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A comparative study of the space charge behavior in XLPE and EPR in the presence of thermal gradient was conducted. For power cable under load conditions, a temperature gradient is established across the cable insulation. Due to the resistive grading under high voltage direct current, such thermal gradient will result in the accumulation of space charge. A modified pulsed-electroacoustic system was...
This paper describes the comparison between the simulated results of thermal gradient using COMSOL and actual observed results of thermal gradient in modified thin film pulsed electroacoustic system, together with the effect of thermal gradient on space charge at room temperature and 50 °C. The results show the presence of thermal gradient facilitates the charge injection and electric field distortion,...
Direct observation of space charge injection and transport in solid dielectrics, as well as their spatial evolution over time, is of great importance in the investigation of design stress and the aging mechanism of engineering dielectrics under high electrical DC field. Through model-aided design, the parallel plate, pulsed-electroacoustic space charge profiling technique is extended to include thermal...
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