DIGITAL-TECHNIQUES FOR PARTIAL DISCHARGE MEASUREMENTS

The working group is addressing the subject of digital analysis of partial discharges (PD) in power apparatus. Included in its activities is a worldwide survey of ongoing research and a review of previous work in this area. Several papers are being prepared with emphasis on the post-measurement processing, analysis, and meaningful presentation of the PD signals, and the significance of the presentation as it relates to insulation degradation in various types of power apparatus. The papers describe currently accepted techniques using analog type instrumentation for detection and display, present critical reviews of these techniques for assessment of the qualification of power apparatus, and show the inadequacies of these methods in light of the new techniques using digital technology. This report is an excerpt, dealing with the general concepts of digital techniques in PD measurements, taken from that paper. The complete Bibliography used to date is presented at the end of this paper for further reading.