| Title |
Application of the Ultrasonic Detection System for the Power Transformer |
| Authors |
권동진(Kweon, Dong-Jin) ; 구교선(Koo, Kyo-Sun) ; 김재철(Kim, Jae-Chul) |
| Keywords |
Ultrasonic ; Preventive Diagnosis ; Partial Discharge ; Power Transformer ; Location |
| Abstract |
This paper describes the application results of an ultrasonic detection system for the power transformer. The ultrasonic detection system with 6 sensors was applied to detect partial discharge in a 154kV transformer with a dangerous levels of C_{2}H_{2}, C_{2}H_4 and CH_{4} gases. The ultrasonic detection tests were carried out 2 times, respectively, to confirm the existence and location of the partial discharge in the transformer. As a result of internal inspection, the arc trace between the pressure ring and core due to the partial discharge was found at the estimated position based on the amplitude and arriving time of the ultrasonic signals. Therefore, it was verified that the ultrasonic detection system is effective as a preventive diagnosis method for the power transformer. Also, the reliability of the ultrasonic detection system in detecting partial discharges in the transformer was also confirmed. It is expected, therefore, that the ultrasonic detection system will have beneficial effects on applications and verifications in detecting partial discharges for the power transformer. |