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A Permutation Importance-Based Feature Selection Method for Short-Term Electricity Load Forecasting Using Random Forest

Author

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  • Nantian Huang

    (School of Electrical Engineering, Northeast Dianli University, Jilin 132012, China)

  • Guobo Lu

    (School of Electrical Engineering, Northeast Dianli University, Jilin 132012, China)

  • Dianguo Xu

    (Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China)

Abstract

The prediction accuracy of short-term load forecast (STLF) depends on prediction model choice and feature selection result. In this paper, a novel random forest (RF)-based feature selection method for STLF is proposed. First, 243 related features were extracted from historical load data and the time information of prediction points to form the original feature set. Subsequently, the original feature set was used to train an RF as the original model. After the training process, the prediction error of the original model on the test set was recorded and the permutation importance (PI) value of each feature was obtained. Then, an improved sequential backward search method was used to select the optimal forecasting feature subset based on the PI value of each feature. Finally, the optimal forecasting feature subset was used to train a new RF model as the final prediction model. Experiments showed that the prediction accuracy of RF trained by the optimal forecasting feature subset was higher than that of the original model and comparative models based on support vector regression and artificial neural network.

Suggested Citation

  • Nantian Huang & Guobo Lu & Dianguo Xu, 2016. "A Permutation Importance-Based Feature Selection Method for Short-Term Electricity Load Forecasting Using Random Forest," Energies, MDPI, vol. 9(10), pages 1-24, September.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:10:p:767-:d:78664
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    References listed on IDEAS

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