Bubble migration characteristics in power transformer oil under coupled stresses of forced vibration and electrical field
Abstract The stresses existing in power transformers lead to the generation of bubbles. They are the primary source that worsens and leads to insulation failure. Due to the complexity of bubble dynamics, it is challenging to figure out bubble mechanisms. However, creation, migration, and accumulatio...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-05-01
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| Series: | IET Science, Measurement & Technology |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/smt2.12136 |
| _version_ | 1827954254847934464 |
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| author | Niyomugabo Emmanuel Ladislas Qingmin Li Qiushi Liu Wu Jie Huang Weimin |
| author_facet | Niyomugabo Emmanuel Ladislas Qingmin Li Qiushi Liu Wu Jie Huang Weimin |
| author_sort | Niyomugabo Emmanuel Ladislas |
| collection | DOAJ |
| description | Abstract The stresses existing in power transformers lead to the generation of bubbles. They are the primary source that worsens and leads to insulation failure. Due to the complexity of bubble dynamics, it is challenging to figure out bubble mechanisms. However, creation, migration, and accumulation mechanisms require further explanation. A set of experiments has been conducted to provide a scientific overview of bubbles. The results revealed that buoyancy is dominant in low electric fields, while high electric fields affect bubbles' rise. Bubbles stretch and oscillate while moving. When the electric field is not strong, the AC field reduces the duration and volume of bubble detachment. Vibration stress on the other side is leading the bubble motion including detachment frequency and migration speed. Under the combination of AC and vibration stresses, the bubble distortion degree aggravates and bubble gathering formation is easy. This research can provide a deeper acumen of the bubble's actions beneath a power transformer under a combination of vibration and electric fields. It provides essential technique parameters to deal with while investigating bubble's problems and related engineering research areas. |
| first_indexed | 2024-04-09T14:27:18Z |
| format | Article |
| id | doaj.art-862c53e9425d4be3a601ac8b331f997c |
| institution | Directory Open Access Journal |
| issn | 1751-8822 1751-8830 |
| language | English |
| last_indexed | 2024-04-09T14:27:18Z |
| publishDate | 2023-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Science, Measurement & Technology |
| spelling | doaj.art-862c53e9425d4be3a601ac8b331f997c2023-05-04T02:55:01ZengWileyIET Science, Measurement & Technology1751-88221751-88302023-05-0117312513510.1049/smt2.12136Bubble migration characteristics in power transformer oil under coupled stresses of forced vibration and electrical fieldNiyomugabo Emmanuel Ladislas0Qingmin Li1Qiushi Liu2Wu Jie3Huang Weimin4State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing ChinaState Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing ChinaElectric Power Research Institute State Grid Anhui Electric Power Company Hefei Anhui Province ChinaElectric Power Research Institute State Grid Anhui Electric Power Company Hefei Anhui Province ChinaAbstract The stresses existing in power transformers lead to the generation of bubbles. They are the primary source that worsens and leads to insulation failure. Due to the complexity of bubble dynamics, it is challenging to figure out bubble mechanisms. However, creation, migration, and accumulation mechanisms require further explanation. A set of experiments has been conducted to provide a scientific overview of bubbles. The results revealed that buoyancy is dominant in low electric fields, while high electric fields affect bubbles' rise. Bubbles stretch and oscillate while moving. When the electric field is not strong, the AC field reduces the duration and volume of bubble detachment. Vibration stress on the other side is leading the bubble motion including detachment frequency and migration speed. Under the combination of AC and vibration stresses, the bubble distortion degree aggravates and bubble gathering formation is easy. This research can provide a deeper acumen of the bubble's actions beneath a power transformer under a combination of vibration and electric fields. It provides essential technique parameters to deal with while investigating bubble's problems and related engineering research areas.https://doi.org/10.1049/smt2.12136bubbleselectric strengthpower transformer insulationvibration measurement |
| spellingShingle | Niyomugabo Emmanuel Ladislas Qingmin Li Qiushi Liu Wu Jie Huang Weimin Bubble migration characteristics in power transformer oil under coupled stresses of forced vibration and electrical field IET Science, Measurement & Technology bubbles electric strength power transformer insulation vibration measurement |
| title | Bubble migration characteristics in power transformer oil under coupled stresses of forced vibration and electrical field |
| title_full | Bubble migration characteristics in power transformer oil under coupled stresses of forced vibration and electrical field |
| title_fullStr | Bubble migration characteristics in power transformer oil under coupled stresses of forced vibration and electrical field |
| title_full_unstemmed | Bubble migration characteristics in power transformer oil under coupled stresses of forced vibration and electrical field |
| title_short | Bubble migration characteristics in power transformer oil under coupled stresses of forced vibration and electrical field |
| title_sort | bubble migration characteristics in power transformer oil under coupled stresses of forced vibration and electrical field |
| topic | bubbles electric strength power transformer insulation vibration measurement |
| url | https://doi.org/10.1049/smt2.12136 |
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