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The oil/pressboard insulation system in converter transformer undertakes AC superimposed DC and polarity reversal voltages in operation. In order to match the conductivity of oil and pressboard to reduce the differences of field intensity between in oil and in pressboard under direct current and polarity reversal voltages, and also to improve the space charge characteristics at oil/pressboard interface,...
Impacts of temperature on the distribution of electric field in high voltage direct current (HVDC) cable joint have been investigated with COMSOL Multi-physics. The simulation of electric field under combined thermal-electrical conditions was carried out on a three-dimensional joint model, in which constant dc voltage and combined dc/impulse voltage were applied on the cable core while the temperatures...
The deformation and motion behaviors of droplets under electric field are important research tasks regarding the mechanisms of emulsion electric dehydration. In order to study the dehydration characteristics of droplets under a non-uniform electric field, the simulation model of droplets under a non-uniform electric field was established using the phase field method, based on Cahn-Hilliard formulation...
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