A Generalized Space Vector Modulation for Cascaded H-Bridge Inverters under Faulty Conditions
Main Article Content
Abstract
In this research, a new space vector modulation control algorithm is proposed to increase the reliability and the accuracy of the cascaded H-bridge multilevel inverters in case of faulty situations where one or several power cells do not function. When one or more switches of a cell are opened or shorted, that cell is considered faulty. By giving a detailed analysis on the impact of the faulty power cells on the voltage space vectors, the inapplicable voltage vectors are removed precisely. Consequently, the optimal redundant switching states are chosen such that the highest possible output voltage can be achieved. In addition, the balance of the three phases line-to-line voltage and current are maintained. The proposed algorithm is also generalized so that it can be applied to any level of H-bridge inverters. The validity of the method is verified by numerical simulations using MATLAB Simulink with an 11-level cascaded H-bridge inverter.
Keywords
Cascaded H-bridge inverter, space vector modulation (SVM), fault tolerant operation of CHB multilevel inverters
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
References
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[2]. R. José et al., Multilevel converters: An enabling technology for high-poer applications, Proceedings of the IEEE, vol. 97, no. 11. pp. 1786–1817, 2009, https://doi: 10.1109/JPROC.2009.2030235.
[3]. J. S. Lai and F. Z. Peng, multilevel converters - A new breed of power converters, IEEE Transactions on Industry Applications, vol. 32, no. 3. pp. 509–517, 1996, https://doi: 10.1109/28.502161.
[4]. M. Marchesoni, M. Mazzucchelli, and S. Tenconi, A Nonconventional power converter for plasma stabilization, IEEE Transactions on Power Electronics, vol. 5, no. 2. pp. 212–219, 1990, https://doi: 10.1109/63.53158.
[5]. S. Kouro et al., Recent advances and industrial applications of multilevel converters, IEEE Transactions on Industrial Electronics, vol. 57, no. 8. pp. 2553–2580, 2010, https://doi: 10.1109/TIE.2010.2049719.
[6]. E. Villanueva, P. Correa, J. Rodriguez, and M. Pacas, Control of a single-phase cascaded H-bridge multilevel inverter for grid-connected photovoltaic systems, IEEE Trans. Ind. Electron., vol. 56, no. 11, pp. 4399–4406, 2009, https://doi: 10.1109/TIE.2009.2029579.
[7]. J. Sastry, P. Bakas, H. Kim, L. Wang, and A. Marinopoulos, Evaluation of cascaded H-bridge inverter for utility-scale photovoltaic systems, Renew. Energy, vol. 69, pp. 208–218, 2014, https://doi: 10.1016/j.renene.2014.03.049.
[8]. F. Khoucha, S. M. Lagoun, K. Marouani, A. Kheloui, and M. E. H. Benbouzid, Hybrid cascaded H-bridge multilevel-inverter induction-motor-drive direct torque control for automotive applications, IEEE Trans. Ind. Electron., vol. 57, no. 3, pp. 892–899, 2010, https://doi: 10.1109/TIE.2009.2037105.
[9]. B. Hemanth Kumar, M. M. Lokhande, R. R. Karasani, and V. B. Borghate, Fault tolerant operation of CHB multilevel inverters based on the SVM technique using an auxiliary unit, Journal of Power Electronics, vol. 18, no. 1. pp. 56–69, 2018, https://doi: 10.6113/JPE.2018.18.1.56.
[10]. B. P. McGrath, D. G. Holmes, and T. Lipo, Optimized space vector switching Sequences for multilevel inverters, IEEE Trans. Power Electron., vol. 18, no. 6, pp. 1293–1301, 2003, https://doi: 10.1109/TPEL.2003.818827.
[11]. T. Brückner and D. G. Holmes, Optimal pulse-width modulation for three-level inverters, IEEE Trans. Power Electron., vol. 20, no. 1, pp. 82–89, 2005, https://doi: 10.1109/TPEL.2004.839831.
[12]. B. Urmila and D. Subba Rayudu, Optimum space vector PWM algorithm for three-level inverter, J. Eng. Appl. Sci., vol. 6, no. 9, pp. 24–36, 2011.
[13]. S. Choi and M. Saeedifard, Capacitor voltage balancing of flying capacitor multilevel converters by space vector PWM, IEEE Trans. Power Deliv., vol. 27, no. 3, pp. 1154–1161, 2012, https://doi: 10.1109/TPWRD.2012.2191802.
[14]. A. K. Gupta and A. M. Khambadkone, A space vector modulation scheme to reduce common mode voltage for cascaded multilevel inverters, IEEE Trans. Power Electron., vol. 22, no. 5, pp. 1672–1681, 2007, https://doi: 10.1109/TPEL.2007.904195.
[15]. F. Wang, Motor shaft voltages and bearing currents and their reduction in multilevel medium-voltage PWM voltage-source-inverter drive applications, IEEE Trans. Ind. Appl., vol. 36, no. 5, pp. 1336–1341, 2000, https://doi: 10.1109/28.871282.
[16]. C. M. Van, T. N. Xuan, P. V. Hoang, M. T. Trong, S. P. Cong, and L. N. Van, A Generalized space vector modulation for cascaded h-bridge multi-level inverter, in Proceedings of 2019 International Conference on System Science and Engineering, ICSSE 2019, Sep. 2019, pp. 18–24, https://doi: 10.1109/ICSSE.2019.8823465.
[17]. S. Wei, B. Wu, F. Li, and C. Liu, A general space vector PWM control algorithm for multilevel inverters, Conf. Proc. - IEEE Appl. Power Electron. Conf. Expo. - APEC, vol. 1, no. 1, pp. 562–568, 2003, https://doi: 10.1109/apec.2003.1179268.
[18]. Y. Deng, K. H. Teo, C. Duan, T. G. Habetler, and R. G. Harley, A fast and generalized space vector modulation scheme for multilevel inverters, IEEE Transactions on Power Electronics, vol. 29, no. 10. pp. 5204–5217, 2014, https://doi: 10.1109/TPEL.2013.2293734.
[19]. A. K. Gupta and A. M. Khambadkone, A space vector PWM scheme for multilevel inverters based on two-level space vector PWM, IEEE Trans. Ind. Electron., vol. 53, no. 5, pp. 1631–1639, 2006, https://doi: 10.1109/TIE.2006.881989.
[20]. F. Chen and W. Qiao, A general space vector PWM scheme for multilevel inverters, ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings. 2016, https://doi: 10.1109/ECCE.2016.7854687.
[21]. P. Correa and J. Rodriguez, Control strategy reconfiguration for a multilevel inverter operating with bypassed cells, IEEE International Symposium on Industrial Electronics. pp. 3162–3167, 2007, https://doi: 10.1109/ISIE.2007.4375121.
[22]. J. Rodríguez et al., Operation of a medium-voltage drive under faulty conditions, IEEE Transactions on Industrial Electronics, vol. 52, no. 4. pp. 1080–1085, 2005.
[23]. M. Aleenejad, H. Mahmoudi, and R. Ahmadi, Unbalanced space vector modulation with fundamental phase shift compensation for faulty multilevel converters, IEEE Transactions on Power Electronics, vol. 31, no. 10. pp. 7224–7233, 2016, https://doi: 10.1109/TPEL.2015.2509446.
[24]. S. Wei, B. Wu, F. Li, and X. Sun, Control method for cascaded H-bridge multilevel inverter with faulty power cells, Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, vol. 1. pp. 261–267, 2003, https://doi: 10.1109/apec.2003.1179224.