Yasha Li, Huiyao Wang*, Kai Chen and Jiamao Chen Pages 114 - 121 ( 8 )
Background: Electrical trees can affect the distribution of electric field and space charge in cross-linked polyethylene (XLPE) cables, and play an important role in insulation aging and breakdown of cables. Therefore, it is important to study the influence of electrical trees in cables.
Methods: In this study, the finite element method of second-order tetrahedral element and electromagnetic theory method is used for calculation. A model of XLPE cable with three-dimensional electrical trees is taken as an example for calculation.
Results: The results show that the longer the trunk length is, the greater the electric field intensity at the end of the branch is; the farther the electrical trees are from the insulation side of the high voltage, the more the electric field intensity of each location decreases.
Conclusion: With the increase of the resistivity of the trees, the electric field intensity and charge density tend to be stable at the end of the tree.
XLPE cable, finite element analysis, space charge, electric field intensity, charge density, electrical trees.
College of Electrical Engineering and New Energy, China Three Gorges University, 8 Daxue Road, Yichang 443002, College of Electrical Engineering and New Energy, China Three Gorges University, 8 Daxue Road, Yichang 443002, College of Electrical Engineering and New Energy, China Three Gorges University, 8 Daxue Road, Yichang 443002, College of Electrical Engineering and New Energy, China Three Gorges University, 8 Daxue Road, Yichang 443002