Analytical Closed-Form Expressions for Harmonic Distortion Corresponding to Novel Switching Sequences for Neutral-Point-Clamped Inverters

Analytical closed-form expressions for harmonic distortion factors corresponding to various pulsewidth modulation (PWM) techniques for a two-level inverter have been reported in the literature. This paper derives such analytical closed-form expressions, pertaining to centered space-vector PWM (CSVPWM) and eight different advanced bus-clamping PWM (ABCPWM) schemes, for a three-level neutral-point-clamped (NPC) inverter. These ABCPWM schemes switch each phase at twice the nominal switching frequency in certain intervals of the line cycle while clamping each phase to one of the dc terminals over certain other intervals. The harmonic spectra of the output voltages, corresponding to the eight ABCPWM schemes, are studied and compared experimentally with that of CSVPWM over the entire modulation range. The measured values of weighted total harmonic distortion (WTHD) of the line voltage VWTHD are used to validate the analytical closed-form expressions derived. The analytical expressions, pertaining to two of the ABCPWM methods, are also validated by measuring the total harmonic distortion (THD) in the line current ITHD on a 2.2-kW constant volts-per-hertz induction motor drive.

[1]  G. Narayanan,et al.  Experimental Investigation on the Effect of Advanced Bus-Clamping Pulsewidth Modulation on Motor Acoustic Noise , 2013, IEEE Transactions on Industrial Electronics.

[2]  S. Fukuda,et al.  Using harmonic distortion determining factor for harmonic evaluation of carrier-based PWM methods , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

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

[4]  D. Boroyevich,et al.  A Carrier-Based PWM Strategy With Zero-Sequence Voltage Injection for a Three-Level Neutral-Point-Clamped Converter , 2012, IEEE Transactions on Power Electronics.

[5]  Pramod Agarwal,et al.  Carrier-Based Neutral Point Potential Regulator With Reduced Switching Losses for Three-Level Diode-Clamped Inverter , 2014, IEEE Transactions on Industrial Electronics.

[6]  Yoshitaka Iwaji,et al.  Introduction of the Harmonic Distortion Determining Factor and Its Application to Evaluating Real Time PWM Inverters , 1995, IEEE Transactions on Industry Applications.

[7]  G. Narayanan,et al.  Novel Switching Sequences for a Space-Vector-Modulated Three-Level Inverter , 2012, IEEE Transactions on Industrial Electronics.

[8]  G. I. Orfanoudakis,et al.  Hybrid Modulation Strategies for Eliminating Low-Frequency Neutral-Point Voltage Oscillations in the Neutral-Point-Clamped Converter , 2013, IEEE Transactions on Power Electronics.

[9]  P. Wheeler,et al.  Space-Vector-Modulated Three-Level Inverters With a Single Z-Source Network , 2013, IEEE Transactions on Power Electronics.

[10]  G. Narayanan,et al.  Space Vector Methods for AC Drives to Achieve High Efficiency and Superior Waveform Quality , 2004 .

[11]  G. Narayanan,et al.  Space-Vector-Based Hybrid Pulsewidth Modulation Techniques for a Three-Level Inverter , 2014, IEEE Transactions on Power Electronics.

[12]  G. Narayanan,et al.  Harmonic Analysis of Advanced Bus-Clamping PWM Techniques , 2009, IEEE Transactions on Power Electronics.

[13]  Ilhami Colak,et al.  A modified harmonic mitigation analysis using Third Harmonic Injection PWM in a multilevel inverter control , 2010, Proceedings of 14th International Power Electronics and Motion Control Conference EPE-PEMC 2010.

[14]  D. G. Holmes,et al.  Optimal pulse-width modulation for three-level inverters , 2005, IEEE Transactions on Power Electronics.

[15]  Obrad Dordevic,et al.  A Comparison of Carrier-Based and Space Vector PWM Techniques for Three-Level Five-Phase Voltage Source Inverters , 2013, IEEE Transactions on Industrial Informatics.

[16]  Antonio Martins,et al.  Multicarrier and space vector modulation for three-phase NPC converters: A comparative analysis , 2009, 2009 13th European Conference on Power Electronics and Applications.

[17]  Frede Blaabjerg,et al.  Modulation Methods for Neutral-Point-Clamped Wind Power Converter Achieving Loss and Thermal Redistribution Under Low-Voltage Ride-Through , 2014, IEEE Transactions on Industrial Electronics.

