Preprint Article Version 1 This version is not peer-reviewed

Improvement of RVM Test Interpretation Using a Debye Equivalent Circuit

Version 1 : Received: 14 December 2019 / Approved: 15 December 2019 / Online: 15 December 2019 (16:09:57 CET)

A peer-reviewed article of this Preprint also exists.

Martínez, M.; Pleite, J. Improvement of RVM Test Interpretation Using a Debye Equivalent Circuit. Energies 2020, 13, 323. Martínez, M.; Pleite, J. Improvement of RVM Test Interpretation Using a Debye Equivalent Circuit. Energies 2020, 13, 323.

Journal reference: Energies 2020, 13, 323
DOI: 10.3390/en13020323

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. Debye model is proposed in this work for enhancing RVM interpretation. This model is based on an electrical circuit that includes basic R-L-C components, that allows two interesting features: on one hand, isolation physical effects can be separately represented and, on the other, the values of the R-C components can be calculated from the RVM response (L components are not used in this work as long as no magnetic field effects are taken into account). Thus, the different isolation effects that are indistinguishable merged in the RVM transient response can be split into different R-C branches, each one corresponding with a single (not merged) isolation effect. Finally, several case studies are presented, in which it is correlated a dielectric oil treatment carried out and the equivalent circuit changes.

Subject Areas

Debye model; dielectric properties; power transformers; spectroscopy; recovery voltage measurement (RVM); oil-paper insulation

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