Investigation on surface charge distribution inside of cylindrical alumina insulator of vacuum bulb under AC voltage application
Investigation on surface charge distribution inside of cylindrical alumina insulator of vacuum bulb under AC voltage application
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DOI：
10.1109/deiv.2016.7748684
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发表时间：
2016-09
期刊：
影响因子：
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通讯作者：
H. Fukuda;K. Ishikawa;K. Yamamura;A. Sano;R. Yoshida;Y. Yamano;O. Yamamoto
中科院分区：
文献类型：
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作者：
H. Fukuda;K. Ishikawa;K. Yamamura;A. Sano;R. Yoshida;Y. Yamano;O. Yamamoto
在真空断路器（维斯）等真空设备的设计中，掌握真空中沿面闪络的特性是重要因素之一。在这项研究中，我们测量了在交流电压的应用后，瓶型绝缘子作为模型绝缘子的VI内部的电荷分布特性。该绝缘体在绝缘体的两端具有屏蔽环（屏蔽件）以减轻三重结（TJ）附近的电场，并且我们研究了屏蔽件的配置与电荷分布之间的关系。结果，当对同一样品类似地施加三次AC电压时，与第一次相比，第二次和第三次施加中的表面电荷的最大值由于调节效应而逐渐减小。屏蔽体与绝缘子之间间隙窄的样品的带电减少率高于间隙宽的样品。
In designing a vacuum equipment such as Vacuum Interrupters (VIs), it is one of the important factors to grasp the characteristics of surface flashover in vacuum, which occurs via charging of the insulator. In this study, we measured the charge distribution characteristics inside a bottle type insulator as the model insulator of VI after the AC voltage application. This insulator has shield rings (shields) at both ends of the insulator to mitigate the electric field near the triple junctions (TJ) and we investigated a relationship between configurations of the shield and the charge distributions. As a result, when AC voltage was similarly applied three times to the same sample, the maximum values of surface charge in the second and the third applications were gradually reduced due to conditioning effect, compared with that of the first one. The reduction rate of charging of a sample with narrow clearance between the shield and insulator was higher than that with wide clearances.