (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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