Simulation of Influence of DC Pre-Stress on Space-Charge Characteristics of Cross-Linked Polyethylene in Inhomogeneous Field
| Autor: | Hechen Liu, Xiaobin Xu, Yun-Peng Liu, Shaoxin Meng, Zhanpeng Guo, Mingjia Zhang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | IEEE Access, Vol 8, Pp 121119-121126 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2169-3536 14732661 |
| DOI: | 10.1109/ACCESS.2020.3006916 |
| Popis: | Space charge is one of the main causes of electrical tree initiation in high-voltage cable insulation. To investigate the influence of DC pre-stress on the space-charge distribution of cross-linked polyethylene (XLPE), a two-dimensional needle-plate electrode model is established in this study. Based on the bipolar charge-transport model, the space-charge distribution characteristics of the needle-plate electrode model under DC pre-stress are simulated and analyzed. The space-charge distribution characteristics are compared with that of the grounded DC electrical tree initiation properties. The work in this study illustrates that the pre-stress time and value affect the space-charge distribution characteristics. There is a certain relationship between space-charge distribution characteristics and electrical tree initiation characteristics. The distribution range of the DC grounded electrical tree is very similar to that of space charge. Both have a similar distribution shape and increased trend under different pre-stress times, and both have an obvious polarity effect. |
| Databáze: | Directory of Open Access Journals |
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