Author(s)

Lingxin Zeng ¹, Shaoting Yuan ²

Affiliation(s)

¹ School of Electronic, Electrical Engineering and Physics, Fujian University of Technology, Fuzhou, 350108, China
² School of Automation and Electrical Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China

Corresponding Author

Lingxin Zeng

ABSTRACT

High-voltage cross-linked polyethylene (XLPE) cables play a pivotal role in power systems owing to their unique advantages. Nonetheless, during cable operation, small bubble defects can arise from manufacturing imperfections or operational issues. Over time, these defects can distort the electric field within the cable, potentially leading to local breakdowns. To investigate the impact of bubble defects on the electric field distribution within XLPE cables, this study employs the COMSOL finite element software to construct a simulation model. Through this model, we simulate the electric field strength inside the cables and analyze its distribution characteristics. Additionally, we explore the effects of varying bubble sizes and positions on field strength distortion. Our findings reveal that a bubble diameter of 0.5mm in the XLPE cable results in electric field strength aberration. Furthermore, as the bubble size increases, the aberration in electric field strength becomes more pronounced. Similarly, as the bubble moves closer to the core end, the deviation in electric field strength intensifies, leading to a greater impact. The insights from this study offer valuable guidance for the operation and maintenance of actual cables.

KEYWORDS

XLPE Cable, Air Bubble Defect, Finite Element Software, Electric Field Strength

CITE THIS PAPER

Lingxin Zeng, Shaoting Yuan, Investigation of electric field effect of bubble defects in XLPE high voltage cables. Journal of Electrotechnology, Electrical Engineering and Management (2024) Vol. 7: 119-131. DOI: http://dx.doi.org/10.23977/jeeem.2024.070216.

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