Ultra-Short-Term Interval Prediction of Wind Power Based on Graph Neural Network and Improved Bootstrap Technique

Wenlong Liao, Shouxiang Wang, Birgitte Bak-Jensen, Jayakrishnan Radhakrishna Pillai, Zhe Yang*, Kuangpu Liu

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

34 Citations (Scopus)
36 Downloads (Pure)

Abstract

Reliable and accurate ultra-short-term prediction of wind power is vital for the operation and optimization of power systems. However, the volatility and intermittence of wind power pose uncertainties to traditional point prediction, resulting in an increased risk of power system operation. To represent the uncertainty of wind power, this paper proposes a new method for ultra-short-term interval prediction of wind power based on a graph neural network (GNN) and an improved Bootstrap technique. Specifically, adjacent wind farms and local meteorological factors are modeled as the new form of a graph from the graph-theoretic perspective. Then, the graph convolutional network (GCN) and bi-directional long short-term memory (Bi-LSTM) are proposed to capture spatio-temporal features between nodes in the graph. To obtain high-quality prediction intervals (PIs), an improved Bootstrap technique is designed to increase coverage percentage and narrow PIs effectively. Numerical simulations demonstrate that the proposed method can capture the spatiotemporal correlations from the graph, and the prediction results outperform popular baselines on two real-world datasets, which implies a high potential for practical applications in power systems.

Original languageEnglish
JournalJournal of Modern Power Systems and Clean Energy
Volume11
Issue number4
Pages (from-to)1100-1114
Number of pages15
ISSN2196-5625
DOIs
Publication statusPublished - 1 Jul 2023

Keywords

  • Bidirectional long short-term memory (Bi-LSTM)
  • Graph Neural Networks
  • Prediction interval
  • Wind Power

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