- For Authors
- For Reviewers
Rejoice Thomas Paul, Adi Shankara Institue Of Engineering And Technology, Kalady
|Dynamic Voltage Balance (DVB), Modular Multilevel Converter (MMC), Phase disposition Pulse Width Modulation (PDPWM), Photovoltaic (PV), Selective Virtual Loop Mapping (SVLM)|
This modulation method is based on selective virtual loop mapping, to achieve dynamic capacitor voltage balance without the help of an extra compensation signal. The concept of virtual sub module (VSM) is first established, and by changing the loop mapping relationships between the VSMs and the real submodules, the voltages of the upper/lower arm’s capacitors can be well balanced. This method does not requiring sorting voltages from highest to lowest, and just identify the MIN and MAX capacitor voltage’s index which makes it suitable for a modular multilevel converter with a large number of submodules in one arm. Compared to carrier phase-shifted PWM (CPSPWM), this method is more easily to be realized in field-programmable gate array and is conducive to the control of circulating current. Its feasibility and validity have been verified by simulations.
 M. Guan and Z. Xu, “Modeling and control of a modular multilevel converter-based HVDC system under unbalanced grid conditions,” IEEE Trans. Power Electron., vol. 27, no. 12, pp. 4858– 4867, Dec. 2012.  Jasekar and R. Gupta, “Solar photovoltaic power conversion using modular multilevel converter,” in Proc. Student Conf. Eng. Sy st., 2012, pp. 1–6.  H.Akagi, “Classific ation, terminology, and application of the modular multilevel cascade converter (MMCC),” IEEE Trans. Power Electron.,vol. 2 6, no. 11, pp. 3119– 130,Nov.2011.  G. P. Adam, S. Fi nney, and B. Williams, “Analysis of modular multilevel converter capacitor voltage balancing based on phase voltage redundant states,” IET Power Electron. J., vol. 5, no. 6, pp. 726– 738, 2012.  S. Rohner, S. Bernet, M. Hiller, and R. Sommer, “Modulation, loses and semiconductor requirements of modular multilevel converters,” IEEE Trans. Ind Electron., vol. 57, no. 8, pp. 2633–2642, Aug. 2010.  E. K. Amankwah, J. C. Clare, P. W. Wheeler, and A. J. Watson, “Multi carrier PWM of the modular multilevel VSC for medium voltage applications,” in Proc. IEEE Appl. Power Electron. Conf. Expo., 2012, pp. 2398–2406.  S. Sedghi, A. Dastfan, and A. Ahmadyfard, “A new multilevel carrier based pulse width modulation method for modular multilevel inverter,” in Proc. IEEE Conf. Power Electron. ECCE Asia, Jeju, Korea, 2011, pp. 1432–1439.  E. K. Amankwah, J. Clare, P. W. Wheeler, and A. J. Watson, “Multi carrier PWM of the modular multilevel VSC for medium voltage applications,” in Proc. IEEE Appl. Power Electron. Conf. Expo., 2012, pp. 2398–2406.  I. Abdalla, J. Corda, and L. Zhang,“Multilevel DC-link inverter and control algorithm to overcome the PV partial shading,” IEEE Trans. Power Electron., vol. 28, no. 1, pp. 14–18, Jan. 2013.  M. Hagiwara, R. Maeda, and H. Akagi “Control and analysis of the modular multilevel cascade converter based on double-star chopper-cells (MMCC-DSCC),” IEEE Trans. Power Electron., vol. 26, no. 6, pp. 1649–1658, Jun. 2011.  M. Hagiwara and H. Akagi, “Control and experiment of pulse width modulated modular multilevel converters,” IEEE Trans.Power Electron., vol. 24, no. 7, pp. 1737–1746, Jul. 2009.  H. A latrash, R. A. Amarin, and C. Lam, “Enabling large-scale PV integration into the grid,” in Proc. IEEE Green Technol. Conf., 2012, pp. 1–6.  Z. Li, P. Wang, H. Zhu, Z. Chu, and Y.Li, “An improved pulse width modulation method for chopper-cell-based modular multilevel converters,” IEEE Trans. Power Electron., vol. 27, no. 8, pp. 3472–3481, Aug.2012.  H. P.Mohammadi and M. T. H. Bina, “A transformer less medium-voltage STATCOM topology based on extended Modular multilevel converters,” IEEE Trans. Power Electron., vol. 26, no. 5, pp. 1534–1545, May 2011.  B. Alajmi, K. H. Ahmed, G. P. Adam, J. Finney, and B. W.Williams, “Modular multilevel inverter with maximum power point tracking for grid connected photovoltaic application,” in Proc. IEEE Int.Symp. Ind. Electron. 2011, pp. 2057–2062.  M. Hagiwara and H. Akagi, “Control and experiment of pulse width modulated modular multilevel converters,” IEEE Trans. Power Electron.  Q. Tu, Z. Xu, and L. Xu, “Reduced switching-frequency modulation and circulating current suppression for modular multilevel converters,” IEEE Trans. Power Del., vol. 26, no. 3, pp. 2009–2017, Jul. 2011.  Y. Xue, K. C. Divya, G. Griepentrog,M. Liviu, S. Suresh, and M. Manjrekar, “Towards next generation photovoltaic inverters,” in Proc. IEEE Energy Convers.Congr. Expo. 2011, pp. 2467–2474.  R. K. Varma, V. Khadkikar, and R.Seethapathy, “Nighttime application of PV solar farm as STATCOM to regulate grid voltage,” IEEE Trans. Energy Convers., vol. 24, no. 4, pp. 983–985, Dec. 2009.  L. Liu, H. Li, Z. Wu, and Y. Zhou, “A cascaded photovoltaic system integrating segmented energy storages with self-regulating power allocation control and wide range reactive power compensation,”IEEE Trans. Power Electron., vol. 26,no. 12, pp. 3545–3559, Dec. 2011.
Paper ID: GRDCF004006|
Published in: Conference : National Conference on Emerging Research Trend in Electrical and Electronics Engineering
Page(s): 33 - 44