The impact of fusion welding in corrosion diagnosis of joint systems using ultrasonic technique

Document Type : Original Article


Electrical Engineer Department, Islamic Azad University, Urmia branch, Urmia, Iran


Nowadays the ultrasonic guide wave technique is the most accurate method in defect detection. Defect detection in the joined and continues systems make some measurement problems due to the structure and propagation of ultrasonic waves in these systems that must be considered for obtained accurate results. In this paper we analysis the manner and the effect of welded points in joint systems. For this aim we specially considered the grounding grids as a joint system and study the problem of the ultrasonic waves in corrosion diagnosis of this system. The grounding grids are the most important systems that increasing safety of power equipment in substations. The conductors of grounding grids usually connected together by fusion welding or bolts and nuts. But fusion welding make some problems for corrosion diagnosis of grounding grids and also pipelines while using ultrasonic technique. The main problem is incorrect results that obtained due to the interference of ultrasonic waves. This paper presented a new method to eliminating the effect of fusion welding points by placing the ultrasonic transducers in right locations. The influence of the soil is considered. Computer simulation results have shown the effect of this interference in accuracy of the result and effectiveness of the new method.


Ackerman, A., Sen, P. K., & Oertli, C. (2013). Designing safe and reliable grounding in AC substations with poor soil resistivity: An interpretation of IEEE Std. 80. IEEE Transactions on Industry Applications, 49(4), 1883-1889.
Ackerman, A., Sen, P. K., & Oertli, C. (2013). Designing safe and reliable grounding in AC substations with poor soil resistivity: An interpretation of IEEE std. 80. IEEE transactions on industry applications, 49(4), 1883–1889. doi:10.1109/tia.2013.2256092
Hu, J., Zeng, R., He, J., Sun, W., Yao, J., & Su, Q. (2002). Novel method of corrosion diagnosis for grounding grid. PowerCon 2000. 2000 International Conference on Power System Technology. Proceedings (Cat. No.00EX409). Perth, WA, Australia. doi:10.1109/icpst.2000.898168
Liu, J., Wang, J.-X., & Wang, S. (2006). A corrosion diagnosis approach for grounding grids based on Tabu search algorithm. 2006 International Conference on Machine Learning and Cybernetics. Παρουσιάστηκε στο 2006 International Conference on Machine Learning and Cybernetics, Dalian, China. doi:10.1109/icmlc.2006.258565
Long, X., Dong, M., Xu, W., & Li, Y. (2013). Online monitoring of substation grounding grid conditions using touch and step voltage sensors. 2013 IEEE Power & Energy Society General Meeting. Vancouver, BC. doi:10.1109/pesmg.2013.6672322
Xiaoling, Z., & Qingyang, H. (2002). Fault diagnosis of grounding grid of electric power plants and substations. Proceedings of the CSU-EPSA, 14, 48–51.
Zhang, X., & Chen, X. (2000). The technique of the optimization applied in the grounding grid’s failure diagnosis. High voltage engineering, 26, 64–66.
Yu, C., Fu, Z., Wu, G., Zhou, L., Zhu, X., & Bao, M. (2017). Configuration detection of substation grounding grid using transient electromagnetic method. IEEE transactions on industrial electronics (1982), 64(8), 6475–6483. doi:10.1109/tie.2017.2682033
Yu, C., Fu, Z., Hou, X., Tai, H.-M., & Su, X. (2015). Break-point diagnosis of grounding grids using transient electromagnetic apparent resistivity imaging. IEEE transactions on power delivery, 30(6), 2485–2491. doi:10.1109/tpwrd.2015.2403308
Lawson, V. R. (1988). Problems and detection of line anchor and substation ground grid corrosion. IEEE transactions on industry applications, 24(1), 25–32. doi:10.1109/28.87245
Shang, L., & Liang, W. (2015). Fault diagnosis of substation grounding grid based on the signal distance function. 2015 5th International Conference on Electric Utility Deregulation and Restructuring and Power Technologies (DRPT). Changsha, China. doi:10.1109/drpt.2015.7432529
Dawalibi, F. (1986). Electromagnetic fields generated by overhead and buried short conductors part 2-ground networks. IEEE Transactions on Power Delivery, 1(4), 112–119.
Zhang, X.-L., Zhao, X.-H., Wang, Y.-G., & Mo, N. (2010). Development of an electrochemical in situ detection sensor for grounding grid corrosion. Corrosion, 66(7), 076001-076001–076007. doi:10.5006/1.3462913
Lei, H. A. N., Shi-Zhe, S. O. N. G., Xiu-Li, Z. H. A. N. G., Yong-Li, L. I., & Zhi-Gang, Q. I. U. (2009). Development and application of a portable electrochemical device for diagnose of grounding grid corrosion. Corrosion Science and Protetion Technology, 21(3), 337–340.
Lord, W. (1990). Electromagnetic methods of defect detection. International Conference on Magnetics. International Conference on Magnetics, Brighton, UK. doi:10.1109/intmag.1990.734562
Gu, G., & Zhu, L. (2011). Modeling of rate-dependent hysteresis in piezoelectric actuators using a family of ellipses. Sensors and Actuators. A, Physical, 165(2), 303–309. doi:10.1016/j.sna.2010.09.020
Mudge, P. J. (2001). Teletest® Long Range Ultrasonic Testing Technique-Performance Details.
Sheard, M. (2001). Field experience of using long-range ultrasonic testing. Insight, 43(2), 73–83.
Alleyne, D. N., & Cawley, P. (1996). The excitation of Lamb waves in pipes using dry-coupled piezoelectric transducers. Journal of Nondestructive Evaluation, 15(1), 11–20. doi:10.1007/bf00733822