A computational discharge model for sphere–plane long air gap under switching impulse voltage
There are lots of sphere–plane air gaps in valve halls in extra-high-voltage and ultra-high-voltage converter stations. Accurate prediction for discharge characteristics of sphere–plane gaps is of great significance for the selection of shielding structure and determining the dielectric strength of...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2023-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0148740 |
| _version_ | 1797771823355527168 |
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| author | Yaqi Fang Hongxain Tu Lei Jia Enwen Li Lei Liu Guoli Wang Xiaoxing Zhang |
| author_facet | Yaqi Fang Hongxain Tu Lei Jia Enwen Li Lei Liu Guoli Wang Xiaoxing Zhang |
| author_sort | Yaqi Fang |
| collection | DOAJ |
| description | There are lots of sphere–plane air gaps in valve halls in extra-high-voltage and ultra-high-voltage converter stations. Accurate prediction for discharge characteristics of sphere–plane gaps is of great significance for the selection of shielding structure and determining the dielectric strength of the valve hall. In this paper, based on the physical process of corona inception and continuous leader inception, a computational model for calculating the discharge voltage of a sphere–plane air gap under positive switching impulse voltage is proposed, and the leader characteristics and discharge voltage are analyzed. Then, the switching impulse discharge test of the sphere–plane gap with 0.15, 2, and 0.3 m radius spherical electrodes is carried out to verify the correctness of the model. The results show that the discharge voltage calculated by the proposed method is consistent with the test results, and the error is within 7.3%. The leader inception voltage and inception time increase with the increasing spherical electrode radius at the same gap distance, and an identical spherical electrode require higher leader inception voltage and faster leader inception time with the increasing gap distance. |
| first_indexed | 2024-03-12T21:42:07Z |
| format | Article |
| id | doaj.art-310d562619134163a40601e988a1d314 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-12T21:42:07Z |
| publishDate | 2023-05-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-310d562619134163a40601e988a1d3142023-07-26T15:31:54ZengAIP Publishing LLCAIP Advances2158-32262023-05-01135055127055127-910.1063/5.0148740A computational discharge model for sphere–plane long air gap under switching impulse voltageYaqi Fang0Hongxain Tu1Lei Jia2Enwen Li3Lei Liu4Guoli Wang5Xiaoxing Zhang6Hubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment, Hubei University of Technology, Wuhan 430068, ChinaHubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment, Hubei University of Technology, Wuhan 430068, ChinaElectric Power Research Institute, China Southern Power Grid, Guangzhou 510663, ChinaElectric Power Research Institute, China Southern Power Grid, Guangzhou 510663, ChinaElectric Power Research Institute, China Southern Power Grid, Guangzhou 510663, ChinaElectric Power Research Institute, China Southern Power Grid, Guangzhou 510663, ChinaHubei Engineering Research Center for Safety Monitoring of New Energy and Power Grid Equipment, Hubei University of Technology, Wuhan 430068, ChinaThere are lots of sphere–plane air gaps in valve halls in extra-high-voltage and ultra-high-voltage converter stations. Accurate prediction for discharge characteristics of sphere–plane gaps is of great significance for the selection of shielding structure and determining the dielectric strength of the valve hall. In this paper, based on the physical process of corona inception and continuous leader inception, a computational model for calculating the discharge voltage of a sphere–plane air gap under positive switching impulse voltage is proposed, and the leader characteristics and discharge voltage are analyzed. Then, the switching impulse discharge test of the sphere–plane gap with 0.15, 2, and 0.3 m radius spherical electrodes is carried out to verify the correctness of the model. The results show that the discharge voltage calculated by the proposed method is consistent with the test results, and the error is within 7.3%. The leader inception voltage and inception time increase with the increasing spherical electrode radius at the same gap distance, and an identical spherical electrode require higher leader inception voltage and faster leader inception time with the increasing gap distance.http://dx.doi.org/10.1063/5.0148740 |
| spellingShingle | Yaqi Fang Hongxain Tu Lei Jia Enwen Li Lei Liu Guoli Wang Xiaoxing Zhang A computational discharge model for sphere–plane long air gap under switching impulse voltage AIP Advances |
| title | A computational discharge model for sphere–plane long air gap under switching impulse voltage |
| title_full | A computational discharge model for sphere–plane long air gap under switching impulse voltage |
| title_fullStr | A computational discharge model for sphere–plane long air gap under switching impulse voltage |
| title_full_unstemmed | A computational discharge model for sphere–plane long air gap under switching impulse voltage |
| title_short | A computational discharge model for sphere–plane long air gap under switching impulse voltage |
| title_sort | computational discharge model for sphere plane long air gap under switching impulse voltage |
| url | http://dx.doi.org/10.1063/5.0148740 |
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