Electroluminescence and Space Charge in Nanodielectrics subjected to AC Voltage

Electroluminescence (EL) and Phase Resolved Pulsed Electro-Acoustic (PRPEA) techniques are used to determine charge injection and space charge distribution in insulation subjected to an AC electric field. It is shown that both EL and PRPEA can provide information about the dynamics of charge injection and trapping in solid dielectrics under an AC field. Such techniques are useful in evaluating novel materials, such as nanodielectrics, for use in power apparatus.