Abstract

Partial discharges are one of the main factors responsible for the aging and degradation of cross-linked polyethylene (XLPE) insulation in high-voltage power cables, directly affecting their reliability and service life. This study focuses on the numerical modeling of partial discharge initiation and development in XLPE-insulated high-voltage cables to improve monitoring and control strategies. The proposed model integrates electric distribution, insulation geometry, and defect characteristics that trigger partial discharge activity. The influence of electric field intensity, charge accumulation, and local insulation inhomogeneities on the magnitude and repetition rate of partial discharges is analyzed. Numerical simulation results make it possible to identify critical regions within the insulation that are most susceptible to partial discharge activity and to evaluate the effectiveness of different control approaches. The findings provide valuable insights for enhancing diagnostic techniques, predicting the remaining lifetime of high-voltage cables, and developing measures aimed at mitigating partial discharge activity. The proposed modeling framework contributes to improving the operational reliability and safety of high-voltage cable systems.

Keywords: partial discharges, XLPE insulation, high-voltage power cables, numerical modeling, electric field, insulation diagnostics

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