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As the digital revolution takes hold it becomes increasingly practical to measure partial discharge parameters using purely digital techniques. Many of the possible approaches to the estimation problem are still not economically feasible for commercial testing applications. However, in the near future, the price of digital signal processors will be low enough to use in standard measurement systems...
Real time waveforms and their statistical properties help to identify and characterize differences in the partial discharge processes that cause them. A special test cell has been constructed which permits simultaneous observation of both the electromagnetic and the ultrasonic signals generated by partial discharges in dielectrics. A basic cross section of the test cell is shown in Fig. 1. Different...
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