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Physical modelling and mathematical description of PD processes with application to PRPD patterns

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1 Author(s)
Heitz, C. ; ABB Corp. Res., Switzerland

A general framework for the physical description of partial discharge (PD) processes is presented that holds for different types of PD defects. A PD process is a special stochastic process consisting of point-like discharges and drift/recombination phases between the discharges where only the fast point-like discharges can be measured as PD signals. It is determined by few basic physical parameters. Mathematically, a PD process can be formulated either in a point process framework or in a stochastic process framework. Both approaches are presented. The link between the process and observable quantities like phase resolved PD (PRPD) patterns is derived. With the new approach a much easier interpretation and analysis of PD patterns is possible. For all of the three discharge types (internal, surface, corona) examples are presented that demonstrate the applicability of the model

Published in:

High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)  (Volume:5 )

Date of Conference:

1999