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Variable-Weighted Ensemble Forecasting of Short-Term Power Load Based on Factor Space Theory

Author

Listed:
  • Yundong Gu

    (North China Electric Power University)

  • Dongfen Ma

    (Xinjiang University of Science and Technology)

  • Jiawei Cui

    (North China Electric Power University)

  • Zhenhua Li

    (North China Electric Power University)

  • Yaqi Chen

    (North China Electric Power University)

Abstract

The power load forecasting plays an important role in the economical and safe operation of the modern power system. However, the characteristics of power load such as non-stationarity, nonlinearity, and multiple quasi-periodicities make power load forecasting a challenging task. The present work focuses on developing a multi-model ensemble forecasting strategy by using prediction phase space construction, similar scenario improved support vector machine, and variable-weighted ensemble method, based on the Factor Space Theory. Firstly, the concept of “Prediction Scenario” is proposed to describe the “Internal historical facts in time series form” and the “External space–time environment composed of external influence factors” of power load forecasting. Next, the candidate input features for power load forecasting are selected based on the correlation analysis between the power load to be predicted, its historical load, and external influence factors. Then, based on the Factor Space Theory, the feature description of the “Prediction Scenarios” is studied and a series of prediction phase space are constructed by randomly selecting some strongly correlated features. An improved support vector machine is proposed based on similar historical scenario screening to set up the unit prediction sub models in each corresponding prediction phase space. The performance of these models is tested by simulation experiments and the variable weight of each model is designed based on the results. Finally, the power loads are forecasted by variable weighted ensemble of multiple models in different prediction phase spaces. The results of mid-Atlantic region load forecasting analysis suggest that the proposed method has better performance in almost cases, comparing with Support Vector Machine, Recurrent Neural Network, Self-partitioning Local Neuro Fuzzy method, Random Forest, Ensemble Neuro-fuzzy method and other state of art forecasting methods.

Suggested Citation

  • Yundong Gu & Dongfen Ma & Jiawei Cui & Zhenhua Li & Yaqi Chen, 2022. "Variable-Weighted Ensemble Forecasting of Short-Term Power Load Based on Factor Space Theory," Annals of Data Science, Springer, vol. 9(3), pages 485-501, June.
    • Handle: RePEc:spr:aodasc:v:9:y:2022:i:3:d:10.1007_s40745-022-00398-5
    DOI: 10.1007/s40745-022-00398-5
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    References listed on IDEAS

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