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http://dx.doi.org/10.4313/JKEM.2013.26.4.309

Optimal Design of an Antenna for the Detection of Partial Discharges in Insulation Oil  

Lee, Jung-Yoon (EMI Tech. Co. Ltd.)
Jo, Hyang-Eun (Division of Electrical and Electronics Engineering, Korea Maritime University)
Park, Dae-Won (Division of Electrical and Electronics Engineering, Korea Maritime University)
Kil, Gyung-Suk (Division of Electrical and Electronics Engineering, Korea Maritime University)
Oh, Jae-Geun (National Forensic Service)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.26, no.4, 2013 , pp. 309-314 More about this Journal
Abstract
This paper dealt with the radiated electromagnetic wave detection of partial discharge (PD) in oil for insulation diagnostics of oil-immersed transformers. Three types of electrode system were fabricated to simulate the insulation defects that could occur in oil-immersed transformers. Frequency components of radiated electromagnetic wave in oil was measured by broadband bi-conical antennas of 300 MHz~2 GHz and a spectrum analyzer of 9 kHz~3 GHz. Frequency component of electromagnetic waves from PD in oil were highly distributed at 500 MHz. From the result, a narrow-band monopole antenna with the center frequency of 500 MHz was fabricated. We could detect PD signal in insulation oil without an influence of external noise by a measurement system which consists of the prototype monopole antenna, a LNA (Low Noise Amplifier), an oscilloscope and a spectrum analyzer.
Keywords
Electromagnetic wave; Partial discharge; Insulation diagnostics; Oil-immersed transformer; Frequency spectrum; Monopole antenna;
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Times Cited By KSCI : 2  (Citation Analysis)
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