固定砂床型軸対称三次元FMを用いた帯電電荷推定法

概要

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The surface of insulators accumulates electric charges during high voltage stress application. The surface charging often causes deteriorations of electrical performance and durability of high voltage insulators in gas. The measurement of charges accumulating on insulator surface is difficult during voltage applications. In this paper, we discuss an estimation method of accumulated charges on a complex insulator surface by the axisymmetric three dimensional fluid flow mapper (FM). The present method derives from a fact that the charge distribution can be simulated by a fixed sand-bed in FM. Moreover we apply this method to a conical insulating spacer for studying the effect of surface charging on the dielectric strength. The experimental results show that streamlines of flow patterns obtained from this method is in agreement with electric flux in the electric fields produced by the accumulated charges. This method is useful for making an estimate of accumulated charge densities appropriate to the conical spacer.
東海大学の論文