An Effortless Space-Vector-Based Modulation for $N$ -level Flying Capacitor Multilevel Inverter With Capacitor Voltage Balancing Capability

Although inverters with high number of levels offer many merits, their utilization is hindered mainly by their complicated control. Overcoming this barrier gives them the opportunity to find more practical applications. This paper presents an effective closed-loop space-vector-based modulation algorithm to control flying capacitor multilevel inverters with linearly distributed flying capacitor voltages. This modulation technique drastically reduces the computational load. Besides, it is able to balance capacitor voltages more simply and effectively than other methods presented so far. It does not require any stored information from memory or a lookup table. Therefore, it permits online computation of the switching sequence. Moreover, due to the closed-loop structure of this method, the effect of system nonlinearity and capacitor voltage deregulation on performance of the modulation is reduced. Other advantages of the proposed algorithm are: low number of instructions, level-independent number of instructions, and simple extendibility to an arbitrary number of levels without considerable modification.

[1]  Marc Hiller,et al.  Modulation, Losses, and Semiconductor Requirements of Modular Multilevel Converters , 2010, IEEE Transactions on Industrial Electronics.

[2]  D. G. Holmes,et al.  Optimized space vector switching sequences for multilevel inverters , 2003 .

[3]  L.G. Franquelo,et al.  The age of multilevel converters arrives , 2008, IEEE Industrial Electronics Magazine.

[4]  Dushan Boroyevich,et al.  A fast space vector modulation algorithm for multilevel three-phase converters , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).

[5]  Dong-Seok Hyun,et al.  A symmetric carrier technique of CRPWM for voltage balance method of flying-capacitor multilevel inverter , 2005, IEEE Transactions on Industrial Electronics.

[6]  Gabor C. Temes,et al.  Understanding Delta-Sigma Data Converters , 2004 .

[7]  Jalal Amini,et al.  Flying capacitor multilevel inverter based shunt active power filter with trifling susceptibility to divisional voltages deregulation , 2011, 2011 10th International Conference on Environment and Electrical Engineering.

[8]  Ashwin M. Khambadkone,et al.  A Space Vector PWM Scheme for Multilevel Inverters Based on Two-Level Space Vector PWM , 2006, IEEE Transactions on Industrial Electronics.

[9]  M. R. Baiju,et al.  A low computation Space Vector PWM scheme for multilevel inverters based on fractal approach , 2010, 2010 IEEE Symposium on Industrial Electronics and Applications (ISIEA).

[10]  M.F. Escalante.  A General Space Vector Modulation Strategy for n-Level Three-Phase Inverters , 2006, 2006 IEEE International Symposium on Industrial Electronics.

[11]  Daniel E. Quevedo,et al.  Model Predictive Control of an Asymmetric Flying Capacitor Converter , 2009, IEEE Transactions on Industrial Electronics.

[12]  Mehdi Ferdowsi,et al.  Active Capacitor Voltage Balancing in Single-Phase Flying-Capacitor Multilevel Power Converters , 2012, IEEE Transactions on Industrial Electronics.

[13]  Maurice Fadel,et al.  A Predictive Control With Flying Capacitor Balancing of a Multicell Active Power Filter , 2008, IEEE Transactions on Industrial Electronics.

[14]  Pascal Maussion,et al.  Multicell converters: active control and observation of flying-capacitor voltages , 2002, IEEE Trans. Ind. Electron..

[15]  T.A. Meynard,et al.  Optimal Modulation of Flying Capacitor and Stacked Multicell Converters using a State Machine Decoder , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[16]  J. Nieznański.  Analytical establishment of the minimum-distortion pulse density modulation , 1997 .

[17]  A. Shukla,et al.  Improved Multilevel Hysteresis Current Regulation and Capacitor Voltage Balancing Schemes for Flying Capacitor Multilevel Inverter , 2008, IEEE Transactions on Power Electronics.

[18]  R. S. Kanchan,et al.  Synchronised carrier-based SVPWM signal generation scheme for the entire modulation range extending up to six-step mode using the sampled amplitudes of reference phase voltages , 2007 .

[19]  Francisco D. Freijedo,et al.  Multilevel Multiphase Space Vector PWM Algorithm , 2008, IEEE Transactions on Industrial Electronics.

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

[21]  H.L. Liu,et al.  Three-level space vector PWM in low index modulation region avoiding narrow pulse problem , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.

[22]  Jun Liang,et al.  Modified Phase-Shifted PWM Control for Flying Capacitor Multilevel Converters , 2007, IEEE Transactions on Power Electronics.

[23]  Dong-Seok Hyun,et al.  Carrier-rotation strategy for voltage balancing in flying capacitor multilevel inverter , 2004 .

[24]  D. G. Holmes,et al.  Enhanced Voltage Balancing of a Flying Capacitor Multilevel Converter Using Phase Disposition (PD) Modulation , 2011, IEEE Transactions on Power Electronics.

[25]  Sanghun Choi,et al.  Capacitor Voltage Balancing of Flying Capacitor Multilevel Converters by Space Vector PWM , 2012, IEEE Transactions on Power Delivery.

[26]  Fang Zheng Peng,et al.  A generalized multilevel inverter topology with self voltage balancing , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[27]  Mario A. Gonzalez,et al.  New voltage balancing strategy for flying capacitor multilevel converters , 2010, 12th IEEE International Power Electronics Congress.