Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case Study
The article describes a case study when the voltage collapse during lightning impulse tests of new power transformers was noticed and when the repeated tests finished with a positive result. The step-by-step process of reaching the conclusion on the basis of dissolved gas analysis (DGA) as a key met...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/24/6713 |
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| author | Tomasz Piotrowski Pawel Rozga Ryszard Kozak Zbigniew Szymanski |
| author_facet | Tomasz Piotrowski Pawel Rozga Ryszard Kozak Zbigniew Szymanski |
| author_sort | Tomasz Piotrowski |
| collection | DOAJ |
| description | The article describes a case study when the voltage collapse during lightning impulse tests of new power transformers was noticed and when the repeated tests finished with a positive result. The step-by-step process of reaching the conclusion on the basis of dissolved gas analysis (DGA) as a key method of the investigations was presented. The considerations on the possible source of the analysis showed that the Duval triangle method, used in the analysis of the concentration of gases dissolved in oil samples taken from bushings, more reliably and unambiguously than the ratio method recommended in the IEC 60599 Standard, indicated a phenomenon which was identified in the insulation structure of bushings analyzed. Additionally, the results from DGA were found to be consistent with an internal inspection of bushings, which showed a visible trace of discharge on the inside part of the epoxy housing, as a result of the lightning induced breakdown. |
| first_indexed | 2024-03-10T13:55:05Z |
| format | Article |
| id | doaj.art-49916d8ce8be454cba08e6774dcec798 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T13:55:05Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-49916d8ce8be454cba08e6774dcec7982023-11-21T01:40:57ZengMDPI AGEnergies1996-10732020-12-011324671310.3390/en13246713Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case StudyTomasz Piotrowski0Pawel Rozga1Ryszard Kozak2Zbigniew Szymanski3Institute of Electrical Power Engineering, Lodz University of Technology, Stefanowskiego 18/22, 90-924 Lodz, PolandInstitute of Electrical Power Engineering, Lodz University of Technology, Stefanowskiego 18/22, 90-924 Lodz, PolandZrew Transformers S.A., Rokicinska 144, 92-412 Lodz, PolandEnergopomiar-Elektryka, Swietokrzyska 2, 44-100 Gliwice, PolandThe article describes a case study when the voltage collapse during lightning impulse tests of new power transformers was noticed and when the repeated tests finished with a positive result. The step-by-step process of reaching the conclusion on the basis of dissolved gas analysis (DGA) as a key method of the investigations was presented. The considerations on the possible source of the analysis showed that the Duval triangle method, used in the analysis of the concentration of gases dissolved in oil samples taken from bushings, more reliably and unambiguously than the ratio method recommended in the IEC 60599 Standard, indicated a phenomenon which was identified in the insulation structure of bushings analyzed. Additionally, the results from DGA were found to be consistent with an internal inspection of bushings, which showed a visible trace of discharge on the inside part of the epoxy housing, as a result of the lightning induced breakdown.https://www.mdpi.com/1996-1073/13/24/6713dissolved gas analysisoil-paper insulationhigh voltage bushing |
| spellingShingle | Tomasz Piotrowski Pawel Rozga Ryszard Kozak Zbigniew Szymanski Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case Study Energies dissolved gas analysis oil-paper insulation high voltage bushing |
| title | Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case Study |
| title_full | Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case Study |
| title_fullStr | Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case Study |
| title_full_unstemmed | Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case Study |
| title_short | Using the Analysis of the Gases Dissolved in Oil in Diagnosis of Transformer Bushings with Paper-Oil Insulation—A Case Study |
| title_sort | using the analysis of the gases dissolved in oil in diagnosis of transformer bushings with paper oil insulation a case study |
| topic | dissolved gas analysis oil-paper insulation high voltage bushing |
| url | https://www.mdpi.com/1996-1073/13/24/6713 |
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