Executive Summary : | Power cables are crucial in electrical systems for transmitting and distributing power. They consist of conductors covered with insulating material and protective jackets, with cross-linked polyethylene being the most common material. As the insulation ages, it undergoes various electrical, mechanical, and chemical effects, leading to potential failure. Partial discharge (PD) is the leading cause of breakdown in solid insulating systems, and micro voids and contaminating particles can cause further degradation, leading to insulation breakdown. The reliability of any electrical system depends on the insulation system present. Studying insulating properties and dielectric behavior is essential, as partial discharge signals can be identified using acoustic sensors or coupling capacitors. An experimental study will be conducted on cross-linked polyethylene (XLPE) cable insulation, using Scanning Electron Microscope (SEM), Fourier transform infrared (FTIR) Spectroscopy, and Raman spectroscopy to observe the growth characteristics and deterioration process under high voltage stress. Diagnostic tests are essential for understanding the stability of use for specific insulating materials, estimating the remaining life of the insulator, and checking its quality and dependability on various factors. This project proposal aims to develop a single, integrated portable diagnostic system that can identify fault causes in cable insulation due to different ageing processes and provide reliable information about the insulation condition of high voltage power cables. The studies will help interpret the different ageing processes and identify the failure root cause. |