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An LSTM based method for stage performance degradation early warning with consideration of time-series information

Author

Listed:
  • Li, Xingshuo
  • Liu, Jinfu
  • Bai, Mingliang
  • Li, Jiajia
  • Li, Xianling
  • Yan, Peigang
  • Yu, Daren

Abstract

Renewable energy accommodation in power grids leads to frequent load changes in power plants. Therefore, an efficient monitoring method is necessary to increase the operational reliability of thermal power plants. As extant methods are only efficient under the stable state and perform poorly in the dynamic operation process, this paper proposes a novel method that comprehensively considers the dynamic properties and feature selection to achieve a sensitive and accurate early warning for stage performance degradation. First, the core demands for an ideal early warning are investigated through an analysis of the traditional method. Based on the findings, a frequent pattern model-based early warning method is proposed. Considering the stage characteristics, the features are determined by the fusion of data and mechanism analysis, and the corresponding model is established using a long short-term memory (LSTM) network. The feasibility and validity of this method are experimentally verified and its detection accuracy exceeds 99%. Furthermore, comparison experiments are conducted from the perspective of model characterization and feature selection. The results highlight the importance of time-series information, given that the features exhibit time-dependent characteristics. Moreover, additional features are not necessarily advantageous and a reasonable balance between effective information input and interference is crucial.

Suggested Citation

  • Li, Xingshuo & Liu, Jinfu & Bai, Mingliang & Li, Jiajia & Li, Xianling & Yan, Peigang & Yu, Daren, 2021. "An LSTM based method for stage performance degradation early warning with consideration of time-series information," Energy, Elsevier, vol. 226(C).
    • Handle: RePEc:eee:energy:v:226:y:2021:i:c:s0360544221006472
    DOI: 10.1016/j.energy.2021.120398
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    References listed on IDEAS

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    1. Cao, Li-hua & Yu, Jing-wen & Li, Yong, 2016. "Study on the determination method of the normal value of relative internal efficiency of the last stage group of steam turbine," Energy, Elsevier, vol. 98(C), pages 101-107.
    2. Hu, Pengfei & Cao, Lihua & Su, Jingkai & Li, Qi & Li, Yong, 2020. "Distribution characteristics of salt-out particles in steam turbine stage," Energy, Elsevier, vol. 192(C).
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    1. Bai, Mingliang & Yang, Xusheng & Liu, Jinfu & Liu, Jiao & Yu, Daren, 2021. "Convolutional neural network-based deep transfer learning for fault detection of gas turbine combustion chambers," Applied Energy, Elsevier, vol. 302(C).
    2. Long, Zhenhua & Bai, Mingliang & Ren, Minghao & Liu, Jinfu & Yu, Daren, 2023. "Fault detection and isolation of aeroengine combustion chamber based on unscented Kalman filter method fusing artificial neural network," Energy, Elsevier, vol. 272(C).
    3. Wang, Pengfei & Zhang, Jiaxuan & Wan, Jiashuang & Wu, Shifa, 2022. "A fault diagnosis method for small pressurized water reactors based on long short-term memory networks," Energy, Elsevier, vol. 239(PC).
    4. Xu, Zifei & Bashir, Musa & Yang, Yang & Wang, Xinyu & Wang, Jin & Ekere, Nduka & Li, Chun, 2022. "Multisensory collaborative damage diagnosis of a 10 MW floating offshore wind turbine tendons using multi-scale convolutional neural network with attention mechanism," Renewable Energy, Elsevier, vol. 199(C), pages 21-34.

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