基于特高频法检测电气设备局部放电的改进Vivaldi天线

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Abstract The designed antenna in this paper is used for detecting the ultra-high frequency (UHF) signal of partial discharge (PD) radiated from electrical equipment at substations. This paper modified the conventional Vivaldi antenna (CVA) based on the tapered slot antenna theory. A tapered slot edge with resonant cavity structure is embedded on the edge of the CVA. The simulation and measured results show that impedance bandwidth of the modified Vivaldi antenna (MVA) is extended from 1.2~3GHz to 0.5~3GHz. Directivity of the MVA is improved without changing the phase center. Gain and sensitivity of the MVA are both improved, where the maximum gain value is 7.9dBi (2GHz) and the average sensitivity value is higher than 12mm. A test platform is constructed in laboratory to verify the effect of the MVA. The test results show that the MVA is appropriate for detecting UHF PD signal. The MVA has higher detection sensitivity compared with the CVA, the ridged TEM horn antenna and the spiral antenna. The impulse response characteristic of time domain signal received by MVA is better, which is helpful for further data processing.

Key words： Electrical equipment partial discharge signal detection ultra-high frequency method Vivaldi antenna

Received: 01 September 2015 Published: 30 June 2017

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TM835

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	Zhou Wenjun
	Liu Yushun
	Li Pengfei
	Yu Jianhui

Cite this article:

Zhou Wenjun,Liu Yushun,Li Pengfei等. Modified Vivaldi Antenna Applied to Detect Partial Discharge in Electrical Equipment Based on Ultra-High Frequency Method[J]. Transactions of China Electrotechnical Society, 2017, 32(12): 259-267.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I12/259

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