Ultrasonic-detecting Characteristics by Partial Discharge using the Fiber Mach-Zehnder Interferometerin Insulating Oil

광섬유 Mach-Zehnder 간섭계를 이용한 부분방전 초음파 검출특성

The partial-discharge(PD) is accompanied by physical and chemical phenomena, such as heat, light, noise, gas, chemical transformation, electric current, and electromagnetic radiation. 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. Now a fiber-optic sensor for detecting ultrasonics is suggested for the on line measurement system with high accuracy. In this paper, an optical fiber sensor utilizing the principal of Mach-Zehnder interferometer was proposed to detect the discharge signal.