Factors affecting polarization and depolarization current measurements on insulation of transformers
Authors:
- 7 March 2017
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Dielectrics and Electrical Insulation
- Vol. 24 (1) , 619-629
Abstract
Polarization and depolarization current measurements are promising on-site, off-line, non-destructive, non-invasive diagnostic tool for condition assessment of paper-oil insulation of transformers. Interpretation of the results of polarization and depolarization current is complex and hence not practiced as a routine diagnostic method for condition monitoring of transformers. This paper discusses various factors affecting polarization and depolarization current measurements with a deeper insight into the theoretical and practical aspects of this technique. Some of the concerns of PDC measurement are explained with support from simulation and experimental studies on paper oil insulation of a laboratory model transformer. Few case studies are discussed to highlight the difficulties in interpretation of results.Keywords
This publication has 10 references indexed in Scilit:
- Assessment of paper-oil insulation under copper corrosion using polarization and depolarization current measurementsIEEE Transactions on Dielectrics and Electrical Insulation, 2016
- Quantitative analysis ageing status of natural ester-paper insulation and mineral oil-paper insulation by polarization/depolarization currentIEEE Transactions on Dielectrics and Electrical Insulation, 2012
- Effect of thermal transient on the polarization and depolarization current measurementsIEEE Transactions on Dielectrics and Electrical Insulation, 2011
- Understanding frequency & time domain polarisation methods for the insulation condition assessment of power transformers2009
- Asset-Management of Transformers Based on Condition Monitoring and Standard Diagnosis [Feature Article]IEEE Electrical Insulation Magazine, 2008
- Investigations of Temperature Effects on the Dielectric Response Measurements of Transformer Oil-Paper Insulation SystemIEEE Transactions on Power Delivery, 2007
- Deriving an Equivalent Circuit of Transformers Insulation for Understanding the Dielectric Response MeasurementsIEEE Transactions on Power Delivery, 2005
- Some precautions for the field users of PDC measurement for transformer insulation condition assessment2004
- Investigation of polarization and depolarization current measurements for the assessment of oil-paper insulation of aged transformersIEEE Transactions on Dielectrics and Electrical Insulation, 2004
- Review of modern diagnostic techniques for assessing insulation condition in aged transformersIEEE Transactions on Dielectrics and Electrical Insulation, 2003