Effect of the Electrodes' Shape on the Transition between 2nd and 3rd Modes Streamer Discharge

The aim of this investigation is to determine how the electrode shape impacts the change from the second to the third modes of streamer discharge in transformer oil. To achieve this, three systems—rod-plate, needle-plate, and needle-sphere electrode configurations—were employed. The characteristics of the streamer, such as its beginning time, length, propagation velocity, and radius, were examined during the investigation. The results of our simulation clearly show how the characteristics of the streamer and thus, the transition to the third mode, are affected by the form of the electrodes. According to the data, the lowest applied voltage required for the electrodes (rod-plate, needle-plate, and needle-sphere) to transition to the third mode was (265,269,281) kV, respectively. For each of the three designs, the space between the electrodes was fixed at 1 mm, the anode tip's curvature was fixed at 40 µm, and the applied voltage was 300 kV. The investigation was simulated in two dimensions using COMSOL Multiphysics.

Anahtar Kelimeler: Numerical Simulation, Streamer Discharge, Breakdown, transformer oil

The aim of this investigation is to determine how the electrode shape impacts the change from the second to the third modes of streamer discharge in transformer oil. To achieve this, three systems—rod-plate, needle-plate, and needle-sphere electrode configurations—were employed. The characteristics of the streamer, such as its beginning time, length, propagation velocity, and radius, were examined during the investigation. The results of our simulation clearly show how the characteristics of the streamer and thus, the transition to the third mode, are affected by the form of the electrodes. According to the data, the lowest applied voltage required for the electrodes (rod-plate, needle-plate, and needle-sphere) to transition to the third mode was (265,269,281) kV, respectively. For each of the three designs, the space between the electrodes was fixed at 1 mm, the anode tip's curvature was fixed at 40 µm, and the applied voltage was 300 kV. The investigation was simulated in two dimensions using COMSOL Multiphysics.

Keywords: Numerical Simulation, Streamer Discharge, Breakdown, transformer oil

Sayfa Aralığı: 117-132

Khalaf, S. A. & Khalaf, T. H. (2023). Effect of the Electrodes' Shape on the Transition between 2nd and 3rd Modes Streamer Discharge. Journal of Current Research on Engineering, Science and Technology, 9 (1), 117-132.