Author(s)

Ziyan Zhu ¹

Affiliation(s)

¹ Electric Power Engineering, Nanjing Institute of Technology, Nanjing, 211100, China

Corresponding Author

Ziyan Zhu

ABSTRACT

With the continuous advancement of urbanization and the improvement of people's living standards, power cables have become an important part of the power system; cross-linked polyethylene insulated cables have good electrical insulation properties, high mechanical strength, and high carrying capacity. The advantages have been widely used in high-pressure and ultra-high-pressure fields. However, during the manufacturing and operation of cables, small air bubbles may occur in the XLPE, which can cause distortion in the distribution of electric fields in the cable.The present study used the COMSOL finite element software for simulation to emulate the electric field in XLPE cables, specifically investigating the distribution features of bubbles of various sizes and locations in the 10kV XLPE cables. The results of the simulation show that the presence of bubbles inside the XLPE layer leads to a significant decrease in potential at the interface among the bubble with XLPE. Additionally, the electrical field intensity at the position of the bubble is greater compared to the electric field strength in the absence of bubbles.And as the position of the bubble gets closer to the outer layer of XLPE, the maximum field strength at the bubble becomes smaller.

KEYWORDS

Cross-linked polyethylene cable, Air gap, Finite element software, Electric field strength

CITE THIS PAPER

Ziyan Zhu, Simulation Analysis of Electric Field of Air Gap Defect in 10KV XLPE Cable Based on COMSOL. Journal of Electrotechnology, Electrical Engineering and Management (2024) Vol. 7: 55-65. DOI: http://dx.doi.org/10.23977/jeeem.2024.070208.

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