3D XCT imaging of electrical tree growth in epoxy resin
3D XCT imaging of electrical tree growth in epoxy resin
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DOI：
10.1109/tdei.2019.008450
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发表时间：
2020-04-01
影响因子：
3.1
通讯作者：
Burnett, Timothy
中科院分区：
文献类型：
--
作者：
Lv, Zepeng;Chen, Siyuan;Burnett, Timothy
本文报道了用X射线计算机层析成像术(XCT)对电气树生长的多步骤观测。通过从随后的图像中减去一幅图像来获得观察时间之间的增长。在树木生长过程中也记录到局部放电(PD)信号。确定并非所有PD都支持树扩展。通过比较PD释放的能量和新生长的树木通道的蒸发能量，发现只有到达树尖的PD才能促进树长的生长。在这种情况下，能量转换效率非常高，而导致树木通道直径增加的PD转换效率要低得多。纳米XCT图像显示，沿着主树的主干和主经络树尖的前面有许多更精细的树枝。这些细小的树枝似乎促进了树木的生长，但与局部帕金森病没有直接关系。新的成像技术在解决局部放电活动与电树生长之间的关系方面显示出巨大的价值，为更深入地了解树木的生长过程和解释局部放电测量提供了平台。
This paper reports observations of electrical tree growth by X-ray computed tomography (XCT) in multiple steps. Growth between times of observation has been obtained by subtraction of an image from the subsequent one. Partial discharge (PD) signals were also recorded during tree growth. It is determined that not all PDs support tree extension. By comparing the energy released by PD and the vaporization energy of newly grown tree channels, it is found that only the PDs that reach the tree tips can contribute to the growth of tree length. In such cases, the efficiency of energy conversion was very high, whereas PD resulting in increases in tree channel diameter had a much lower conversion efficiency. Nano XCT images reveal many finer branches along the trunk of the main tree and in the front of the main channel tree tips. It seems that those finer branches led to tree growth, but were not directly associated with local PD. The new imaging techniques have shown great value in resolving the relationship between partial discharge activity and electrical tree growth, providing a platform for deeper understanding of the tree growth process, and interpretation of partial discharge measurements.