Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Online monitoring method for submodule capacitors in modular multilevel converter based on cumulative sum detection of sliding window

  • Wei Lai (Department of Electrical Engineering, Chongqing University) ;
  • Jinbao Zhang (Department of Electrical Engineering, Chongqing University) ;
  • Dan Luo (Shinan Power Supply Branch, State Grid Chongqing Electric Power Company) ;
  • Hui Li (Department of Electrical Engineering, Chongqing University) ;
  • Anbin Liu (Department of Electrical Engineering, Chongqing University) ;
  • Minyou Chen (Department of Electrical Engineering, Chongqing University) ;
  • Hongjian Xia (Department of Electrical Engineering, Chongqing University)
  • Received : 2023.06.27
  • Accepted : 2023.12.22
  • Published : 2024.06.20
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Abstract

Modular multilevel converters (MMC) have the characteristics of high modularity, good availability and high-power quality. Thus, they are widely used in medium and high-power applications. To meet large capacity application requirements, a large number of capacitors is applied in parallel and series. However, capacitors are one of the most vulnerable components in MMCs. To identify abnormal capacitors, a condition monitoring method for capacitors is proposed in this paper using the cumulative sum detection of the sliding window algorithm. First, the bilateral cumulative sum algorithm of the sliding window is proposed to extract the switch-on time and switch-of time of the submodules (SMs). Second, the capacitance is calculated using the monitored capacitor voltage and arm current during the switch-on status. Finally, the accuracy and effectiveness of the proposed method are verified by an MMC system operating condition simulated experiment platform. The proposed condition monitoring method simplifies the calculation of capacitance with a high accuracy by removing the requirement of measuring the switching signal. In addition, it does not have an adverse influence on the normal operation of MMC systems.

Keywords

Acknowledgement

This work was supported by the China-State Corporation Joint Fund for Smart Grid under Grant U1966213, the Bidding Projects Announced by the Shanxi Provincial Department of Science and Technology under Grant 20201101017 and the National Key Laboratory of Electromagnetic Energy under Grant 61422172220203.

