Research on the electric life evaluation technology of the arc extinguishing chamber of the 550 kV circuit breaker
When the circuit breaker is switched on and off, the phenomenon of arc ablation will occur. Under the action of the electric arc, the surface of the contact is constantly damaged, resulting in deformation and material evaporation. With the increase in the electric arc temperature, the material loss...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2022-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0084883 |
| _version_ | 1811249361865146368 |
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| author | Xiaopo Mao Yaodong Zhang Suge Tu Bin Xiang |
| author_facet | Xiaopo Mao Yaodong Zhang Suge Tu Bin Xiang |
| author_sort | Xiaopo Mao |
| collection | DOAJ |
| description | When the circuit breaker is switched on and off, the phenomenon of arc ablation will occur. Under the action of the electric arc, the surface of the contact is constantly damaged, resulting in deformation and material evaporation. With the increase in the electric arc temperature, the material loss on the contact surface of the circuit breaker increases. In this paper, according to the three major factors affecting the electrical life of the circuit breaker arc extinguishing chamber—the state of the arc contact, the nozzle, and the SF6 gas—the corresponding test detection methods and evaluation methods are proposed. With the continuous accumulation of the breaking current, the effective contact displacement between the arc contacts decreases and the average contact resistance increases. The effective contact displacement decreases exponentially with the increase in the cumulative breaking energy. The content of CF4 can be used not only to characterize the discharge ablation on the surface of the nozzle insulating material but also to characterize the discharge decomposition degree of SF6 in the system by adding carbonaceous compounds. Through the experiment, it is suggested that CF4 should reach 600 µl/l as the threshold for judging whether the arc extinguishing chamber needs maintenance. This method can be extended to the working condition evaluation of the arc extinguishing chamber of other types of the SF6 circuit breaker. |
| first_indexed | 2024-04-12T15:45:11Z |
| format | Article |
| id | doaj.art-2fb48453605f46e0b954356f6f2a7140 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-12T15:45:11Z |
| publishDate | 2022-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-2fb48453605f46e0b954356f6f2a71402022-12-22T03:26:40ZengAIP Publishing LLCAIP Advances2158-32262022-05-01125055212055212-810.1063/5.0084883Research on the electric life evaluation technology of the arc extinguishing chamber of the 550 kV circuit breakerXiaopo Mao0Yaodong Zhang1Suge Tu2Bin Xiang3State Grid Hubei Electric Power Co., Ltd., Electric Power Research Institute, Wuhan, Hubei 430077, ChinaState Grid Hubei Electric Power Co., Ltd., Electric Power Research Institute, Wuhan, Hubei 430077, ChinaState Grid Hubei Transmission and Transformation Engineering Co., Ltd., Wuhan, Hubei 430077, ChinaState Grid Hubei Electric Power Co., Ltd., Electric Power Research Institute, Wuhan, Hubei 430077, ChinaWhen the circuit breaker is switched on and off, the phenomenon of arc ablation will occur. Under the action of the electric arc, the surface of the contact is constantly damaged, resulting in deformation and material evaporation. With the increase in the electric arc temperature, the material loss on the contact surface of the circuit breaker increases. In this paper, according to the three major factors affecting the electrical life of the circuit breaker arc extinguishing chamber—the state of the arc contact, the nozzle, and the SF6 gas—the corresponding test detection methods and evaluation methods are proposed. With the continuous accumulation of the breaking current, the effective contact displacement between the arc contacts decreases and the average contact resistance increases. The effective contact displacement decreases exponentially with the increase in the cumulative breaking energy. The content of CF4 can be used not only to characterize the discharge ablation on the surface of the nozzle insulating material but also to characterize the discharge decomposition degree of SF6 in the system by adding carbonaceous compounds. Through the experiment, it is suggested that CF4 should reach 600 µl/l as the threshold for judging whether the arc extinguishing chamber needs maintenance. This method can be extended to the working condition evaluation of the arc extinguishing chamber of other types of the SF6 circuit breaker.http://dx.doi.org/10.1063/5.0084883 |
| spellingShingle | Xiaopo Mao Yaodong Zhang Suge Tu Bin Xiang Research on the electric life evaluation technology of the arc extinguishing chamber of the 550 kV circuit breaker AIP Advances |
| title | Research on the electric life evaluation technology of the arc extinguishing chamber of the 550 kV circuit breaker |
| title_full | Research on the electric life evaluation technology of the arc extinguishing chamber of the 550 kV circuit breaker |
| title_fullStr | Research on the electric life evaluation technology of the arc extinguishing chamber of the 550 kV circuit breaker |
| title_full_unstemmed | Research on the electric life evaluation technology of the arc extinguishing chamber of the 550 kV circuit breaker |
| title_short | Research on the electric life evaluation technology of the arc extinguishing chamber of the 550 kV circuit breaker |
| title_sort | research on the electric life evaluation technology of the arc extinguishing chamber of the 550 kv circuit breaker |
| url | http://dx.doi.org/10.1063/5.0084883 |
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