سال انتشار: ۱۳۸۴
محل انتشار: سیزدهیمن کنفرانس مهندسی برق ایران
تعداد صفحات: ۵
Saniei – Institute for Energy and Environment University of Strathclyde
Fouracre – Institute for Energy and Environment University of Strathclyde
MacGreggor – Institute for Energy and Environment University of Strathclyde
The paper reports on an investigation into the mechanisms and development of the breakdown of a triggered water gap plane-parallel electrodesystem with an electrically isolated trigger pin. A fast (5000 fps) CCD camera was used to observe the gap after a voltage pulse had been applied to the trigger pin. The optical observations obtained by the high-speed digital camera show the development and collapse of a bubble formed as a result of the (500ns) trigger pulse. Simulation results using QuickField software indicated that the magnitude of the electric field within theubble increased after the main voltage had been applied across the water gap. Due to the lower electrical strength of water vapour, an electric avalanche was initiated within the bubble. The complete gap breaks down as a consequence of the discharge within the bubble and the subsequent streamer propagation in the water gap.