| Title |
Development of an Algorithm for Distinguishing Between Transmitted and Reflected Ultrasonic Signals Using A Hybrid Transmission and Reception Method with Non-Contact Ultrasonic Measurement Technology |
| Authors |
강해권(Hae-Gweon Kang) ; 한가람(Ga-Ram Han) ; 전정채(Jeong-Chay Jeon) ; 방준호(Jun-Ho Bang) |
| DOI |
https://doi.org/10.5370/KIEE.2024.73.11.2113 |
| Keywords |
Ultrasonic; Cast-resin Transformer; Transmission Wave; Reflective Wave; Time of Flight |
| Abstract |
Although technologies that allow the detection of abnormalities in high voltage electrical installations without power interruption are being applied, there are limitations in clearly determining facility faults. In particular, molded-type electrical equipment has a structure that completely seals internal components from the outside, making it difficult to detect internal anomalies. Therefore, it is challenging to detect early internal faults using existing power-on diagnostic method. In response, a new diagnostic method has been introduced that utilizes ultrasound to penetrate epoxy insulation and estimate the internal temperature of high-voltage molded-type transformer windings, along with a non-contact ultrasonic measurement technology. This paper, based on previous research, develops an algorithm for distinguishing between transmitted and reflected ultrasonic signals using a hybrid transmission and reception method with non-contact ultrasonic measurement technology. The performance of the algorithm was verified using high-voltage winding samples from a molded transformer specially fabricated for the experiment. |