Abstract Details
41 / 2024-03-29 16:48:18
Prediction of Lightning Impulse Voltage Induced Breakdown in Contact Gap of Vacuum Interrupters
prediction of breakdown voltage, lightning impulse voltage, vacuum interrupter, contact gap, anode temperature
Final Paper
Breakdown voltages of contact gaps are important for the design of vacuum interrupters, especially for high voltage vacuum interrupters. In order to increase the accuracy for insulation design of the vacuum interrupter, breakdown voltage should be predicted to determine the contact gap. The breakdown theory of contact gap in vacuum was unclear. Furthermore, the breakdown of contact gap in vacuum was influenced by many complex factors. By analyses the process and characteristics of the breakdown in contact gap, we proposed a hypothesis that the maximum temperatures were equal at breakdown moment for two anodes which had identical materials and production processes. Base on this hypothesis, we established an expression to associate the breakdown voltage of a contact gap at two different gap distances. We designed a special vacuum interrupter to measure the breakdown voltage for the contact gap at different gap distances. Negative polarity lightning impulse voltage (1.2×50 μs
) was applied by an up-and-down method. Moreover, the 50% breakdown voltage was used to represent the breakdown voltage. The measured U50 were used to calculate and verify the breakdown voltage of the contact gap. Experiment results proved that the U50 from this prediction method was very closed to the U50 from measurement. The relative error of the calculated U50 from this prediction method didn’t exceed 6% when the difference between two contact gap distances was small than 3.5 times. Furthermore, the relative error of U50 from this prediction method was much less than relative error of U50 from Slade’s prediction method. So that the prediction method is useful for vacuum interrupter design.
) was applied by an up-and-down method. Moreover, the 50% breakdown voltage was used to represent the breakdown voltage. The measured U50 were used to calculate and verify the breakdown voltage of the contact gap. Experiment results proved that the U50 from this prediction method was very closed to the U50 from measurement. The relative error of the calculated U50 from this prediction method didn’t exceed 6% when the difference between two contact gap distances was small than 3.5 times. Furthermore, the relative error of U50 from this prediction method was much less than relative error of U50 from Slade’s prediction method. So that the prediction method is useful for vacuum interrupter design. Important Date
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Conference Date
Nov 10
2024
toNov 13
2024
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Nov 11 2024
Draft paper submission deadline
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Nov 19 2024
Registration deadline
Sponsored By
Xi’an Jiaotong Universit
Contact Information
Previous Conferences
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2022-11-24 Bangladesh Dhaka
2022 International Conference on Energy and Power Engineering -
2019-03-14 Bangladesh
2019 International Conference on Energy and Power Engineering
