Browse > Article
http://dx.doi.org/10.14346/JKOSOS.2018.33.6.58

A Study on the Application of Ultrasonic Testing for The Interface Integrity Evaluation between Iron and Cement of Porcelain Insulator Cap  

Yoon, Young Geun (Department of Safety Engineering, Incheon National University)
Choi, In Hyuk (KEPCO Research Institute)
Son, Ju Am (KEPCO Research Institute)
Oh, Tae Keun (Department of Safety Engineering, Incheon National University)
Publication Information
Journal of the Korean Society of Safety / v.33, no.6, 2018 , pp. 58-65 More about this Journal
Abstract
The life span of the porcelain insulator was made to be 30 years, but currently many of the 154kV NGK porcelain insulators using in Korea are found to have passed the production life. Accidents caused by aged mechanical breakdown can lead to disruption of power supply in some areas, large economic losses, and casualties. Therefore, ultrasonic method, which is one of the non - destructive test methods, is applied as a method for evaluating the integrity of porcelain insulators. In this study, the experiment on the interface of cap was conducted and the difference between the energy difference and the attenuation coefficient of the reflected wave was derived according to the interface state of the steel - cement. The results of this study are expected to be used as the basic data of the ultrasonic testing to evaluate the interface condition of the porcelain insulator cap.
Keywords
porcelain insulator; ultrasonic testing; interface integrity evaluation; attenuation coefficient; reflected energy;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 I. H. Choi, T. K. Kim, Y. B. Yoon, J. Yi and S. W. Kim, "Lifetime Assessments on 154 kV Transmission Porcelain Insulators with a Bayesian Approach", J. Korean Inst. Electr. Electron. Mater. Eng., Vol. 30, No. 9, pp. 551-557, 2017.   DOI
2 J. S. T. Looms, "Insulators for High Voltages", IEE Series, 1988.
3 S. C. Kim and T. Y. Kim, "Application Trends and Technology Trends of Domestic and Foreign Suspension Insulators", The Korean Institute of Electrical Engineers, Vol. 48, No. 12, pp. 22-26, 1999.
4 I. H. Choi, J. Y. Park and D. H. Kang, " Technology Status of Transmission Insulator", KEPCO Journal on Electric Power and Energy, Vol. 2, No. 3, pp. 365-375, 2016.   DOI
5 W. K. Lee, I. H. Choi, K. C. Hwang and H. Y. Choi, "A Study on Life Expectancy Forecast for Porcelain Insulators", The Transactions of the Korean Institute of Electrical Engineers, Vol. 2008, No. 7, pp. 16-18, 2008.
6 H. G. Jo, D. H. Han and I. H. Choi, "Degradation and Diagnosis Technology of Ultra High Voltage Insulator "Transfer Insulator", Journal of the Korean Institute of Electrical and Electronic Material Engineers, Vol. 17, No. 3, pp. 32-39, 2004.
7 I. H. Choi, J. H. Choi, Y. H. Jung, D. I. Lee and T. Y. Kim, "Characteristic Test on the Leakage Current of Transmission Insulators", The Transactions of the Korean Institute of Electrical Engineers, Vol. 2003, No. 7, pp. 479-481, 2003.
8 J. J. Park, "Analysis of Leakage Current Waveforms for Transmission Line Porcelain Insulators due to ESDD Contamination", The Transactions of the Korean Institute of Electrical Engineers, Vol. 61, No. 10, pp. 1461-1470, 2012.   DOI
9 L. Chen and J. Q. Wang, "Related Problems in Ultrasonic Detection of Porcelain Insulator", 17th World Conference on Nondestructive Testing, No. 23, pp. 25-28, 2008.
10 J. Y. Cho, S. G. Ji, J. W. Han, H. S. Ahn, T. W. Kim, I. H. Choi and C. Park, "Microstructure based Evaluation of Degradation of Aged Porcelain Suspension Insulators used in Transmission Line", The Transactions of the Korean Institute of Electrical Engineers, Vol. 2017, No.7, pp. 1165-1166, 2017.
11 S. I. Park and N. Y. Chung, "Measurement of Crack Length by Ultrasonic Attenuation Coefficients on Interfaces of Al/Epoxy Bonded Dissimilar Materials", The Korean Society of Mechanical Engineers, Vol. 2003, No. 11, pp. 1109-1114, 2003.
12 N. Y. Chung, "Measurement of Interfacial Crack Length by Ultrasonic Scattering Compensation Depending on Thickness Variations of Bonded Dissimilar Components", Transactions of KSAE, Vol. 14, No. 2, pp. 67-75, 2006.
13 R. S. Dwyer-Joyce, B. W. Drinkwater and A. M. Quinn, "The Use of Ultrasound in the Investigation of Rough Surface Interfaces", Transactions of the ASME, Vol. 123, pp. 8-16, 2001.   DOI
14 P. B. Nagy "Ultrasonic Classification of Imperfect Interfaces", Journal of Nondestructive Evaluation, Vol. 11, No. 3/4, pp. 127-139, 1992.   DOI
15 "Ultrasonic Testing of Materials at Level 2," A Technical Document Issued by the International Atomic Energy Agency, Vienna, Iaea-Tecdoc-462, 1988.
16 W. Chen, R. Mills and R. S. Dwyer-Joyce "Direct Load Monitoring of Rolling Bearing Contacts using Ultrasonic Time of Flight", Proc. R. Soc. A: Mathematical, Physical and Engineering, Vol. 471, pp. 1-21, 2015.
17 B. Mojskerc and T. Kek, J. Grum "Pulse-Echo Ultrasonic Testing of Adhesively Bonded Joints in Glass Facades", Journal of Mechanical Engineering, Vol. 62, No. 3, pp. 147-153, 2016.   DOI
18 L. W. Schmerr, "Fundamentals of Ultrasonic Nondestructive Evaluation", Plenum Press, 1998.
19 J. M. Baik and R. B. Thompson, "Ultrasonic Scattering from Imperfect Interfaces : A Quasi-Static Model", Journal of Nondestructive Evaluation, Vol. 4, No. 3/4, pp. 177-196, 1984.   DOI
20 D. R. Kim, S. Y. Lim and S. G. Chung, "A Debonding Detection Technique for FRP/Rubber Interface by Ultrasonic Phase Reversal", The Korean Society of Propulsion Engineers, Vol. 13, No. 2, pp. 9-16, 2009.
21 B. C. Woo, S. W. Han and H. G. Cho, "Stress Response of Cement Interface on Manufacturing Process of a Suspension Insulator", The Transactions of the Korean Institute of Electrical Engineers, pp. 1448-1450, 2003.
22 M. A GONI RODRIGO, "The Ultrasonic Pulse-Echo Immersion Technique And Attenuation Coeeficient Of Particulate Composites", University of Rhode Island Press, London, pp. 65-69, 2013.
23 Y. G. Young, I. B. Lee, M. H. Sa and T.K. Oh, "A Study on the Statistical Distribution of Ultrasonic Velocities for the Condition Evaluation of Concrete Wide Beam", J. Korean Soc. Saf., Vol. 32, No. 2, pp. 98-104, 2017.   DOI
24 M. H. Sa, Y. G. Young, I. B. Lee and T. K. Oh, "A Study on the Statistical Distribution of Rebound Number and Ultrasonic Pulse Velocity in RC and PSC Concrete Structures", J. Korean Soc. Saf., Vol. 32, No. 4, pp. 53-58, 2017.   DOI