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Focused on the analysis of some parameters derived from pulse electroacoustic measurements, the article tries to identify the evolution of space charge and field in paper-oil systems submitted to gamma radiation, and to emphasize, by comparing to unaged structures, some aspects susceptible to lead to a higher reliability of DC cables insulation for nuclear power.
Apparent mobility obtained from space charge decay measurement has been recently used as an ageing marker to assess degradation of the insulation materials. The apparent mobility of charge carriers becomes slower after experiencing electrical ageing. In this paper, we have measured space charge decay in polymeric insulation material using the pulsed electroacoustic technique and studied apparent mobility...
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