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| Content Provider | IET Digital Library |
|---|---|
| Author | Wang, Yongqiang Zhang, Xia Jiang, Xiaolei Wang, Yunjia |
| Abstract | To investigate the effect of aging on surface discharge of the pressboard on the shielding electrode at the end of bushing, a thermal aging preparation methods of different aging degrees of pressboard samples, surface defect model, and the associated hemisphere are designed and the step-up method is used for subsequent experimental work. Finally, the partial discharges (PDs) under different degrees of aging are compared and combined with Fourier Transform Infrared spectra and electric field simulation. Results show that the pre-discharge occurs mainly in the oil gap between the hemispherical electrode edge and the pressboard. The aging of the pressboard exerts no obvious effect on the discharge characteristics in the initial stage of PD; with the development of the discharge, the development of aging of pressboard leads to a higher electric field intensity acting over a greater area, the more intense the discharge, the faster the relative discharge increases and the larger its amplitude. This discharge will cause decomposition of the oil in the pores of the aging pressboard thus generating gas bubbles which will move as discharge develops. When the bubbles reach the surface of the pressboard, the local electric field intensity will increase and the discharge will become more intense. |
| Starting Page | 729 |
| Ending Page | 736 |
| Page Count | 8 |
| ISSN | 17518822 |
| Volume Number | 13 |
| e-ISSN | 17518830 |
| Issue Number | Issue 5, Jul (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-smt/13/5 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5138 |
| Journal | IET Science, Measurement & Technology |
| Publisher Date | 2019-02-28 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Ageing Aging Pressboard Bubbles Bushing Electric Field Intensity Electric Field Simulation Electrode Fourier Transform Infrared Spectra Gas Bubble Generation Gas Discharges Hemispherical Electrode Edge Hemispherical Surface Model Local Electric Field Intensity Oil Gap Oil-paper Insulation Aging Organic Insulation Paper Partial Discharge Characteristic Partial Discharges Power Transformer Insulation Pressboard Sample Pressboard Surface Relative Discharge Shielding Electrode Surface Defect Model Surface Discharge Surface Discharges Thermal Aging Preparation Method Transformer And Reactors Transformer Oil |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering |
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