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논문 기본 정보

저자정보
(Kyungpook National University) (Kyungpook National University)
저널정보
대한전기학회 전기학회논문지 전기학회논문지 제75권 제10호
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    초록·키워드

    This paper investigates the effects of electrical conductivity models of a lossy dielectric on current pulses and surface charge accumulation in a needle-plane electrode system. Two constant-conductivity cases were compared with a nonlinear model dependent on electric field and temperature. For the nonlinear model, uniform 30°C and temperature-gradient conditions were considered separately. The constant-conductivity cases showed similar pulse magnitudes but different timings, while the temperature-fixed nonlinear model caused only limited changes. In contrast, the temperature-gradient model produced clear differences in current pulses and surface charge distribution. At the same interface position, the surface charge density decreased by about 90%, and the location of maximum charge accumulation shifted. These results show that spatial variations in conductivity due to electric field and temperature significantly affect transient discharge and interfacial charge behavior.

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