A study on the diagnosis for power transformer by Ultrasonic wave detection

The objectives of this study is to develop a device which could diagnose periodically the degradation of power transformer using ultrasonic signal through ultrasonic transducer attached surface of power transformer. And also it makes possible to reduce power failure time due to the power transformer fault and makes power system more reliable. Ultrasonic diagnostic device for power transformer was developed through this study. The developed device will contributed to early detection of fault and its location in the power transformer while it is operated, and also to extension of transformer life cycle, localization of this device will be reduced it's cost down compared with off shore. This device consisted of a new diagnostic algorithm is well suited for the power transformer which could found out some fault during the operation of on line monitoring system. This system could be extended to the general industrial plant utilizing the accumulated diagnostic technique.