Current-carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas medium
Overheating fault caused by poor contacts of plum blossom contact is one of the typical defects of switchgear and gas insulation combined appliances. The study of current-carrying friction characteristics and remaining life prediction of plum blossom contacts in different gas medium is of great theo...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Power Engineering Technology
2023-11-01
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| Series: | 电力工程技术 |
| Subjects: | |
| Online Access: | https://www.epet-info.com/dlgcjsen/article/abstract/221013433 |
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| author | LIN Rongxing WANG Yangcheng CHEN Zhipeng GUAN Xiangyu LIU Jiang CAI Kaiming |
| author_facet | LIN Rongxing WANG Yangcheng CHEN Zhipeng GUAN Xiangyu LIU Jiang CAI Kaiming |
| author_sort | LIN Rongxing |
| collection | DOAJ |
| description | Overheating fault caused by poor contacts of plum blossom contact is one of the typical defects of switchgear and gas insulation combined appliances. The study of current-carrying friction characteristics and remaining life prediction of plum blossom contacts in different gas medium is of great theoretical and applied significance for the accurate evaluation of the health status of this type of equipment. The test samples are processed according to the real plum blossom contact materials and process. The current-carrying tests in air, N2 and SF6 gas medium are carried out by using a self-built current-carrying table, and the contact resistance degradation curves are obtained. The analysis of the surface morphology of the contact shows that the sample surface shows obvious adhesive wear under the effect of large current and mechanical displacement, the gas medium affects the degradation process of the contact by changing the morphology and element composition of the wear region. The contact resistance failure threshold is determined according to the V-T relationship of the contact. The Savitzky-Golay filter is used to smooth the original curves of the contact resistance. The life of plum blossom contacts in three gas medium is predicted by using Wiener degradation model updated by Bayesian. The results show that the model is more accurate than the conventional Wiener model. The remaining life of the plum blossom contact in the air is 9 500 cycles. The life of the plum blossom contact in N2 is 61 300 cycles. The life of the plum blossom contact in SF6 is 32 200 cycles. |
| first_indexed | 2024-03-09T03:11:56Z |
| format | Article |
| id | doaj.art-6e747ac0f3a34204ab786126768ecf6e |
| institution | Directory Open Access Journal |
| issn | 2096-3203 |
| language | zho |
| last_indexed | 2024-03-09T03:11:56Z |
| publishDate | 2023-11-01 |
| publisher | Editorial Department of Electric Power Engineering Technology |
| record_format | Article |
| series | 电力工程技术 |
| spelling | doaj.art-6e747ac0f3a34204ab786126768ecf6e2023-12-04T00:44:16ZzhoEditorial Department of Electric Power Engineering Technology电力工程技术2096-32032023-11-0142619720510.12158/j.2096-3203.2023.06.021221013433Current-carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas mediumLIN Rongxing0WANG Yangcheng1CHEN Zhipeng2GUAN Xiangyu3LIU Jiang4CAI Kaiming5College of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, ChinaCollege of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, ChinaCollege of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, ChinaCollege of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, ChinaCollege of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, ChinaCollege of Electrical Engineering and Automation, Fuzhou University, Fuzhou 350108, ChinaOverheating fault caused by poor contacts of plum blossom contact is one of the typical defects of switchgear and gas insulation combined appliances. The study of current-carrying friction characteristics and remaining life prediction of plum blossom contacts in different gas medium is of great theoretical and applied significance for the accurate evaluation of the health status of this type of equipment. The test samples are processed according to the real plum blossom contact materials and process. The current-carrying tests in air, N2 and SF6 gas medium are carried out by using a self-built current-carrying table, and the contact resistance degradation curves are obtained. The analysis of the surface morphology of the contact shows that the sample surface shows obvious adhesive wear under the effect of large current and mechanical displacement, the gas medium affects the degradation process of the contact by changing the morphology and element composition of the wear region. The contact resistance failure threshold is determined according to the V-T relationship of the contact. The Savitzky-Golay filter is used to smooth the original curves of the contact resistance. The life of plum blossom contacts in three gas medium is predicted by using Wiener degradation model updated by Bayesian. The results show that the model is more accurate than the conventional Wiener model. The remaining life of the plum blossom contact in the air is 9 500 cycles. The life of the plum blossom contact in N2 is 61 300 cycles. The life of the plum blossom contact in SF6 is 32 200 cycles.https://www.epet-info.com/dlgcjsen/article/abstract/221013433plum blossom contactgas mediumcurrent-carrying frictiondegradation curvessurface morphologyfailure preiction |
| spellingShingle | LIN Rongxing WANG Yangcheng CHEN Zhipeng GUAN Xiangyu LIU Jiang CAI Kaiming Current-carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas medium 电力工程技术 plum blossom contact gas medium current-carrying friction degradation curves surface morphology failure preiction |
| title | Current-carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas medium |
| title_full | Current-carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas medium |
| title_fullStr | Current-carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas medium |
| title_full_unstemmed | Current-carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas medium |
| title_short | Current-carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas medium |
| title_sort | current carrying friction characteristics and electrical contact life prediction of plum blossom contacts under the influence of gas medium |
| topic | plum blossom contact gas medium current-carrying friction degradation curves surface morphology failure preiction |
| url | https://www.epet-info.com/dlgcjsen/article/abstract/221013433 |
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