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Medium–Long-Term PV Output Forecasting Based on the Graph Attention Network with Amplitude-Aware Permutation Entropy

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Listed:
  • Shuyi Shen

    (Economic Research Institute of State Grid Zhejiang Electric Power Company, Hangzhou 310016, China)

  • Yingjing He

    (Economic Research Institute of State Grid Zhejiang Electric Power Company, Hangzhou 310016, China)

  • Gaoxuan Chen

    (School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China)

  • Xu Ding

    (School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China)

  • Lingwei Zheng

    (School of Automation, Hangzhou Dianzi University, Hangzhou 310018, China)

Abstract

Medium–long-term photovoltaic (PV) output forecasting is of great significance to power grid planning, power market transactions, power dispatching operations, equipment maintenance and overhaul. However, PV output fluctuates greatly due to weather changes. Furthermore, it is frequently challenging to ensure the accuracy of forecasts for medium–long-term forecasting involving a long time span. In response to the above problems, this paper proposes a medium–long-term forecasting method for PV output based on amplitude-aware permutation entropy component reconstruction and the graph attention network. Firstly, the PV output sequence data are decomposed by ensemble empirical mode decomposition (EEMD), and the decomposed intrinsic mode function (IMF) subsequences are combined and reconstructed according to the amplitude-aware permutation entropy. Secondly, the graph node feature sequence is constructed from the reconstructed subsequences, and the mutual information of the node feature sequence is calculated to obtain the graph node adjacency matrix which is applied to generate a graph sequence. Thirdly, the graph attention network is utilized to forecast the graph sequence and separate the PV output forecasting results. Finally, an actual measurement system is used to experimentally verify the proposed method, and the outcomes indicate that the proposed method, which has certain promotion value, can improve the accuracy of medium–long-term forecasting of PV output.

Suggested Citation

  • Shuyi Shen & Yingjing He & Gaoxuan Chen & Xu Ding & Lingwei Zheng, 2024. "Medium–Long-Term PV Output Forecasting Based on the Graph Attention Network with Amplitude-Aware Permutation Entropy," Energies, MDPI, vol. 17(16), pages 1-14, August.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:16:p:4187-:d:1461566
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    References listed on IDEAS

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    1. Yang, Mao & Huang, Yutong & Guo, Yunfeng & Zhang, Wei & Wang, Bo, 2024. "Ultra-short-term wind farm cluster power prediction based on FC-GCN and trend-aware switching mechanism," Energy, Elsevier, vol. 290(C).
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