高度不均匀场下液体流速对矿物油击穿电压的影响

10th International Conference on Conduction and Breakdown in Dielectric Liquids Pub Date : 1990-09-10 DOI:10.1109/ICDL.1990.202966

A. Zaky, I. Megahed, M. El-Awa

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引用次数: 7

摘要

采用针点和网状平面电极系统，研究了强制流速对变压器油击穿电压/间隙长度特性的影响。轴向(共场)油流速度在0 ~ 280 cm/s之间变化。对脱气油、0 /亚2/饱和油和SF/亚6/饱和油进行了负极性和正极性试验。对于脱气油，随着油速度的增加，击穿电压在点的极性和所检查的整个间隙范围内都有很大的增加。对于O/sub 2/-和SF/sub 6/-饱和油，击穿电压也有类似的增加，但点为负。当点为正时，90 cm/s以上的速度没有影响。

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Effect of liquid flow velocity on the breakdown voltage of mineral oil under highly nonuniform fields

The effect of forced flow velocity on the breakdown voltage/gap length characteristics of transformer oil was studied using a needle point and a mesh plane electrode system. The velocity of the axial (co-field) oil flow varied from 0 to 280 cm/s. Tests were carried out on degassed oil, O/sub 2/-saturated oil, and SF/sub 6/-saturated oil for negative and positive point polarities. For degassed oil there was a large increase in the breakdown voltage with increasing oil velocity for both polarities of the point and over the whole range of gaps examined. For O/sub 2/- and SF/sub 6/-saturated oils a similar increase in breakdown voltage was observed only with the point negative. With the point positive, velocities above 90 cm/s had no effect.<>

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10th International Conference on Conduction and Breakdown in Dielectric Liquids

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