Experimental Study on Pressure-Deformation-Contact Resistance Characteristics of Converter Transformer Valve Side Casing Louver Contacts
The performance degradation of oil-immersed louver contacts are the main reason for the DC resistance exceeding the standard on the valve side of UHV converter transformers. In this paper, a louver contact performance test platform is designed and built according to the actual assembly structure of...
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| Format: | Article |
| Language: | English |
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IEEE
2025-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10843217/ |
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| author | Shihong Hu Zhicheng Huang Jiahui Chen Chi Yuan Bozhang Feng Tao Zhao Yunpeng Liu |
| author_facet | Shihong Hu Zhicheng Huang Jiahui Chen Chi Yuan Bozhang Feng Tao Zhao Yunpeng Liu |
| author_sort | Shihong Hu |
| collection | DOAJ |
| description | The performance degradation of oil-immersed louver contacts are the main reason for the DC resistance exceeding the standard on the valve side of UHV converter transformers. In this paper, a louver contact performance test platform is designed and built according to the actual assembly structure of the louver contact. The relationships between pressure, deformation and contact resistance of the louver contacts are measured and obtained by utilizing the louver contact test platform. The characteristics between the parameters of contact resistance, pressure and load current are investigated based on the test platform. The results show that the contact resistance decreases exponentially with the increase of the pressure on the louver contacts, and the contact resistance decreases with the increase of load current applied on the louver contacts. At the same time, based on the test results, the change characteristics are analysised of the surface shrinkage resistance and film layer resistance of the contact piece. The obtained conclusions can provide a practical basis for the design of electric contact components of power transformer bushings and fault analysis research. |
| format | Article |
| id | doaj-art-593b325f013e443fb1fb048c38ef9370 |
| institution | Kabale University |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-593b325f013e443fb1fb048c38ef93702025-01-25T00:00:47ZengIEEEIEEE Access2169-35362025-01-0113144441445210.1109/ACCESS.2025.352986910843217Experimental Study on Pressure-Deformation-Contact Resistance Characteristics of Converter Transformer Valve Side Casing Louver ContactsShihong Hu0https://orcid.org/0009-0007-2604-5820Zhicheng Huang1https://orcid.org/0000-0002-9646-2415Jiahui Chen2Chi Yuan3https://orcid.org/0009-0000-9745-2019Bozhang Feng4https://orcid.org/0009-0002-0256-8305Tao Zhao5https://orcid.org/0000-0002-6005-8971Yunpeng Liu6State Grid Sichuan Electric Power Research Institute, Chengdu, ChinaState Grid Sichuan Electric Power Research Institute, Chengdu, ChinaState Grid Sichuan Electric Power Research Institute, Chengdu, ChinaHebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding, ChinaHebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding, ChinaHebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding, ChinaHebei Provincial Key Laboratory of Power Transmission Equipment Security Defense, North China Electric Power University, Baoding, ChinaThe performance degradation of oil-immersed louver contacts are the main reason for the DC resistance exceeding the standard on the valve side of UHV converter transformers. In this paper, a louver contact performance test platform is designed and built according to the actual assembly structure of the louver contact. The relationships between pressure, deformation and contact resistance of the louver contacts are measured and obtained by utilizing the louver contact test platform. The characteristics between the parameters of contact resistance, pressure and load current are investigated based on the test platform. The results show that the contact resistance decreases exponentially with the increase of the pressure on the louver contacts, and the contact resistance decreases with the increase of load current applied on the louver contacts. At the same time, based on the test results, the change characteristics are analysised of the surface shrinkage resistance and film layer resistance of the contact piece. The obtained conclusions can provide a practical basis for the design of electric contact components of power transformer bushings and fault analysis research.https://ieeexplore.ieee.org/document/10843217/Oil-immersed louver contactsdeformationpressurecontact resistance |
| spellingShingle | Shihong Hu Zhicheng Huang Jiahui Chen Chi Yuan Bozhang Feng Tao Zhao Yunpeng Liu Experimental Study on Pressure-Deformation-Contact Resistance Characteristics of Converter Transformer Valve Side Casing Louver Contacts IEEE Access Oil-immersed louver contacts deformation pressure contact resistance |
| title | Experimental Study on Pressure-Deformation-Contact Resistance Characteristics of Converter Transformer Valve Side Casing Louver Contacts |
| title_full | Experimental Study on Pressure-Deformation-Contact Resistance Characteristics of Converter Transformer Valve Side Casing Louver Contacts |
| title_fullStr | Experimental Study on Pressure-Deformation-Contact Resistance Characteristics of Converter Transformer Valve Side Casing Louver Contacts |
| title_full_unstemmed | Experimental Study on Pressure-Deformation-Contact Resistance Characteristics of Converter Transformer Valve Side Casing Louver Contacts |
| title_short | Experimental Study on Pressure-Deformation-Contact Resistance Characteristics of Converter Transformer Valve Side Casing Louver Contacts |
| title_sort | experimental study on pressure deformation contact resistance characteristics of converter transformer valve side casing louver contacts |
| topic | Oil-immersed louver contacts deformation pressure contact resistance |
| url | https://ieeexplore.ieee.org/document/10843217/ |
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