| Autor: |
Chaojie, Zhu, Yi, Yin, Yuncai, Lu, Yijun, Fei |
| Zdroj: |
2012 IEEE International Conference on Condition Monitoring & Diagnosis; 1/ 1/2012, p1179-1182, 4p |
| Abstrakt: |
In recent years, ultra high frequency (UHF) method has become a widely used method to detect partial discharge (PD) in transformers. For this method, we should pay attention to two crucial problems: (i) How to detect the UHF signals radiated from PDs; (ii) How to confirm the PD locations accurately. In this paper, a new type of antenna, named multi-element monopole antenna or Goubau antenna, is introduced to the area of PD detection. The antenna was designed using electromagnetic simulation software. The simulation software computed return loss shows a reasonable agreement with tested data. Both of the results turn out that operating frequency range of the antenna is about 400–1000MHz. To study the influence brought by inner structures of transformer, the time-delay effects caused by core and winding respectively were simulated using FDTD method. It is concluded that time-delay effect caused by core is obvious, while the effect caused by winding is not. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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