[18]  Brendan Peter McGrath,et al.  Multicarrier PWM strategies for multilevel inverters , 2002, IEEE Trans. Ind. Electron..

[19]  Jie Chen,et al.  Multilevel SVPWM With DC-Link Capacitor Voltage Balancing Control for Diode-Clamped Multilevel Converter Based STATCOM , 2013, IEEE Transactions on Industrial Electronics.

[20]  Zhe Zhang,et al.  Discontinuous PWM Modulation Strategy With Circuit-Level Decoupling Concept of Three-Level Neutral-Point-Clamped (NPC) Inverter , 2013, IEEE Transactions on Industrial Electronics.

[21]  A. Schonung,et al.  Static Frequency Changers with "Subharmonic" Control in Conjunction with Reversible Variable-Speed A.C.Drives , 1964 .

[22]  John T. Boys,et al.  Harmonic analysis of space vector modulated PWM waveforms , 1990 .

[23]  G. Narayanan,et al.  Reduction of Torque Ripple in Induction Motor Drives Using an Advanced Hybrid PWM Technique , 2010, IEEE Transactions on Industrial Electronics.

[24]  Ahmet M. Hava,et al.  Simple Analytical and Graphical Methods for Carrier-Based PWM-VSI Drives , 1999 .

[25]  Drazen Dujic,et al.  Switching Ripple Characteristics of Space Vector PWM Schemes for Five-Phase Two-Level Voltage Source Inverters—Part 1: Flux Harmonic Distortion Factors , 2011, IEEE Transactions on Industrial Electronics.

[26]  Abdul Rahiman Beig,et al.  Synchronized SVPWM Algorithm for the Overmodulation Region of a Low Switching Frequency Medium-Voltage Three-Level VSI , 2012, IEEE Transactions on Industrial Electronics.

[27]  S. Fukuda,et al.  Harmonic evaluation of carrier-based PWM methods using harmonic distortion determining factor , 1997, Proceedings of Power Conversion Conference - PCC '97.

[28]  S. Halasz,et al.  Two-phase modulation technique for three-level inverter fed AC drives , 1998, MELECON '98. 9th Mediterranean Electrotechnical Conference. Proceedings (Cat. No.98CH36056).

[29]  Leopoldo García Franquelo,et al.  Conventional Space-Vector Modulation Techniques Versus the Single-Phase Modulator for Multilevel Converters , 2010, IEEE Transactions on Industrial Electronics.

[30]  S. Halász Analysis of discontinuous PWM strategies of three-level inverters (I) , 2005, 2005 IEEE International Conference on Industrial Technology.

[31]  Francisco A. S. Neves,et al.  Eliminating Leakage Currents in Neutral Point Clamped Inverters for Photovoltaic Systems , 2012, IEEE Transactions on Industrial Electronics.

[32]  Rajapandian Ayyanar,et al.  Space-Vector-Based Hybrid Pulsewidth Modulation Techniques for Reduced Harmonic Distortion and Switching Loss , 2010, IEEE Transactions on Power Electronics.

[33]  Joachim Holtz,et al.  High-Speed Drive System with Ultrasonic MOSFET PWM Inverter and Single-Chip Microprocessor Control , 1987, IEEE Transactions on Industry Applications.

[34]  Yoshitaka Iwaji,et al.  Harmonic evaluation of an NPC PWM inverter employing the harmonic distortion determining factor , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[35]  S. Halasz Analysis of Discontinuous PWM Strategies of Three-Level Inverters (II) , 2005, 2005 International Conference on Power Electronics and Drives Systems.

[36]  Brendan Peter McGrath,et al.  An analytical technique for the determination of spectral components of multilevel carrier-based PWM methods , 2002, IEEE Trans. Ind. Electron..

[37]  V. Ranganathan,et al.  Analytical evaluation of harmonic distortion in PWM AC drives using the notion of stator flux ripple , 2005, IEEE Transactions on Power Electronics.

[38]  Changliang Xia,et al.  Adjustable Proportional Hybrid SVPWM Strategy for Neutral-Point-Clamped Three-Level Inverters , 2013, IEEE Transactions on Industrial Electronics.

[39]  H. van der Broeck,et al.  Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vectors , 1986, 1986 Annual Meeting Industry Applications Society.