초음파 센서를 이용한 변압기 예방진단 기술 연구 = Technique of Transformer Diagnosis Using Ultrasonic Sensor

다국어 초록 (Multilingual Abstract)

This paper presents a diagnosis teclmique using ultrasonic sensors for monitoring the growth of partial discharge in power transformers. This teclmique counts the ultrasonic pulses generated from partial discharge over a threshold leveL In experiments, a ultrasonic generator and the point to plane electrodes generated ultrasonic pulses. With a constant voltage between the electrodes, the ultrasonic pulses over a threshold were a fairly constant. When the voltage increased or insulation paper was inserted between the electrodes, the partial discharge increased. In this case the number of ultrasonic pulses also increased and therefore the proposed teclmiques successfully diagnosed the growth of partial discharge.