Improvement of RVM Test Interpretation Using a Debye Equivalent Circuit

Miguel Martínez and Jorge Pleite
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Miguel Martínez: Iberdrola Renewables, Tomas Redondo 1, 28033 Madrid, Spain
Jorge Pleite: Department of Electronics Engineering, Universidad Carlos III de Madrid, 28911 Leganés, Spain

Energies, 2020, vol. 13, issue 2, 1-13

Abstract: The aim of this document is to present how the interpretation of the RVM (Recovery Voltage Measurement) test can be improved through the use of a Debye equivalent circuit. As it is described in the literature, the interpretation of the RVM test requires expertise and if the transformer presents a high interfacial polarization it is not possible to diagnose it in detail. The Debye model is proposed in this work for enhancing RVM interpretation. This model is based on an electrical circuit that includes basic R-C components, that allows two interesting features: on one hand, insulation physical effects can be separately represented and, on the other, the values of the R-C components can be calculated from the RVM response. A method is proposed in which using a sweep with a constant number of predefined time constants branches allows us to determine the areas of influence of the different compounds present in the dielectric. Finally, several case studies are presented, in which it is correlated a dielectric oil treatment carried out and the equivalent circuit changes using a sweep allows us to analyze different branches’ sensitivity and to identify the areas of influence of each compound.

Keywords: Debye model; dielectric properties; power transformers; spectroscopy; recovery voltage measurement (RVM); oil–paper insulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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