Voltage balancing control of diode-clamped multilevel rectifier/inverter systems

This paper presents a new voltage balancing control for the diode-clamped multilevel rectifier/inverter system. A complete analysis of the voltage balance theory for a 5-level back-to-back system is given. The analysis is based on fundamental frequency switching control and then extended to pulse-width modulation. The method involves obtaining optimal switching angles; a process which is described in detail in this paper. The proposed control strategy regulates the DC bus voltage, balances the capacitors, and decreases the harmonic components of the voltage and current. Simulation and experimental results demonstrate the validity of the optimizing method and control theory.

[1]  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).

[2]  Mario Marchesoni,et al.  Diode-clamped multilevel converters: a practicable way to balance DC-link voltages , 2002, IEEE Trans. Ind. Electron..

[3]  Keith A. Corzine,et al.  Reduced parts-count multi-level rectifiers , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[4]  Leon M. Tolbert,et al.  Multilevel converters for large electric drives , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[5]  Mark Sumner,et al.  Neutral point control for multi-level inverters: theory, design and operational limitations , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[6]  Thomas A. Lipo,et al.  A four level rectifier-inverter system for drive applications , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[7]  Tokuo Ohnishi,et al.  PWM control method for a four-level inverter , 1995 .

[8]  Fang Zheng Peng,et al.  Multilevel converters-a new breed of power converters , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[9]  Fang Zheng Peng,et al.  A multilevel voltage-source converter system with balanced DC voltages , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[10]  Peter K. Steimer,et al.  Five level GTO inverters for large induction motor drives , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[11]  M. Fracchia,et al.  Optimized modulation techniques for the generalized N-level converter , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

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

[13]  Thomas A. Lipo,et al.  A four level rectifier inverter system for drive applications , 1998 .

[14]  Mark Sumner,et al.  The investigation and development of a multi-level voltage source inverter , 1996 .