불평등전극계에서 뇌임펄스전압에 대한 N2기체의 절연파괴 특성

초록

This paper presents the experimental results on breakdown characteristics in N2 gas under non-uniform electric fields caused by both the positive and negative lightning impulse voltages. N2 gas have an advantage of eco-friendly and cost reduction, and safety aspects. In order to analyze the impulse pre-breakdown processes in N2 gas, we carried out measurements and observations of the impulse breakdown voltages, pre-breakdown current and luminous signals. They were measured by a voltage divider, a shunt and a photo-multiplier tube, respectively. Additionally, the characteristics of discharge channels were observed by high speed cameras. The breakdown voltages in the positive polarity was lower than those in the negative polarity.