Electrical Tree Growth under Square Wave Voltages with DC Bias
Electrical Tree Growth under Square Wave Voltages with DC Bias
复制标题
DOI：
10.1109/icd53806.2022.9863225
复制
发表时间：
2022-07
期刊：
影响因子：
--
通讯作者：
Faisal Aldawsari;H. McDonald;S. Rowland
中科院分区：
文献类型：
--
作者：
Faisal Aldawsari;H. McDonald;S. Rowland
本文研究了方波叠加直流电压作用下环氧树脂中的电树枝生长。使用针-平面配置，施加叠加在15 kV pk 50 Hz方波上的±15 kV DC电压以生长电树。标准50 Hz正弦信号源也用于比较。CCD摄像机在测试期间对电树枝生长进行成像，并记录相关的局部放电。有人观察到，在15 kV方波电压与正或负15 kV直流电压相结合的树的形状是树枝状的，而在15 kV双极方波电压下生长的树枝状树。正单极方波电压导致更快的增长比负单极方波。不同的树结构也与不同的特征PD活性相关。
Electrical tree growth in epoxy resin under square waves superimposed with DC voltages is studied in this paper. Using the needle-plane configuration, a ±15 kV DC voltage superimposed on a 15 kV pk 50 Hz square wave was applied to grow electrical trees. A standard 50 Hz sinusoidal source was also used for comparison. A CCD camera imaged the electrical tree growth during testing and associated partial discharges were recorded. It was observed that the tree shape under 15 kV square-wave voltages combined with positive or negative 15 kV DC voltages are branch-like, whereas bush-branch trees grow under 15 kV bipolar square-wave voltages. Positive unipolar square-wave voltages resulted in faster growth than negative unipolar square waves. The different tree structures were also associated with distinct characteristic PD activity.