Research of Single-Core Power Cables Remaining Life Assessment Based on Operating Conditions
Year: 2026
Type: conference-paper
Abstract: The reliable operation of power cables is a critical concern for industrial enterprises and power supply organizations. This paper investigates the factors influencing the aging of single-core power cable insulation, with a particular focus on the effect of sheath currents and thermal stress on insulation degradation and partial discharge (PD) activity. A comprehensive analysis of fundamental and operational degradation factors is presented. Several mathematical models of insulation aging (Zhurkov, Crine, Combined Arrhenius-IPM, and Kuchinsky models) are reviewed and compared for their applicability to impregnated paper and cross-linked polyethylene insulation. Temperature distribution simulation within a single-core cable was performed under various load currents and installation configurations. The simulation results were used to estimate the residual life of cable insulation based on a combined Arrhenius-inverse power aging model. The research demonstrates that sheath currents and load-induced temperature rises significantly reduce cable service life. The predicted service life of cable insulation based on the dependence on cable core temperature excess above the ambient temperature is calculated. The proposed approach is simple enough for implementation in industry as one of the features to make a decision on cable insulation operability.
Institution: Omsk State Technical University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W7202264871