Abstract
Experimental data on the propagation of streamers in mineral oil is important for the design of high-voltage systems in the power and pulsed-power industries. In the present study, prebreakdown delay times were measured for plane-parallel electrodes, and for two types of non-uniform electrode arrangement. For each geometry, the breakdown characteristics were determined for impulses of rise-time 100 ns, and also risetime 1 μs. The maximum applied voltage magnitude was 400 kV, giving a maximum dV/dt of 4 kV/ns. For the non-uniform geometries with inter-electrode gap length of 8.5 mm, the time to breakdown was 2.5-3 times longer for impulses of rise-time 1 μs than for 100 ns rise-time. The time-to-breakdown data suggest that streamer propagation velocity increases with higher values of dV/dt. For example, the estimated propagation velocity for pin-plane geometry with a 1 μs rise-time is 10-12 km/s. At 100 ns rise-time for the same electrode geometry, the average propagation velocity exceeds 40 km/s. The results presented are intended to provide reference data for designers of oil-immersed high-voltage systems in both the power and pulsed-power industries.
Original language | English |
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Title of host publication | Proceedings of the 17th IEEE international conference on dielectric liquids |
Place of Publication | New York |
Publisher | IEEE |
Number of pages | 4 |
ISBN (Print) | 9781424473526 |
DOIs | |
Publication status | Published - 2011 |
Event | IEEE International Conference on Dielectric Liquids (ICDL) - Trondheim, Norway Duration: 26 Jun 2011 → 30 Jun 2011 |
Conference
Conference | IEEE International Conference on Dielectric Liquids (ICDL) |
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Country | Norway |
City | Trondheim |
Period | 26/06/11 → 30/06/11 |
Keywords
- breakdown voltage
- delay
- electric breakdown
- electrodes
- geometry
- streaming media
- voltage measurement
- electrode geometry
- voltage rise
- rate
- steamer propagation
- mineral oil