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Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-t(eff) Patterns
During the last two decades, on-line partial discharge (PD) measurements have been proven as a very efficient test to evaluate the insulation condition of high-voltage (HV) installations in service. Among the different PD-measuring techniques, the non-conventional electromagnetic methods are the mos...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013845/ https://www.ncbi.nlm.nih.gov/pubmed/31936669 http://dx.doi.org/10.3390/s20020382 |
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author | Albarracín-Sánchez, Ricardo Álvarez-Gómez, Fernando Vera-Romero, Carlos A. Rodríguez-Serna, Johnatan M. |
author_facet | Albarracín-Sánchez, Ricardo Álvarez-Gómez, Fernando Vera-Romero, Carlos A. Rodríguez-Serna, Johnatan M. |
author_sort | Albarracín-Sánchez, Ricardo |
collection | PubMed |
description | During the last two decades, on-line partial discharge (PD) measurements have been proven as a very efficient test to evaluate the insulation condition of high-voltage (HV) installations in service. Among the different PD-measuring techniques, the non-conventional electromagnetic methods are the most used due to their effectiveness and versatility. However, there are two main difficulties to overcome in on-line PD measurements when these methods are applied: the ambient electric noise and the simultaneous presence of various types of PD or pulse-shaped signals in the HV facility to be evaluated. A practical and effective method is presented to separate and identify PD sources acting simultaneously in HV systems under test. This method enables testers to carry out a first accurate diagnosis of the installation while performing the measurements in situ with non-invasive high-frequency current transformers (HFCT) used as sensors. The data acquisition in real-time reduces the time of postprocessing by an expert. This method was implemented in a Matlab application named PRPD-time tool, which consists of the analysis of the Phase-Resolved Partial Discharge (PRPD) pattern in combination with two types of interactive graphic representations. These graphical depictions are obtained including a feature parameter, effective time (t(eff)), related to the duration of single measured pulses as a third axis incorporated in a classical PRPD representation, named the PRPD-t(eff) pattern. The resulting interactive diagrams are complementary and allow the pulse source separation of pulses and clustering. The effectiveness of the proposed method and the developed Matlab application for separating PD sources is demonstrated with a practical laboratory experiment where various PD sources and pulse-type noise interferences were simultaneously measured. |
format | Online Article Text |
id | pubmed-7013845 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-70138452020-03-09 Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-t(eff) Patterns Albarracín-Sánchez, Ricardo Álvarez-Gómez, Fernando Vera-Romero, Carlos A. Rodríguez-Serna, Johnatan M. Sensors (Basel) Article During the last two decades, on-line partial discharge (PD) measurements have been proven as a very efficient test to evaluate the insulation condition of high-voltage (HV) installations in service. Among the different PD-measuring techniques, the non-conventional electromagnetic methods are the most used due to their effectiveness and versatility. However, there are two main difficulties to overcome in on-line PD measurements when these methods are applied: the ambient electric noise and the simultaneous presence of various types of PD or pulse-shaped signals in the HV facility to be evaluated. A practical and effective method is presented to separate and identify PD sources acting simultaneously in HV systems under test. This method enables testers to carry out a first accurate diagnosis of the installation while performing the measurements in situ with non-invasive high-frequency current transformers (HFCT) used as sensors. The data acquisition in real-time reduces the time of postprocessing by an expert. This method was implemented in a Matlab application named PRPD-time tool, which consists of the analysis of the Phase-Resolved Partial Discharge (PRPD) pattern in combination with two types of interactive graphic representations. These graphical depictions are obtained including a feature parameter, effective time (t(eff)), related to the duration of single measured pulses as a third axis incorporated in a classical PRPD representation, named the PRPD-t(eff) pattern. The resulting interactive diagrams are complementary and allow the pulse source separation of pulses and clustering. The effectiveness of the proposed method and the developed Matlab application for separating PD sources is demonstrated with a practical laboratory experiment where various PD sources and pulse-type noise interferences were simultaneously measured. MDPI 2020-01-09 /pmc/articles/PMC7013845/ /pubmed/31936669 http://dx.doi.org/10.3390/s20020382 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Albarracín-Sánchez, Ricardo Álvarez-Gómez, Fernando Vera-Romero, Carlos A. Rodríguez-Serna, Johnatan M. Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-t(eff) Patterns |
title | Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-t(eff) Patterns |
title_full | Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-t(eff) Patterns |
title_fullStr | Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-t(eff) Patterns |
title_full_unstemmed | Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-t(eff) Patterns |
title_short | Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-t(eff) Patterns |
title_sort | separation of partial discharge sources measured in the high-frequency range with hfct sensors using prpd-t(eff) patterns |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7013845/ https://www.ncbi.nlm.nih.gov/pubmed/31936669 http://dx.doi.org/10.3390/s20020382 |
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