Abstract:

The long-term reliability of high-voltage direct current (HVDC) cable systems relies significantly on composite insulating layers. Reliable power transmission over extended spans relies on their lifetime being optimized. Limited material knowledge and lacking diagnostic tools may lead existing techniques to fail to detect early-stage deterioration or to not reasonably estimate insulation aging. The paper discusses a new methodology for Material Structure Analysis (MSA) based improvement of the durability of HVDC cable insulation. With advanced techniques such as dielectric spectroscopy, thermal-mechanical analysis, and microscopic imaging, the proposed methodology identifies structural defects and assesses material performance under stress. These techniques enable targeted improvement in material selection and insulation design. Applying the MSA framework makes it possible for research to exhibit increased diagnostic accuracy as well as higher long-term behavior prediction ability. The findings indicate a significantly improved insulation life expectancy and reliability, giving sound road map next HVDC cable construction.