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http://dx.doi.org/10.5207/JIEIE.2003.17.4.050

Detecting Characteristics of Ultrasonics Generated by Partial Discharge in Insulating Oil Using the Optical Fiber Mach-Zehnder Interferometer  

이상훈 (영남대학교)
심승환 (영남대학교 전기공학과)
이광식 (영남대학교 전기공학과)
김달우 (RIST 센서계측연구팀, 포항공대 물리학과)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.17, no.4, 2003 , pp. 50-56 More about this Journal
Abstract
It is well known that a partial-discharge(PD) in insulation oil is the source of various physical and chemical phenomena, such as heat, light, gas, chemical transformation, electric current, electromagnetic radiation and ultrasonics. The PD can be detected by measuring one of these changes. Although some techniques are employed in this purpose, several obstacles interfere with an on-line measurement. Ultrasonic-wave detection is a useful method for the diagnosis of the transformer-insulation condition. Conventionally, ulyrasonic waves are detected by Piezo-electric transducer, but we use optical method that has many advantages. In this paper, we constructed a Mach-Zehnder interferometer with optical fiber and investigated the principle of operation. Test arrangement is based on the needle-plane electrode system in oil and applied AC high voltage. Ultrasonic waves were detected and analyzed with wavelet transform.
Keywords
Mach-Zehnder interferometer; optical fiber; ultrasonics; wavelet; FFT; insulation oil;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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