It is found in this paper that most growing processes of electrical tree are with stages, and are accompanied with two kinds of different treeing structures in XLPE at lower frequency.

• 本文研究发现,XLPE电缆绝缘中电树枝的生长过程多数呈阶段性特征,并且在较低的电压频率下伴随着两种不同的电树枝结构。