Diffusion Characteristics of Dissolved Gases in Oil Under Different Oil Flow Circulations
The prediction of dissolved gas concentrations in oil can provide crucial data for the assessment of power transformer conditions and early fault diagnosis. Current simulations mainly focus on the generation and accumulation of characteristic gases, lacking a global perspective on gas diffusion and...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/18/2/432 |
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| _version_ | 1832588596422377472 |
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| author | Chuanxian Luo Ye Zhu Zhuangzhuang Li Peng Yu Zhengqin Zhou Xu Yang Minfu Liao |
| author_facet | Chuanxian Luo Ye Zhu Zhuangzhuang Li Peng Yu Zhengqin Zhou Xu Yang Minfu Liao |
| author_sort | Chuanxian Luo |
| collection | DOAJ |
| description | The prediction of dissolved gas concentrations in oil can provide crucial data for the assessment of power transformer conditions and early fault diagnosis. Current simulations mainly focus on the generation and accumulation of characteristic gases, lacking a global perspective on gas diffusion and dissolution. This study simulates the characteristic gases produced by typical faults at different flow rates. Using ANSYS 2022 R1 simulation software, a gas–liquid two-phase model is established to simulate the flow and diffusion of characteristic gases under fault conditions. Additionally, a fault-simulation gas production test platform was built based on a ±400 kV actual converter transformer. The experimental data show good consistency with the simulation trends. The results indicate that the diffusion of dissolved gases in oil is significantly affected by the oil flow velocity. At higher flow rates, the characteristic gases primarily move within the oil tank along with the oil circulation, leading to a faster rate of gas dissolution in oil and a shorter time to reach equilibrium within the tank. At lower flow rates, the diffusion of characteristic gases depends not only on oil flow circulation but also on self-diffusion driven by concentration gradients, resulting in a nonlinear change in gas concentration across various monitoring points. |
| format | Article |
| id | doaj-art-fd1242ee14b340a1a56ceaad5fc2c09c |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj-art-fd1242ee14b340a1a56ceaad5fc2c09c2025-01-24T13:31:28ZengMDPI AGEnergies1996-10732025-01-0118243210.3390/en18020432Diffusion Characteristics of Dissolved Gases in Oil Under Different Oil Flow CirculationsChuanxian Luo0Ye Zhu1Zhuangzhuang Li2Peng Yu3Zhengqin Zhou4Xu Yang5Minfu Liao6NARI Group Corporation, State Grid Electric Power Research Institute, Nanjing 211000, ChinaNARI Group Corporation, State Grid Electric Power Research Institute, Nanjing 211000, ChinaState Grid Shandong Electric Power Research Institute, Jinan 250021, ChinaSchool of Electrical Engineering, Dalian University of Technology, Dalian 116000, ChinaNARI Group Corporation, State Grid Electric Power Research Institute, Nanjing 211000, ChinaNARI Group Corporation, State Grid Electric Power Research Institute, Nanjing 211000, ChinaSchool of Electrical Engineering, Dalian University of Technology, Dalian 116000, ChinaThe prediction of dissolved gas concentrations in oil can provide crucial data for the assessment of power transformer conditions and early fault diagnosis. Current simulations mainly focus on the generation and accumulation of characteristic gases, lacking a global perspective on gas diffusion and dissolution. This study simulates the characteristic gases produced by typical faults at different flow rates. Using ANSYS 2022 R1 simulation software, a gas–liquid two-phase model is established to simulate the flow and diffusion of characteristic gases under fault conditions. Additionally, a fault-simulation gas production test platform was built based on a ±400 kV actual converter transformer. The experimental data show good consistency with the simulation trends. The results indicate that the diffusion of dissolved gases in oil is significantly affected by the oil flow velocity. At higher flow rates, the characteristic gases primarily move within the oil tank along with the oil circulation, leading to a faster rate of gas dissolution in oil and a shorter time to reach equilibrium within the tank. At lower flow rates, the diffusion of characteristic gases depends not only on oil flow circulation but also on self-diffusion driven by concentration gradients, resulting in a nonlinear change in gas concentration across various monitoring points.https://www.mdpi.com/1996-1073/18/2/432oil-immersed transformerdissolved gas in oilgas–liquid two-phase flow |
| spellingShingle | Chuanxian Luo Ye Zhu Zhuangzhuang Li Peng Yu Zhengqin Zhou Xu Yang Minfu Liao Diffusion Characteristics of Dissolved Gases in Oil Under Different Oil Flow Circulations Energies oil-immersed transformer dissolved gas in oil gas–liquid two-phase flow |
| title | Diffusion Characteristics of Dissolved Gases in Oil Under Different Oil Flow Circulations |
| title_full | Diffusion Characteristics of Dissolved Gases in Oil Under Different Oil Flow Circulations |
| title_fullStr | Diffusion Characteristics of Dissolved Gases in Oil Under Different Oil Flow Circulations |
| title_full_unstemmed | Diffusion Characteristics of Dissolved Gases in Oil Under Different Oil Flow Circulations |
| title_short | Diffusion Characteristics of Dissolved Gases in Oil Under Different Oil Flow Circulations |
| title_sort | diffusion characteristics of dissolved gases in oil under different oil flow circulations |
| topic | oil-immersed transformer dissolved gas in oil gas–liquid two-phase flow |
| url | https://www.mdpi.com/1996-1073/18/2/432 |
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