Akademik Veri Yönetim Sistemi
IEEE ACCESS, cilt.13, ss.215963-215971, 2025 (SCI-Expanded, Scopus)
This study presents a comprehensive experimental and numerical analysis of electric field distribution in extra high-voltage (EHV) cable joint structures using six different solid insulating materials. The materials evaluated include SBR, NR, SIR, EPDM, CR, and NBR/SBR blends. Electrical parameters such as capacitance, loss factor, and dielectric constant were measured under various high-voltage conditions according to IEC 60625 standards. COMSOL Multiphysics was employed to simulate electric field distribution in three-dimensional joint geometries to validate experimental findings. Results showed that EPDM and SBR provided the most stable dielectric behavior, maintaining low loss factors and electric field strengths within acceptable limits. In contrast, SIR and NBR/SBR exhibited excessive electric field intensities, rendering them unsuitable for high-voltage applications. The simulations confirmed that field stress concentrates near dielectric discontinuities and geometrical transitions, especially in the absence of stress cones. The integrated approach used in this study highlights the importance of material selection and structural optimization in enhancing the electrical reliability of EHV cable joints. These findings offer valuable insights for future design strategies and the development of advanced insulating systems.