Harmonic elimination technique for a single-phase multilevel converter with unequal DC link voltage levels
- Authors:
-
- Ghasemi, N. ;
- Zare, F. ;
- Boora, A.A. ;
- Ghosh, A. ;
- Langton, C. ;
-
Blaabjerg, Frede
Close
0000-0001-8311-7412
Power Electronic Systems, Department of Energy Technology, The Faculty of Engineering and Science, Aalborg University
- DOI:
- 10.1049/iet-pel.2011.0457
- Abstract:
- Multilevel converters, because of the benefits they attract in generating high quality output voltage, are used in several applications. Various modulation and control techniques are introduced by several researchers to control the output voltage of the multilevel converters like space vector modulation and harmonic elimination (HE) methods. Multilevel converters may have a DC link with equal or unequal DC voltages. In this study a new HE technique based on the HE method is proposed for multilevel converters with unequal DC link voltage. The DC link voltage levels are considered as additional variables for the HE method and the voltage levels are defined based on the HE results. Increasing the number of voltage levels can reduce lower order harmonic content because of the fact that more variables are created. In comparison to previous methods, this new technique has a positive effect on the output voltage quality by reducing its total harmonic distortion, which must take into consideration for some applications such as uninterruptable power supply, motor drive systems and piezoelectric transducer excitation. In order to verify the proposed modulation technique, MATLAB simulations and experimental tests are carried out for a single-phase four-level diode-clamped converter.
- Type:
- Journal article
- Language:
- English
- Published in:
- Iet Power Electronics, 2012, Vol 5, Issue 8
- Main Research Area:
- Science/technology
- Publication Status:
- Published
- Review type:
- Peer Review
- Submission year:
- 2012
- Scientific Level:
- Scientific
- ID:
- 232306964
