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고전압 및 방전공학 : 액체질소 절연파괴전압의 상관 분석

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High Voltage and Discharge Engineering : Correlation Analysis of the Dielectric Breakdown Voltage of Liquid Nitrogen

Seung Myeong Baek
J Electr Electron Mater 2015;28(6):396-399.
Published online: June 1, 2015
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우리는 액체질소의 절연파괴전압과 인자와의 상관관계를 분석하였다. 절연파괴전압에 영향을 미치는 선택된 인자는 전극 직경, 전극 간격, 액체질소의 온도 및 액체질소의 압력이다. 전극 직경, 전격 간격 및 압력이 증가하면 액체질소의 절연파괴전압은 증가하였다. 그리고 온도는 감소할수록 절연파괴전압은 증가하였다. 하지만, 상관계수는 상황별로 다르게 나타났다. 전극 직경에 따라 매우 높은 0.9227의 상관계수를 나타내었다. 그리고 구(직경 7.5 mm)-평판 전극계에서 압력에 따른 상관계수는 0.94980으로 절연파괴전압과 압력은 아주 높은 관계를 나타내었다. 침-평판전극계보다 구-평판 전극계에서 절연파괴전압의 압력과 관계가 높았다. 침-평판 전극계에서 액체질소의 온도에 따른 상관계수는 ?0.758290 ~ -0.39946로 다소 높은과 낮은 관계를 나타내었다.

We analyzed the correlation between breakdown voltage(BDV) of liquid nitrogen(LN2) and factors. The chosen factors affecting the breakdown are the diameter of electrode, gap length, temperature of LN2, and pressure of LN2. The BDV of LN2 was increased with increasing the diameter, the gap length and the pressure. And The BDV of LN2 was increased with decreasing the temperature. However, correlation coefficient was different from each other depending on the situation. The BDV exhibited a very high correlation coefficient of 0.92227 to dependence on the diameter. And a very high correlation coefficient of 0.94980 to dependence on the pressure under sphere(D 7.5 mm)-plane electrode. When the pressure is applied, sphere-plane electrode is the correlation coefficient was higher than that of the needle-plane electrode. It shows the dependence of a temperature coefficient of ?0.758290 ~ -0.39946 under needle-plane electrode.

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High Voltage and Discharge Engineering : Correlation Analysis of the Dielectric Breakdown Voltage of Liquid Nitrogen
J Electr Electron Mater. 2015;28(6):396-399.   Published online June 1, 2015
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High Voltage and Discharge Engineering : Correlation Analysis of the Dielectric Breakdown Voltage of Liquid Nitrogen
J Electr Electron Mater. 2015;28(6):396-399.   Published online June 1, 2015
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