Charge Balance Control Methods for a Class of Fundamental Frequency Modulated Asymmetric Cascaded Multilevel Inverters

Modulation strategies for multilevel inverters have typically focused on synthesizing a desired set of sinusoidal voltage waveforms using a fixed number of dc voltage sources. This makes the average power drawn from different dc voltage sources unequal and time varying. Therefore, the dc voltage sources are unregulated and require that corrective control action be incorporated. In this paper, first two new selections are proposed for determining the dc voltage sources values for asymmetric cascaded multilevel inverters. Then two modulation strategies are proposed for the dc power balancing of these types of multilevel inverters. Using the charge balance control methods, the power drawn from all of the dc sources are balanced except for the dc source used in the first H-bridge. The proposed control methods are validated by simulation and experimental results on a single-phase 21-level inverter.

[1]  S. Busquets-Monge,et al.  Pulsewidth Modulations for the Comprehensive Capacitor Voltage Balance of $n$-Level Three-Leg Diode-Clamped Converters , 2009, IEEE Transactions on Power Electronics.

[2]  Young Min Park,et al.  Design of a Cascaded H-Bridge Multilevel Inverter Based on Power Electronics Building Blocks and Control for High Performance , 2010 .

[3]  Thierry Meynard,et al.  Multi-Level Choppers for High Voltage Applications , 1992 .

[4]  K. Gopakumar,et al.  Asymmetric Multilevel Converter for High Resolution Voltage Phasor Generation , 1999 .

[5]  Arindam Ghosh,et al.  Flying-Capacitor-Based Chopper Circuit for DC Capacitor Voltage Balancing in Diode-Clamped Multilevel Inverter , 2010, IEEE Transactions on Industrial Electronics.

[6]  E. Babaei,et al.  A novel structure for multilevel converters , 2005, 2005 International Conference on Electrical Machines and Systems.

[7]  Ebrahim Afjei,et al.  Novel Method of ACO and Its Application to Rotor Position Estimation in a SRM under Normal and Fault , 2011 .

[8]  D.G. Holmes,et al.  Natural Capacitor Voltage Balancing for a Flying Capacitor Converter Induction Motor Drive , 2009, IEEE Transactions on Power Electronics.

[9]  E. Babaei,et al.  A Cascade Multilevel Converter Topology With Reduced Number of Switches , 2008, IEEE Transactions on Power Electronics.

[10]  Leon M. Tolbert,et al.  Charge balance control schemes for cascade multilevel converter in hybrid electric vehicles , 2002, IEEE Trans. Ind. Electron..

[11]  Ebrahim Babaei,et al.  Reduction of dc voltage sources and switches in asymmetrical multilevel converters using a novel topology , 2007 .

[12]  E. Babaei,et al.  Charge balance control methods for asymmetrical cascade multilevel converters , 2007, 2007 International Conference on Electrical Machines and Systems (ICEMS).

[13]  Ebrahim Babaei,et al.  Asymmetric cascaded multilevel inverter with charge balance control of a low resolution symmetric subsystem , 2010 .

[14]  Dong-Choon Lee,et al.  Control Mode Switching of Induction Machine Drives between Vector Control and V/ f Control in Overmodulation Range , 2011 .

[15]  T. Ishida,et al.  A control strategy for a five-level double converter with adjustable DC link voltage , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[16]  S. Busquets-Monge,et al.  Pulsewidth Modulations for the Comprehensive Capacitor Voltage Balance of $n$-Level Two-Leg Diode-Clamped Converters , 2009, IEEE Transactions on Power Electronics.

[17]  J. M. Leuthen,et al.  Voltage balancing control of diode-clamped multilevel rectifier/inverter systems , 2005, IEEE Transactions on Industry Applications.

[18]  E. Babaei.  OPTIMAL TOPOLOGIES FOR CASCADED SUB-MULTILEVEL CONVERTERS , 2010 .

[19]  J.R. Wells,et al.  Modulation-Based Harmonic Elimination , 2007, IEEE Transactions on Power Electronics.

[20]  Norihisa Komoda,et al.  A Petri Net-Based Controller for Flexible and Maintainable Sequence Control and its Applications in Factory Automation , 1986, IEEE Transactions on Industrial Electronics.

[21]  Giri Venkataramanan,et al.  Reciprocity-transposition-based sinusoidal pulsewidth modulation for diode-clamped multilevel converters , 2002, IEEE Trans. Ind. Electron..

[22]  F.Z. Peng,et al.  Harmonics optimization of the voltage balancing control for multilevel converter/inverter systems , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[23]  Ebrahim Babaei,et al.  New cascaded multilevel inverter topology with minimum number of switches , 2009 .

[24]  S. Pirog,et al.  Results of Investigation of Multicell Converters With Balancing Circuit—Part II , 2009, IEEE Transactions on Industrial Electronics.

[25]  Zhong Du,et al.  Elimination of harmonics in a multilevel converter with nonequal DC sources , 2005, IEEE Transactions on Industry Applications.

[26]  G. Venkataramanan,et al.  DC bus ripple minimization in cascaded H-bridge multilevel converters under staircase modulation , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[27]  Rainer Marquardt,et al.  A new AC/AC multilevel converter family , 2005, IEEE Transactions on Industrial Electronics.

[28]  Fang Zheng Peng,et al.  A multilevel voltage-source inverter with separate DC sources for static VAr generation , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[29]  Thomas A. Lipo,et al.  A hybrid multilevel inverter topology for drive applications , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[30]  Zhiguo Pan,et al.  Voltage balancing control of diode-clamped multilevel rectifier/inverter systems , 2003 .

[31]  Mariusz Malinowski,et al.  A Survey on Cascaded Multilevel Inverters , 2010, IEEE Transactions on Industrial Electronics.

[32]  Hirofumi Akagi,et al.  A New Neutral-Point-Clamped PWM Inverter , 1981, IEEE Transactions on Industry Applications.