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| Content Provider | IET Digital Library |
|---|---|
| Author | Yu, Yu Wang, Ke Yang, Yan Li, Gang Wu, Guangning Li, Jinzhong Gao, Bo |
| Abstract | The flashover voltage of high temperature vulcanised (HTV) silicone rubber will be decreased after corona ageing, and it further decreases under the effect of mineral oil. The mechanisms for the phenomena can be explained by considering the role of trap level distribution. In this study, the corona ageing of silicone rubber was conducted and the flashover voltage was tested. The isothermal surface potential decay was tested to explore the internal relationship between trap distribution and flashover voltage. Besides, the surface microtopography and chemical structure of silicone rubber were gained by scanning electron microscopy and Fourier infrared spectroscopy to explain the change of trap distribution. The test results show that the flashover voltage of HTV silicone rubber decreases with AC corona ageing time, the reduction of flashover voltage for an oil-impregnated sample is more serious. The density of shallow electron traps increases at first and then decreases, while the density of shallow hole traps increases with ageing time. The density of deep traps decreases after corona ageing. These trap level distribution characteristics are beneficial to promote the development of flashover, leading to lower flashover voltage. The effect of mineral oil can be regarded as an accelerated ageing effect. |
| Starting Page | 5498 |
| Ending Page | 5504 |
| Page Count | 7 |
| ISSN | 17518687 |
| Volume Number | 14 |
| e-ISSN | 17518695 |
| Issue Number | Issue 23, Dec (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-gtd/14/23 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2020.0112 |
| Journal | IET Generation, Transmission & Distribution |
| Publisher Date | 2020-09-14 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | AC Corona Ageing Time Accelerated Ageing Effect Ageing Chemical Structure Connector Corona Deep Traps Decreases Electron Traps Flashover Fourier Transform Spectra Heat And Thermomechanical Treatments Hole Traps HTV Silicone Rubber Infrared Spectra Insulator Lower Flashover Voltage Mineral Oil Organic Insulation Power Line Supports Scanning Electron Microscopy Shallow Electron Traps Increases Silicone Rubber Solid Surface Structure Surface Potential Trap Distribution Trap Level Distribution Characteristic Vulcanisation |
| Content Type | Text |
| Resource Type | Article |
| Subject | Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering |
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