Título

Partial discharge phenomena in converter and traction transformers: identification and reliability

Autor

CARLOS GUSTAVO AZCARRAGA RAMOS

Colaborador

ANDREA CAVALLINI (Director)

Nivel de Acceso

Acceso Abierto

Resumen o descripción

After the development of power electronics converters, the number of transformers subjected to nonsinusoidal

stresses (including DC) has increased in applications such as HVDC links and traction (electric

train power cars). The effects of non-sinusoidal voltages on transformer insulation have been investigated

by many researchers, but still now, there are some issues that must be understood.

Some of those issues are tackled in this Thesis, studying PD phenomena behavior in Kraft paper, pressboard

and mineral oil at different voltage conditions like AC, DC, AC+DC, notched AC and square waveforms.

From the point of view of converter transformers, it was found that the combined effect of AC and DC

voltages produces higher stresses in the pressboard that those that are present under pure DC voltages.

Fecha de publicación

2014

Tipo de publicación

Tesis de doctorado

Versión de la publicación

Versión publicada

Formato

application/pdf

application/pdf

Idioma

Inglés

Repositorio Orígen

Repositorio Institucional de Acceso Abierto de Información Científica, Tecnológica y de Innovación del INEEL

Descargas

304

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