SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 57 ›› Issue (5): 151-161.DOI: 10.1016/j.cjche.2022.09.012

• Full Length Article • 上一篇    下一篇

A blast furnace fault monitoring algorithm with low false alarm rate: Ensemble of greedy dynamic principal component analysis-Gaussian mixture model

Xiongzhuo Zhu, Dali Gao, Chong Yang, Chunjie Yang   

  1. State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2022-06-23 修回日期:2022-09-14 出版日期:2023-05-28 发布日期:2023-07-08
  • 通讯作者: Chunjie Yang,E-mail:cjyang999@zju.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (61903326, 61933015).

A blast furnace fault monitoring algorithm with low false alarm rate: Ensemble of greedy dynamic principal component analysis-Gaussian mixture model

Xiongzhuo Zhu, Dali Gao, Chong Yang, Chunjie Yang   

  1. State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2022-06-23 Revised:2022-09-14 Online:2023-05-28 Published:2023-07-08
  • Contact: Chunjie Yang,E-mail:cjyang999@zju.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (61903326, 61933015).

摘要: The large blast furnace is essential equipment in the process of iron and steel manufacturing. Due to the complex operation process and frequent fluctuations of variables, conventional monitoring methods often bring false alarms. To address the above problem, an ensemble of greedy dynamic principal component analysis-Gaussian mixture model (EGDPCA-GMM) is proposed in this paper. First, PCA-GMM is introduced to deal with the collinearity and the non-Gaussian distribution of blast furnace data. Second, in order to explain the dynamics of data, the greedy algorithm is used to determine the extended variables and their corresponding time lags, so as to avoid introducing unnecessary noise. Then the bagging ensemble is adopted to cooperate with greedy extension to eliminate the randomness brought by the greedy algorithm and further reduce the false alarm rate (FAR) of monitoring results. Finally, the algorithm is applied to the blast furnace of a large iron and steel group in South China to verify performance. Compared with the basic algorithms, the proposed method achieves lowest FAR, while keeping missed alarm rate (MAR) remain stable.

关键词: Chemical processes, Principal component analysis, Gaussian mixture model, Process monitoring, Ensemble, Process control

Abstract: The large blast furnace is essential equipment in the process of iron and steel manufacturing. Due to the complex operation process and frequent fluctuations of variables, conventional monitoring methods often bring false alarms. To address the above problem, an ensemble of greedy dynamic principal component analysis-Gaussian mixture model (EGDPCA-GMM) is proposed in this paper. First, PCA-GMM is introduced to deal with the collinearity and the non-Gaussian distribution of blast furnace data. Second, in order to explain the dynamics of data, the greedy algorithm is used to determine the extended variables and their corresponding time lags, so as to avoid introducing unnecessary noise. Then the bagging ensemble is adopted to cooperate with greedy extension to eliminate the randomness brought by the greedy algorithm and further reduce the false alarm rate (FAR) of monitoring results. Finally, the algorithm is applied to the blast furnace of a large iron and steel group in South China to verify performance. Compared with the basic algorithms, the proposed method achieves lowest FAR, while keeping missed alarm rate (MAR) remain stable.

Key words: Chemical processes, Principal component analysis, Gaussian mixture model, Process monitoring, Ensemble, Process control