References

  1. Nami, A., Liang, J., Dijkhuizen, F., Demetriades, G.D.: Modular multilevel converters for HVDC applications: review on converter cells and functionalities. IEEE Trans. Power Electron. 30(1), 18-36 (2015) 
  2. Han, J., Bieber, L.M., Paull, J., Wang, L., Li, W., Paquin, J.N.: Real-time simulation of hybrid three-level and modular multilevel converter based on complete equivalent model for high voltage direct current transmission system. IEEE Open Access J. Power Energy. 9, 42-54 (2022) 
  3. Kaya, M., Costabeber, A., Watson, A.J., Tardelli, F., Clare, J.C.: A push-pull series connected modular multilevel converter for HVdc applications. IEEE Trans. Power Electron. 37(3), 3111-3129 (2022) 
  4. Wu, Y., Zhang, L., Zhou, Y., Hu, Z., Zhao, X., Zhuang, Q.: A hybrid HVDC converter based on MMC and diode rectifier for offshore wind farm integration. Int. Conf. Power Syst. Technol. 1476-1480 (2021) 
  5. Shinoda, K., Benchaib, A., Dai, J., Guillaud, X.: Virtual capacitor control: mitigation of DC voltage fluctuations in MMC-based HVDC systems. IEEE Trans. Power Deliv. 33(1), 455-465 (2018) 
  6. Xiang, W., Yang, S., Adam, G.P., Zhang, H., Zuo, W., Wen, J.: DC fault protection algorithms of MMC-HVDC grids: fault analysis, methodologies, experimental validations, and future trends. IEEE Trans. Power Electron. 36(10), 11245-11264 (2021) 
  7. Li, K., Yuan, L., Zhao, Z., Lu, S., Zhang, Y.: Fault-tolerant control of MMC with hot reserved submodules based on carrier phase shift modulation. IEEE Trans. Power Electron. 32(9), 6778-6791 (2017) 
  8. Peng, C., Li, R., Cai, X.: Reverse blocking devices based three-level mmc sub-module topology with DC side fault blocking capability. IEEE Trans. Power Deliv. 37(3), 1866-1875 (2022) 
  9. Wechsler, A., Mecrow, B.C., Atkinson, D.J., et al.: Condition monitoring of DC-link capacitors in aerospace drives. IEEE Trans. Ind. Appl. 48(6), 1866-1874 (2012) 
  10. Buiatti, G.M., Martin-Ramos, J.A., Amaral, A.M.R.: Condition monitoring of metallized polypropylene film capacitors in railway power trains. IEEE Trans. Instrum. Meas. 58(10), 3796-3805 (2009) 
  11. Ahmad, M.W., Kumar, P.N., Arya, A., et al.: Noninvasive technique for DC-link capacitance estimation in single-phase inverters. IEEE Trans. Power Electron. 33(5), 3693-3696 (2018) 
  12. Vogelsberger, M.A., Wiesinger, T., Ertl, H.: Life-Cycle Monitoring and Voltage-Managing Unit for DC-Link Electrolytic Capacitors in PWM Converters. IEEE Trans. Power Electron. 26(2), 493-503 (2011) 
  13. Jo, Y., Nguyen, T.H., Lee, D.: Condition monitoring of submodule capacitors in modular multilevel converters. IEEE Energy Convers. Congr. Expo. 2121-2126 (2014) 
  14. Deng, F., Heng, Q., Liu, C., Cai, X., Zhu, R., Chen, Z., Chen, W.: Capacitor ESR and C monitoring in modular multilevel converters. IEEE Trans. Power Electron. 35(4), 4063-4075 (2020) 
  15. Wang, Z., Zhang, Y., Wang, H., Blaabjerg, F.: Capacitor condition monitoring based on the DC-side start-up of modular multilevel converters. IEEE Trans. Power Electron. 35(6), 5589-5593 (2020) 
  16. Xin, X., Ma, K., Cai, X.: Online monitoring for sub-module capacitance in modular multilevel converter with four sampling points of capacitor voltage. Proc. CSEE. 41(11), 3896-3904 (2021) 
  17. Zhang, J., Hu, X., Xu, S., Zhang, Y., Chen, Z.: Fault diagnosis and monitoring of modular multilevel converter with fast response of voltage sensors. IEEE Trans. Ind. Electron. 67(6), 5071-5080 (2020) 
  18. Geng, Z., Han, M., Zhou, G.: Switching signals based condition monitoring for submodule capacitors in modular multilevel converters. IEEE Trans. Circuits Syst. II Express Briefs. 68(6), 2017-2021 (2021) 
  19. Liu, C., Deng, F., Yu, Q., Wang, Y., Blaabjerg, F., Cai, X.: Submodule capacitance monitoring strategy for phase-shifted carrier pulse width-modulation-based modular multilevel converters. IEEE Trans. Ind. Electron. 68(9), 8753-8767 (2021) 
  20. Ronanki, D., Williamson, S.S.: Failure prediction of submodule capacitors in modular multilevel converter by monitoring the intrinsic capacitor voltage fluctuations. IEEE Trans. Ind. Electron. 67(4), 2585-2594 (2020) 
  21. Wang, H., Wang, H., Wang, Z., Zhang, Y., Pei, X., Kang, Y.: Condition monitoring for submodule capacitors in modular multilevel converters. IEEE Trans. Power Electron. 34(11), 10403-10407 (2019) 
  22. Abushafa, O., Gadoue, S., Dahidah, M., Atkinson, D.: A new scheme for monitoring submodule capacitance in modular multilevel converter. 8th IET Int. Conf. Power Electron. 1-6 (2016) 
  23. Sun, Y., Wang, M., Ran, L.: Capacitance monitoring method for metallized polypropylene film capacitor in MMC. IEEE Sustain. Power Energy Conf. 2431-2436 (2019) 
  24. Soliman, H., Abdelsalam, I., Wang, H., Blaabjerg, F.: Artificial neural network based dc-link capacitance estimation in a diode-bridge front-end inverter system. IEEE 3rd Int. Future Energy Electron. Conf. 196-201 (2017) 
  25. Soualhi, A., Makdessi, M., German, R., Echeverria, F.R., Razik, H., Sari, A., Venet, P., Clerc, G.: Heath monitoring of capacitors and supercapacitors using the neo-fuzzy neural approach. IEEE Trans. Ind. Inform. 14(1), 24-34 (2018) 
  26. Shrivastava, A., Azarian, M.H., Pecht, M.: Failure of polymer aluminum electrolytic capacitors under elevated temperature humidity environments. IEEE Trans. Compon. Packag. Manuf. Technol. 7(5), 745-750 (2017) 
  27. Valentine, N., Azarian, M.H., Pecht, M.: Metallized film capacitors used for EMI filtering: A reliability review. Microelectron. Reliab. 92, 123-135 (2019) 
  28. Wang, H., Wang, H.: Reliability evaluation and optimization of capacitor bank. 2018 IEEE Energy Convers. Congr. Expo. 7386-7390 (2018) 
  29. Wang, H., Yang, Y., Blaabjerg, F.: Reliability-oriented design and analysis of input capacitors in single-phase transformer-less photovoltaic inverters. IEEE. APEC. 2929-2933(2013) 
  30. Wang, H., Davari, P., Wang, H., et al.: Lifetime estimation of DC-link capacitors in adjustable speed drives under grid voltage unbalances. IEEE Trans. Power Electron. 34(5), 4064-4078 (2019) 
  31. Tang, Y., Ran, L., Alatise, O., Mawby, P.: Improved testing capability of the model-assisted testing scheme for a modular multilevel converter. IEEE Trans. Power Electron. 31(11), 7823-7836 (2016)