Field experience of transformer untanking to identify electrical faults and comparison with dissolved gas analysis
Power transformer consists of components which are under consistent thermal and electrical stresses. The major component which degrades under these stresses is the paper insulation of the power transformer. The life of the transformer is determined by the condition of the paper insulation. The degra...
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my.uniten.dspace-307532023-12-29T15:52:33Z Field experience of transformer untanking to identify electrical faults and comparison with dissolved gas analysis Samsudin R. Ramli A.Q. Berhanuddin A. Zaidey Y. 56004332500 35779000400 35777444200 35779334900 Arcing Dissolved gas analysis On Load Tap Changer (OLTC) Partial discharge Total dissolved combustible gas Dissolution Electric fault location Fault detection Gas chromatography Gases Load testing Oil filled transformers Pollution detection Power transformers Sustainable development Tanks (containers) Transformer substations Voltage control Analysis method Combustible gas Dissolved gas analysis Dissolved-gas-analysis techniques Electrical discharges Electrical faults Electrical stress Field experience Oil contamination On-load tap changers Paper insulation Partial discharge testing Physical inspection Tank design Partial discharges Power transformer consists of components which are under consistent thermal and electrical stresses. The major component which degrades under these stresses is the paper insulation of the power transformer. The life of the transformer is determined by the condition of the paper insulation. The degradation of the paper insulation will be accelerated with the presence of electrical fault. Electrical fault in power transformer can be categorized into two which are Partial Discharge (PD) and Arcing. A PD will eventually develop into arcing. Any electrical fault in the transformer can be detected by using Dissolved Gas Analysis technique. The DGA can be used to differentiate between the types of faults in the transformer. However, DGA alone is not conclusive in determining the electrical fault in the transformer. As a complement, acoustic partial discharge technique was used to detect the electrical fault in the transformer. In this paper, the detection of electrical fault in two units of 33/11kV, 15MVA transformers were done by using Dissolved Gas Analysis (DGA). Then, the acoustic partial discharge test was carried out to detect the activity and locate the source of the electrical fault. During the acoustic partial discharge testing, some electrical discharge signal was picked-up from On-Load Tap Changer (OLTC) tank. Then, the transformers were un-tanking for physical inspection. Based on the inspection done on two transformers, the DGA analysis methods were unable to detect the OLTC oil contamination in the main tank oil and it is very dependent on the transformer conservator tank design. The acoustic partial discharge technique proves to be a useful tool in detecting electrical discharges in the power transformer. �2009 IEEE. Final 2023-12-29T07:52:33Z 2023-12-29T07:52:33Z 2009 Conference paper 10.1109/ICEENVIRON.2009.5398629 2-s2.0-77949583026 https://www.scopus.com/inward/record.uri?eid=2-s2.0-77949583026&doi=10.1109%2fICEENVIRON.2009.5398629&partnerID=40&md5=11455f15080688fd7ae0fface2c25983 https://irepository.uniten.edu.my/handle/123456789/30753 5398629 299 305 Scopus |
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Arcing Dissolved gas analysis On Load Tap Changer (OLTC) Partial discharge Total dissolved combustible gas Dissolution Electric fault location Fault detection Gas chromatography Gases Load testing Oil filled transformers Pollution detection Power transformers Sustainable development Tanks (containers) Transformer substations Voltage control Analysis method Combustible gas Dissolved gas analysis Dissolved-gas-analysis techniques Electrical discharges Electrical faults Electrical stress Field experience Oil contamination On-load tap changers Paper insulation Partial discharge testing Physical inspection Tank design Partial discharges |
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Arcing Dissolved gas analysis On Load Tap Changer (OLTC) Partial discharge Total dissolved combustible gas Dissolution Electric fault location Fault detection Gas chromatography Gases Load testing Oil filled transformers Pollution detection Power transformers Sustainable development Tanks (containers) Transformer substations Voltage control Analysis method Combustible gas Dissolved gas analysis Dissolved-gas-analysis techniques Electrical discharges Electrical faults Electrical stress Field experience Oil contamination On-load tap changers Paper insulation Partial discharge testing Physical inspection Tank design Partial discharges Samsudin R. Ramli A.Q. Berhanuddin A. Zaidey Y. Field experience of transformer untanking to identify electrical faults and comparison with dissolved gas analysis |
| description |
Power transformer consists of components which are under consistent thermal and electrical stresses. The major component which degrades under these stresses is the paper insulation of the power transformer. The life of the transformer is determined by the condition of the paper insulation. The degradation of the paper insulation will be accelerated with the presence of electrical fault. Electrical fault in power transformer can be categorized into two which are Partial Discharge (PD) and Arcing. A PD will eventually develop into arcing. Any electrical fault in the transformer can be detected by using Dissolved Gas Analysis technique. The DGA can be used to differentiate between the types of faults in the transformer. However, DGA alone is not conclusive in determining the electrical fault in the transformer. As a complement, acoustic partial discharge technique was used to detect the electrical fault in the transformer. In this paper, the detection of electrical fault in two units of 33/11kV, 15MVA transformers were done by using Dissolved Gas Analysis (DGA). Then, the acoustic partial discharge test was carried out to detect the activity and locate the source of the electrical fault. During the acoustic partial discharge testing, some electrical discharge signal was picked-up from On-Load Tap Changer (OLTC) tank. Then, the transformers were un-tanking for physical inspection. Based on the inspection done on two transformers, the DGA analysis methods were unable to detect the OLTC oil contamination in the main tank oil and it is very dependent on the transformer conservator tank design. The acoustic partial discharge technique proves to be a useful tool in detecting electrical discharges in the power transformer. �2009 IEEE. |
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56004332500 |
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56004332500 Samsudin R. Ramli A.Q. Berhanuddin A. Zaidey Y. |
| format |
Conference paper |
| author |
Samsudin R. Ramli A.Q. Berhanuddin A. Zaidey Y. |
| author_sort |
Samsudin R. |
| title |
Field experience of transformer untanking to identify electrical faults and comparison with dissolved gas analysis |
| title_short |
Field experience of transformer untanking to identify electrical faults and comparison with dissolved gas analysis |
| title_full |
Field experience of transformer untanking to identify electrical faults and comparison with dissolved gas analysis |
| title_fullStr |
Field experience of transformer untanking to identify electrical faults and comparison with dissolved gas analysis |
| title_full_unstemmed |
Field experience of transformer untanking to identify electrical faults and comparison with dissolved gas analysis |
| title_sort |
field experience of transformer untanking to identify electrical faults and comparison with dissolved gas analysis |
| publishDate |
2023 |
| _version_ |
1806423526782009344 |
| score |
13.211869 |