• Journal of Electrical Engineering and Technology
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• 제5권4호
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• pp.631-636
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• 2010

Gas-insulated transmission lines (GITL) are valued as technological solutions in hydro-power stations due to their enormous power handling capabilities. The performance of GITL is a function of the size of metallic particles inside the gas-insulated chamber. Electrostatic field (E-field) enhancement is a common phenomenon in gas-insulated lines due to these metallic particles. In this study, the E-field enhancement factor is calculated by considering metallic particles at various locations in the gas-insulated line/bus section, such as high-tension (HT) conductor, high-voltage shields, support insulator, and inner surface of grounded enclosure. For this purpose, a two-dimensional model based on finite element (FE) method is developed. The length of the metallic particle is in the range of 1 to 10 mm while the diameter is between 1 to 3 mm. E-field enhancement is also computed for various particle configurations of the gas-insulated system, with focus on dielectric coating made of epoxy on HT conductor and inner surface of grounded enclosure.

• 소음진동
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• 제9권3호
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• pp.621-628
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• 1999

본 논문에서는 평면 계에서의 전기전하 입자의 기본적인 동특성을 간단한 모델을 이용하여 실험적으로 살펴보았다. 실험에서는 전기전하입자 모델로 4개의 소형구(전도체로 표면을 잘 도포한 탁구공)를 사용하였으며, 측정시 중력효과를 배제하기 위하여 잘 절연된 줄에 매달린 형태를 적용하였다. 실험으로 측정한 평형위치(각도)와 전하입자의 고유동수는 계산된 값과 상당히 근접함을 보인다.