Abstract
High-voltage cross-linked polyethylene cables are prominently and consistently utilized in high-voltage systems and cable systems networks due to their dependability and reliability. The reported increase in the insulation breakdown of these cables has substantial repercussions on both industries and the economic activity of a nation. Consequently, it becomes crucial to understand and ascertain the insulation lifespan of HV XLPE cables using appropriate models.
Therefore, the estimation of insulation ageing time, under applied voltage and temperature stresses is of paramount importance. A thermal aging analysis is applied alongside the Arrhenius and regression models as a comparative approach to forecasting the cable's lifespan under varying temperatures. This investigation is executed within an indoor laboratory setting, subjecting a 10-meter cable segment to heating voltage tests at distinct temperatures. Collected data, encompassing conductor temperature, ambient temperature, phase-to-ground voltage of the cable, and conductor losses. Results suggest that operating temperatures exceeding 90°C correlate with a potential industry survival of less than 40 years, while temperatures below 90°C suggest a possible operational longevity of over 50 years.