Affiliation:
1. Dipartimento di Ingegneria Industriale, Università degli Studi di Padova, 35131 Padova, Italy
2. Center for Advanced Power Systems, Florida State University, Tallahassee, FL 32310, USA
Abstract
Partial discharge inception modeling is a powerful tool for material investigation and insulation system design in order to achieve the objective of PD-free operation of insulation systems. Model validation, however, requires accurate and repeatable testing conditions, and the aim of this paper is to look at the influence of electrodes and electric field simulation on partial discharge inception model prediction accuracy. Awareness of the geometric electrode configuration is important to forecast both the typology of discharge and the corresponding partial discharge inception voltage value. It is shown, in fact, that inaccurate evaluation of electrode shape (e.g., its flat part and contour) might impact significantly on electric field estimation, the typology of incepted discharges, and, thus, on model accuracy, i.e., on partial discharge inception voltage prediction, which is the basis for the partial discharge-free design of insulating materials and systems. In particular, small electrode curvature radius variations do not significantly affect the PDIV value or PD typology identification. However, worsening electrode/insulation specimen contact can significantly impact PD inception and typology evaluation.
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference21 articles.
1. Partial discharge diagnostics and electrical equipment insulation condition assessment;Stone;IEEE Trans. Dielectr. Electr. Insul.,2005
2. Partial discharge signal interpretation for generator diagnostics;Hudon;IEEE Trans. Dielectr. Electr. Insul.,2005
3. Kreuger, F.H. (1990). Partial Discharge Detection in High-Voltage Equipment, Butterworth-Heinemann.
4. (2011). Evaluation and Qualification of Electrical Insulation Systems (Standard No. IEC 60505).
5. (2018). Partial Discharge Free Electrical Insulation Systems (Type I) Used in Rotating Electrical Machines Fed from Voltage Converters—Qualification and Quality Control Tests (Standard No. IEC 60034-18-41).