Title:
FAULT DIAGNOSIS METHOD AND SYSTEM BASED ON QUALITATIVE TREND ANALYSIS AND FIVE-STATE BAYESIAN NETWORK, AND DEVICE AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2023/071220
Kind Code:
A1
Abstract:
A fault diagnosis method based on qualitative trend analysis and a five-state Bayesian network. The method comprises: sorting multi-variable time sequence data into multi-variable time window data; searching for an optimal segmentation point by means of the multi-variable time window data, so as to acquire two linear segments, and describing the linear segments by using five trend states; constructing a variable causal relationship network, constructing a five-state Bayesian network according to the variable causal relationship network, and calculating conditional probability information between node states in the five-state Bayesian network; and diagnosing an actual trend state of variables by using the conditional probability information, and acquiring a fault generation reason and a fault propagation route.
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Inventors:
WU HAO (CN)
REN XIN (CN)
WU QING (CN)
ZHU JINTAO (CN)
LV LIANG (CN)
ZHU JUNJIE (CN)
REN XIN (CN)
WU QING (CN)
ZHU JINTAO (CN)
LV LIANG (CN)
ZHU JUNJIE (CN)
Application Number:
PCT/CN2022/098676
Publication Date:
May 04, 2023
Filing Date:
June 14, 2022
Export Citation:
Assignee:
HUANENG CLEAN ENERGY RES INST (CN)
International Classes:
G06K9/62
Foreign References:
| CN113988173A | 2022-01-28 | |||
| CN111255674A | 2020-06-09 | |||
| US6076083A | 2000-06-13 |
Other References:
"Doctoral Dissertation", 1 June 2018, NORTH CHINA ELECTRIC POWER UNIVERSITY (BEIJING), CN, article CHEN, DONGCHAO: "Fault Diagnosis Method and Application Research of Turbogenerator Based on Bayesian Network", pages: 1 - 155, XP009545246
"Master's Thesis", 23 March 2018, UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY, CN, article LYU, YUHONG: "Research and Application of Time Series Anomaly Detection Algorithm", pages: 1 - 65, XP009545244
LU NINGYUN, HE KELEI, JIANG BIN, LÜ JIANHUA: "A fault prognosis method using Bayesian network", JOURNAL OF SOUTHEAST UNIVERSITY (NATURAL SCIENCE EDITION ), DONGNAN DAXUE, NANJING, CN, vol. 42, no. S1, 30 September 2012 (2012-09-30), CN , pages 87 - 91, XP009545766, ISSN: 1001-0505, DOI: 10.3969/j.issn.1001-0505.2012.S1.019
"Master's Thesis", 23 March 2018, UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY, CN, article LYU, YUHONG: "Research and Application of Time Series Anomaly Detection Algorithm", pages: 1 - 65, XP009545244
LU NINGYUN, HE KELEI, JIANG BIN, LÜ JIANHUA: "A fault prognosis method using Bayesian network", JOURNAL OF SOUTHEAST UNIVERSITY (NATURAL SCIENCE EDITION ), DONGNAN DAXUE, NANJING, CN, vol. 42, no. S1, 30 September 2012 (2012-09-30), CN , pages 87 - 91, XP009545766, ISSN: 1001-0505, DOI: 10.3969/j.issn.1001-0505.2012.S1.019
Attorney, Agent or Firm:
TSINGYIHUA INTELLECTUAL PROPERTY LLC (CN)
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