Observatorio de I+D+i UPM

Memorias de investigación
Book chapters:
Chapter 2: Partial discharges. Keys for condition monitoring and diagnosis of power Transformers
Year:2018
Research Areas
  • Electric engineering
Information
Abstract
The combination of thermal and electrical stress, in conjunction with the synergic effects of moisture in the insulation, might dramatically reduce the lifetime of a power transformer, which is roughly estimated to be 40 years if properly maintained, meaning that many transformers do not experience any failures before being dismantled. Mechanical stresses during short-circuits can also play a role leading, in the worst case, to the radial buckling of the winding and damage of the connection cables at the bushing terminations. A number of these factors can, in the course of time, give rise to partial discharge (PD) phenomena which can be a cause of failure or a symptom of degradation. PD measurements can be carried out conventionally, following the standards IEC 60270 and IEC 60076. Alternative methods, such as those presented in the IEC TS 62478 standard based on acoustic or ultra-high frequency sensors, have been proposed and might offer better sensitivity, particularly for monitoring purposes, and the capability to locate the PD sources. For all these methods, identification of the PD source is a key to achieve a correct course of action (run, repair and replace).
International
Si
10.1049/PBPO104E_ch2
Book Edition
Book Publishing
IET
ISBN
978-1-78561-254-1
Series
Book title
Power Transformer Condition Monitoring and Diagnosis: Concepts and Challenges
From page
39
To page
79
Participants
  • Autor: Ricardo Albarracin Sanchez (UPM)
  • Autor: Guillermo Robles (Universidad Carlos III de Madrid)
  • Autor: Jorge A. Ardila-Rey (UTFSM, Chile)
  • Autor: Andrea Cavallini (Universidad Bolonia, Italia)
  • Autor: Renzo Passaglia (CESI, Italia)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Redes e instalaciones de baja y alta tensión
  • Departamento: Ingeniería Eléctrica, Electrónica Automática y Física Aplicada
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)