文献类型：期刊文献

英文题名：Propagation Analysis of Plant-Wide Oscillations Using Partial Directed Coherence

作者：Zhang, Liang[1];Zheng, Jianrong[1];Xia, Chunming[1]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：48

期号：9

起止页码：766

外文期刊名：JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

收录：;EI(收录号：20153901301055);WOS:【SCI-EXPANDED(收录号:WOS:000362683100005)】；

基金：This work was supported by the National Natural Science Foundation of China (60974061).

语种：英文

外文关键词：Multi-Loop System; Plant-Wide Oscillation; Spectral Independent Component Analysis; Partial Directed Coherence (PDC); Root-Cause Locating

摘要：This paper proposes a novel method for diagnosing the sources and propagation paths of plant-wide oscillations. The main oscillatory process loop variables and dominant oscillation frequency of the process loop variables were automatically selected based on a spectral independent component analysis algorithm. The complex causality among the selected oscillatory process variables was then revealed by partial directed coherence whose magnitude at the dominant oscillation frequency represented the intensity of the influence among the process variables and was visualized in the form of a causality diagram. The location of the oscillation disturbance was identified intuitively through the final causality diagram. Simulations and an industrial case study demonstrated the effectiveness and applicability of the proposed procedure.