A Simplified Synchronous Pulse-Width Modulation Method for Three-level Inverter of High-speed Train

The synchronous Pulse-Width Modulation (PWM) is quite complex for three-level neutral point-clamped (NPC) inverter. A simple central 60° synchronous modulation method is presented in this paper for three-level NPC inverter used in the multi-mode PWM strategy. For the fundamental voltage command, the switching angle could be real-time calculated based on this modulation method with different carrier frequency ratios. The switching strategy between these modes is discussed for multi-mode PWM. According to this method, a simulation model of the drive system with three-level inverter and induction motor is built. The simulation results at asynchronous modulation, central 60° synchronous modulation and square wave area, show that the output voltage values can meet the requirements with a good symmetry even in the case of low carrier frequency ratio. The smooth switching among different modes is also accomplished with low impulse current.

[1]  Joachim Holtz,et al.  Synchronous optimal pulsewidth modulation and stator flux trajectory control for medium voltage drives , 2005 .

[2]  Leopoldo García Franquelo,et al.  Selective Harmonic Mitigation Technique for High-Power Converters , 2010, IEEE Transactions on Industrial Electronics.

[3]  G. Narayanan,et al.  Extension of operation of space vector PWM strategies with low switching frequencies using different overmodulation algorithms , 2002 .

[4]  Derrick Holliday,et al.  Optimal Regular-Sampled PWM Inverter Control Techniques , 2007, IEEE Transactions on Industrial Electronics.

[5]  Joachim Holtz,et al.  Optimal pulsewidth modulation of multilevel inverters for low switching frequency control of medium voltage high power industrial AC drives , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[6]  G. Narayanan,et al.  Modified SVPWM Algorithm for Three Level VSI With Synchronized and Symmetrical Waveforms , 2007, IEEE Transactions on Industrial Electronics.

[7]  Xin Qi,et al.  Optimal Control of Medium-Voltage Drives—An Overview , 2013, IEEE Transactions on Industrial Electronics.

[8]  T. Boller,et al.  Neutral point potential balancing using synchronous optimal pulsewidth modulation of multilevel inverters in medium voltage high power AC drives , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[9]  N. Oikonomou,et al.  Closed-Loop Control of Medium-Voltage Drives Operated With Synchronous Optimal Pulsewidth Modulation , 2008, IEEE Transactions on Industry Applications.

[10]  B. Tech,et al.  Selective Harmonic Elimination by Program- mable Pulse Width Modulation in Inverters , 2013 .

[11]  J. Holtz,et al.  Synchronous Optimal Pulsewidth Modulation and Stator Flux Trajectory Control for Medium-Voltage Drives , 2005, IEEE Transactions on Industry Applications.

[12]  Ye Zongbin.  Comparison of Two-level and Three-level Converters in Permanent Magnet Direct-drive Wind Power Generation System , 2011 .

[13]  Bin Wu,et al.  A Generalized Formulation of Quarter-Wave Symmetry SHE-PWM Problems for Multilevel Inverters , 2009, IEEE Transactions on Power Electronics.

[14]  Akshay Kumar Rathore,et al.  Synchronous Optimal Pulsewidth Modulation for Low-Switching-Frequency Control of Medium-Voltage Multilevel Inverters , 2010, IEEE Transactions on Industrial Electronics.

[15]  Joachim Holtz,et al.  Fast Dynamic Control of Medium Voltage Drives Operating at Very Low Switching Frequency—An Overview , 2008, IEEE Transactions on Industrial Electronics.

[16]  Xiaoli Du,et al.  A Generalized Half-Wave Symmetry SHE-PWM Formulation for Multilevel Voltage Inverters , 2010, IEEE Transactions on Industrial Electronics.

[17]  Ye Manyua,et al.  Study on Walsh Function Based Multi-Band SHEPWM Control Technology for Multi-Level Inverter , 2013 .

[18]  S. Bernet,et al.  A comparison of three-level converters versus two-level converters for low-voltage drives, traction, and utility applications , 2005, IEEE Transactions on Industry Applications.

[19]  Bimal K. Bose,et al.  Modern Power Electronics and AC Drives , 2001 .

[20]  Tobias Geyer,et al.  Model predictive pulse pattern control for the five-level active neutral point clamped inverter , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[21]  J. Holtz,et al.  Neutral-Point Potential Balancing Using Synchronous Optimal Pulsewidth Modulation of Multilevel Inverters in Medium-Voltage High-Power AC Drives , 2012, IEEE Transactions on Industry Applications.

[22]  Thomas A. Lipo,et al.  Pulse Width Modulation for Power Converters: Principles and Practice , 2003 .

[23]  Kevin Lee,et al.  Quantitative power quality and characteristic analysis of multilevel pulse width modulation methods in medium voltage high power industrial drives , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[24]  Frede Blaabjerg,et al.  Selective harmonic control for power converters , 2014, 2014 IEEE Energy Conversion Congress and Exposition (ECCE).

[25]  Jackson Lago,et al.  Multilevel synchronous optimal pulsewidth modulation generalized formulation , 2014, 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL).