High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correction
Abstract Air gap impulse discharge characteristics of railway tunnel‐catenary at high‐altitude are of great significance to the electrical insulation design. The existing altitude correction methods for non‐uniform air gaps are not applicable to tunnel‐catenary. To investigate the impulse discharge...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-12-01
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| Series: | High Voltage |
| Online Access: | https://doi.org/10.1049/hve2.12337 |
| _version_ | 1797378763633197056 |
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| author | Yi Liao Xingliang Jiang Guolin Yang Jianlin Hu Zhijin Zhang Qin Hu Chen Tan Haitao Wu |
| author_facet | Yi Liao Xingliang Jiang Guolin Yang Jianlin Hu Zhijin Zhang Qin Hu Chen Tan Haitao Wu |
| author_sort | Yi Liao |
| collection | DOAJ |
| description | Abstract Air gap impulse discharge characteristics of railway tunnel‐catenary at high‐altitude are of great significance to the electrical insulation design. The existing altitude correction methods for non‐uniform air gaps are not applicable to tunnel‐catenary. To investigate the impulse discharge characteristics of the tunnel‐catenary, a typical structural model was built in an artificial climate chamber. Different altitudes were simulated by adjusting the atmospheric pressure. The 50% breakdown voltages of the 300–700 mm tunnel‐catenary gap were tested at 243–4000 m. The test found that the altitude/atmospheric pressure and gap length have an evident effect on the 50% impulse breakdown voltage, and the influence of humidity is relatively small. The polarity effect was analysed by streamer theory. The {d, P, h} parameter method was employed to obtain the fitting formulas for the impulse breakdown voltage. A high‐altitude correction method for the tunnel‐catenary breakdown voltage based on 1 km altitude was proposed. Field natural tests were conducted to verify the accuracy of the proposed method. The results show that the breakdown voltage obtained by the correction method has an average error of 3.66% in the results of the field tests, indicating that the method has engineering application prospects. |
| first_indexed | 2024-03-08T20:12:24Z |
| format | Article |
| id | doaj.art-c04d39f52b234df387c7051c6eaa15b5 |
| institution | Directory Open Access Journal |
| issn | 2397-7264 |
| language | English |
| last_indexed | 2024-03-08T20:12:24Z |
| publishDate | 2023-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | High Voltage |
| spelling | doaj.art-c04d39f52b234df387c7051c6eaa15b52023-12-23T04:49:06ZengWileyHigh Voltage2397-72642023-12-01861285129510.1049/hve2.12337High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correctionYi Liao0Xingliang Jiang1Guolin Yang2Jianlin Hu3Zhijin Zhang4Qin Hu5Chen Tan6Haitao Wu7Xuefeng Mountain Energy Equipment Safety National Observation and Research Station of Chongqing University Chongqing ChinaXuefeng Mountain Energy Equipment Safety National Observation and Research Station of Chongqing University Chongqing ChinaXuefeng Mountain Energy Equipment Safety National Observation and Research Station of Chongqing University Chongqing ChinaXuefeng Mountain Energy Equipment Safety National Observation and Research Station of Chongqing University Chongqing ChinaXuefeng Mountain Energy Equipment Safety National Observation and Research Station of Chongqing University Chongqing ChinaXuefeng Mountain Energy Equipment Safety National Observation and Research Station of Chongqing University Chongqing ChinaState Grid Chengdu Power Supply Company Chengdu ChinaState Grid Chongqing Electric Power Research Institute Chongqing ChinaAbstract Air gap impulse discharge characteristics of railway tunnel‐catenary at high‐altitude are of great significance to the electrical insulation design. The existing altitude correction methods for non‐uniform air gaps are not applicable to tunnel‐catenary. To investigate the impulse discharge characteristics of the tunnel‐catenary, a typical structural model was built in an artificial climate chamber. Different altitudes were simulated by adjusting the atmospheric pressure. The 50% breakdown voltages of the 300–700 mm tunnel‐catenary gap were tested at 243–4000 m. The test found that the altitude/atmospheric pressure and gap length have an evident effect on the 50% impulse breakdown voltage, and the influence of humidity is relatively small. The polarity effect was analysed by streamer theory. The {d, P, h} parameter method was employed to obtain the fitting formulas for the impulse breakdown voltage. A high‐altitude correction method for the tunnel‐catenary breakdown voltage based on 1 km altitude was proposed. Field natural tests were conducted to verify the accuracy of the proposed method. The results show that the breakdown voltage obtained by the correction method has an average error of 3.66% in the results of the field tests, indicating that the method has engineering application prospects.https://doi.org/10.1049/hve2.12337 |
| spellingShingle | Yi Liao Xingliang Jiang Guolin Yang Jianlin Hu Zhijin Zhang Qin Hu Chen Tan Haitao Wu High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correction High Voltage |
| title | High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correction |
| title_full | High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correction |
| title_fullStr | High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correction |
| title_full_unstemmed | High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correction |
| title_short | High‐altitude tunnel‐catenary gap impulse discharge characteristics and breakdown voltage correction |
| title_sort | high altitude tunnel catenary gap impulse discharge characteristics and breakdown voltage correction |
| url | https://doi.org/10.1049/hve2.12337 |
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