Artificial Neural Network Algorithm for Condition Monitoring of DC-link Capacitors Based on Capacitance Estimation

Hammam Abdelaal Hammam Soliman, Huai Wang, Brwene Salah Abdelkarim Gadalla, Frede Blaabjerg


In power electronic converters, reliability of DC-link capacitors is one of the critical issues. The estimation of their health status as an application of condition monitoring have been an attractive subject for industrial field and hence for the academic research filed as well. More reliable solutions are required to be adopted by the industry applications in which usage of extra hardware, increased cost, and low estimation accuracy are the main challenges. Therefore, development of new condition monitoring methods based on software solutions could be the new era that covers the aforementioned challenges. A capacitance estimation method based on Artificial Neural Network (ANN) algorithm is therefore proposed in this paper. The implemented ANN estimated the capacitance of the DC-link capacitor in a back-toback converter. Analysis of the error of the capacitance estimation is also given. The presented method enables a pure software based approach with high parameter estimation accuracy.


Capacitor condition monitoring; capacitor health status; Capacitance estimation.

Full Text:



S. Yang, D. Xiang, A. Bryant, P. Mawby, L. Ran, and P. Tavner, “Condition monitoring for device reliability in power electronic converters: A review,” IEEE Transactions on Power Electronics, vol. 25, no. 11, pp. 2734–2752, Nov 2010.

X.-S. Pu, T. H. Nguyen, D.-C. Lee, K.-B. Lee, and J.-M. Kim, “Fault diagnosis of dc-link capacitors in three-phase ac/dc pwm converters by online estimation of equivalent series resistance,” IEEE Transactions on Industrial Electronics, vol. 60, no. 9, pp. 4118–4127, Sept 2013.

H. Wang and F. Blaabjerg, “Reliability of capacitors for dc-link applications in power electronic converters-an overview,” IEEE Transactions on Industry Applications, vol. 50, no. 5, pp. 3569–3578, Sept 2014.

H. Soliman, H. Wang, and F. Blaabjerg, “A review of the condition monitoring of capacitors in power electronic converters,” in Electromotion Joint International Conference (ACEMP - OPTIM), 2015 IEEE, August 2015, pp. 243–249.

D.-C. Lee, K.-J. Lee, J.-K. Seok, and J.-W. Choi, “Online capacitance estimation of dc-link electrolytic capacitors for three-phase ac/dc/ac pwm converters using recursive least squares method,” in Proceedings of Electric Power Applications, vol. 152, no. 6, pp. 1503–1508, Nov 2005.

Y.-J. Jo, T. H. Nguyen, and D.-C. Lee, “Condition monitoring of submodule capacitors in modular multilevel converters,” in Energy Conversion Congress and Exposition (ECCE), 2014 IEEE, Sept 2014, pp. 2121–2126.

T. H. Nguyen and D.-C. Lee, “Deterioration monitoring of dc-link capacitors in ac machine drives by current injection,” IEEE Transactions on Power Electronics, vol. 30, no. 3, pp. 1126–1130, March 2015.

A. Wechsler, B. Mecrow, D. Atkinson, J. Bennett, and M. Benarous, “Condition monitoring of dc-link capacitors in aerospace drives,” IEEE Transactions on Industry Applications, vol. 48, no. 6, pp. 1866– 1874, Nov 2012.

A. Abo-Khalil and D.-C. Lee, “Dc-link capacitance estimation in ac/dc/ac pwm converters using voltage injection,” IEEE Transactions on Industry Applications, vol. 44, no. 5, pp. 1631–1637, Sept 2008.



  • There are currently no refbacks.

Copyright (c) 2016 Hammam Abdelaal Hammam Soliman, Huai Wang, Brwene Salah Abdelkarim Gadalla, Frede Blaabjerg

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Renewable Energy and Sustainable Development

E-ISSN: 2356-8569

P-ISSN: 2356-8518


Published by:

Academy Publishing Center (APC)

Arab Academy for Science, Technology and Maritime Transport (AASTMT)

Alexandria, Egypt