Abstract
The pulsed electro-acoustic method (PEA) is widely used both in laboratory for fundamental research and in industry for high-voltage direct current cable assessment and diagnosis. It is well known that the electrical stress in dielectrics can be influenced by space charges. In this study, we have modified and upgraded the PEA system for better resolution, safety, and measurement of the space charge distributions automatically in a solid dielectric during the application of various DC high voltages. We adapt the PCI extensions for instrumentation system with a DSO/DAQ system for automatic measurements. The system could be used to automatically measure the space charge distribution with higher accuracy under various applied DC voltages.
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