Application of the Optimal Minimization of the Total Harmonic Distortion technique to the Multilevel Symmetrical Inverters and Study of its Performance in Comparison with the Selective Harmonic Elimination technique

Many interesting modulation strategies reported in literature are suitable to control multilevel power converters which presents several advantages over the conventional two-level counterpart. Since each of themes have its proper advantages and disadvantages, these strategies can be chosen according to certain performance aspects, which are required or desirable. The general performance specifications are: reducing harmonic distortion, reducing power losses and speeding transient response. In which, the Harmonic Elimination method and the Optimal Minimization technique are very important for reducing the harmonic distortion. In order to know which what control techniques the harmonic performance can be greatly enhanced or substantially improved, a detailed comparison between these two latest techniques with interpretation of its simulation results is the focus of this work.

[1]  Thomas A. Lipo,et al.  Multilevel Power Conversion - An Overview Of Topologies And Modulation Strategies , 1998, Proceedings of the 6th International Conference on Optimization of Electrical and Electronic Equipments.

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

[3]  D. J. Adams,et al.  A power line conditioner using cascade multilevel inverters for distribution systems , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[4]  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.

[5]  Francky Hembert.  Etude et réalisation d'un filtre actif monophasé à structure multiniveaux obtenue par mise en série de ponts à quatre interrupteurs , 1996 .

[6]  Fang Zheng Peng,et al.  Dynamic performance and control of a static VAr generator using cascade multilevel inverters , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[7]  M. K. Fellah,et al.  Selective harmonic eliminated pulse-width modulation technique (SHE PWM) applied to three-level inverter/converter , 2003, 2003 IEEE International Symposium on Industrial Electronics ( Cat. No.03TH8692).

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