Circulating current control and evaluation of carrier dispositions in modular multilevel converters

This paper presents two control techniques to minimize the circulating currents of the modular multilevel converter. The control techniques reduce the amplitude of each capacitor voltage ripple. Multicarrier level-shifted pulse-width-modulation is applied and the performance of interleaving and non-interleaving the carrier waveforms between the upper and the lower arms is reported. The total harmonic distortion of the output common voltage and rms value of the arms currents are benchmarked against the case when such techniques are not employed. The techniques have been verified by simulation using MATLAB/Simulink and PLECS Blockset software. Experimental results from a low power phase-leg prototype built with five sub-modules per arm are also provided.

[1]  Hans-Peter Nee,et al.  Inner control of Modular Multilevel Converters - An approach using open-loop estimation of stored energy , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[2]  Jiangchao Qin,et al.  Predictive control of a modular multilevel converter for a back-to-back HVDC system , 2012, 2013 IEEE Power & Energy Society General Meeting.

[3]  Bin Wu,et al.  Recent Advances and Industrial Applications of Multilevel Converters , 2010, IEEE Transactions on Industrial Electronics.

[4]  Fang Zheng Peng,et al.  Multilevel inverters: a survey of topologies, controls, and applications , 2002, IEEE Trans. Ind. Electron..

[5]  Staffan Norrga,et al.  Circulating current control in modular multilevel converters with fundamental switching frequency , 2012, Proceedings of The 7th International Power Electronics and Motion Control Conference.

[6]  Jiangchao Qin,et al.  Predictive Control of a Modular Multilevel Converter for a Back-to-Back HVDC System , 2013, IEEE Transactions on Power Delivery.

[7]  Staffan Norrga,et al.  A New Modulation Method for the Modular Multilevel Converter Allowing Fundamental Switching Frequency , 2011, IEEE Transactions on Power Electronics.

[8]  Vassilios G. Agelidis,et al.  Analysis of multi-carrier PWM methods for back-to-back HVDC systems based on modular multilevel converters , 2011, IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society.

[9]  A. Huang,et al.  Circulating current control of double-star chopper-cell modular multilevel converter for HVDC system , 2012, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society.

[10]  Bin Wu,et al.  Multilevel Voltage-Source-Converter Topologies for Industrial Medium-Voltage Drives , 2007, IEEE Transactions on Industrial Electronics.

[11]  Staffan Norrga,et al.  A New Modulation Method for the Modular Multilevel Converter Allowing Fundamental Switching Frequency , 2012 .

[12]  S. Norrga,et al.  Evaluation of different carrier-based PWM methods for modular multilevel converters for HVDC application , 2012, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society.

[13]  J Pou,et al.  Variable-Frequency Grid-Sequence Detector Based on a Quasi-Ideal Low-Pass Filter Stage and a Phase-Locked Loop , 2010, IEEE Transactions on Power Electronics.

[14]  Kurt Friedrich,et al.  Modern HVDC PLUS application of VSC in Modular Multilevel Converter topology , 2010, 2010 IEEE International Symposium on Industrial Electronics.

[15]  G. Sciutto,et al.  A new multilevel PWM method: a theoretical analysis , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[16]  Vassilios G. Agelidis,et al.  Performance evaluation of half-bridge cascaded multilevel converters operated with multicarrier sinusoidal PWM techniques , 2009, 2009 4th IEEE Conference on Industrial Electronics and Applications.

[17]  Rainer Marquardt,et al.  An innovative modular multilevel converter topology suitable for a wide power range , 2003, 2003 IEEE Bologna Power Tech Conference Proceedings,.

[18]  Rainer Marquardt,et al.  Modular Multilevel Converter topologies with DC-Short circuit current limitation , 2011, 8th International Conference on Power Electronics - ECCE Asia.

[19]  Baoming Ge,et al.  Medium-Voltage Multilevel Converters—State of the Art, Challenges, and Requirements in Industrial Applications , 2010, IEEE Transactions on Industrial Electronics.

[20]  Steven Liu,et al.  Integrated current control, energy control and energy balancing of Modular Multilevel Converters , 2010, IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society.

[21]  B. W. Williams,et al.  Modular multilevel converter for medium-voltage applications , 2011, 2011 IEEE International Electric Machines & Drives Conference (IEMDC).

[22]  Reza Iravani,et al.  Dynamic performance of a modular multilevel back-to-back HVDC system , 2010, 2011 IEEE Power and Energy Society General Meeting.

[23]  Zhao Yan,et al.  A study on MMC model and its current control strategies , 2010, The 2nd International Symposium on Power Electronics for Distributed Generation Systems.

[24]  P. W. Wheeler,et al.  Multi carrier PWM of the modular multilevel VSC for medium voltage applications , 2012, 2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[25]  Makoto Hagiwara,et al.  Theoretical analysis and control of the modular multilevel cascade converter based on double-star chopper-cells (MMCC-DSCC) , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[26]  M. Saeedifard,et al.  Minimization of the capacitor voltage fluctuations of a modular multilevel converter by circulating current control , 2012, IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society.