Advanced Pulse Width Modulation Techniques for Z Source Multi Level Inverter

Authors: B. M. Manjunatha, D. V. Ashok Kumar, M. Vijay Kumar

Abstract:

This paper proposes five level diode clamped Z source Inverter. The existing PWM techniques used for ZSI are restricted for two level. The two level Z Source Inverter have high harmonic distortions which effects the performance of the grid connected PV system. To improve the performance of the system the number of voltage levels in the output waveform need to be increased. This paper presents comparative analysis of a five level diode clamped Z source Inverter with different carrier based Modified Pulse Width Modulation techniques. The parameters considered for comparison are output voltage, voltage gain, voltage stress across switch and total harmonic distortion when powered by same DC supply. Analytical results are verified using MATLAB.

Keywords: Diode Clamped, Pulse Width Modulation, total harmonic distortion, Z Source Inverter.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1100268

References:

[1] J. H. Park “A Control Strategy for the Grid-connected PV System Using a Z-Source Inverter,” 2nd IEEE International Conference on Power and Energy (PECon 08), December 1-3, 2008, Johor Baharu, Malaysia.
[2] F. Z. Peng, “Z source Inverter,” IEEE Trans. Ind. Appl., vol. 39, pp. 504-510, March/April 2003.
[3] S. Thangaprakash, A. Krishnan, “Comparative evaluation of modified pulse width modulation schemes of Z-source inverter for various applications & demands,” International journal of Engineering, Science and Technology, Vol. 2, No. 1, 2010, pp. 103-115.
[4] K. Janardhana, P. Agarwal “Performance Analysis of Different PWM control for Three-Phase Z-Source Inverter,” UACEE international journal of advancement in Electronics and Electrical engineering vol. 1, No. 1.
[5] P. C. Loh, F. Blaabjerg, and C. P. Wong, "Comparative evaluation of pulse width modulation strategies for Z-source neutral-point-clamped inverter," IEEE Trans. Power Electron., vol. 22, no. 3, pp. 1005-1013,May 2007.
[6] P. C. Loh, F. Gao, F. Blaabjerg, S. Y. Feng, and K. N. Soon, "Pulse Width Modulated Z-source neutral-point-clamped inverter," IEEE Trans. Ind. Appl., vol. 43, no. 5, pp. 1295-1308, Sep./Oct. 2007.
[7] Miaosen Shen and Peng.F.Z, “Operation Modes and Characteristics of the Z-source Inverter with small inductance”, IEEE Trans. Ind. Appl., Vol. 55, No.1, pp. 89-96, Jan., 2008.
[8] P. C. Loh, S. W. Lim, F. Gao, and F. Blaabjerg, "Three-level Z-source Inverters using a single LC impedance network," IEEE Trans. Power Electron., vol. 22, no. 2, pp. 706-711, Mar. 2007.