Lower Order Harmonics Minimisation in CHB Inverter Using GA and Decomposition by WT

Nowadays Multilevel inverters are widely using in various applications. Modulation strategy at fundamental switching frequency like, SHEPWM is prominent technique to eliminate lower order of harmonics with less switching losses and better harmonic profile. The equations which are formed by SHE are highly nonlinear transcendental in nature, there may exist single, multiple or even no solutions for a particular MI. However, some loads such as electrical drives, it is required to operate in whole range of MI. In order to solve SHE equations for whole range of MI, intelligent techniques are well suited to solve equations so as to produce lest %THDV. Hence, this paper uses Continuous genetic algorithm for minimising harmonics. This paper also presents wavelet based analysis of harmonics. The developed algorithm is simulated and %THD from FFT analysis and Wavelet analysis are compared. MATLAB programming environment and SIMULINK models are used whenever necessary.





References:
[1] Bin Wu "High-power converters and AC Drives," Wiley-IEEE Press
2006.
[2] Mariusz Malinowski, K. Gopa Kumar, Jose Rodriguez and Marcelo
A.Perez, "A Survey on cascaded multilevel inverters", IEEE
Transactions on Industrial Elecronics, vol,57,No. 7,July 2010.
[3] Jose Rodriguez, J.S. Lai and F.Z.Peng, "Multilevel inverters: A survey of
Topologies, Controls and Applications", IEEE Trans.Ind.Electron.,
vol.49, no. 4, pp.724-738, August 2002.
[4] Marcelo A.Perez and Jose Rodriguez, "Predictive control algorithm
technique for multilevel asymmetric cascaded H-Bridge inverters", IEEE
Transactions on Industrial Elecronics, vol,55, No. 12, December,2008.
[5] D.G. Holmes and T.A. Lipo, "Pulse Width Modulation for Power
Converters Principles and Practice," New York: IEEE, 2003.
[6] Jagdish Kumar, Biswarup Das and Pramod Agarwal, "Selective
harmonic elimination technique for a multilevel inverter", Fifteenth
National power Systems Conference (NPSC), IIT Bombay, December
2008.
[7] J.Sun and H.Grotstollen, "Solving Nonlinear equations for Selective
harmonic eliminated PWM using predicted initial values," in
Proc.Int.Conf.Industrial Electronics, Control, Instrumentation,
Automation, 1992, pp. 259-264.
[8] J.Chiasson, L. Tolbert, K. McKenZie, and Z. Du, "Eliminating
harmonics in a multi-level converter using resultant theory of symmetric
polynomials and resultants," IEEE trans. Control Syst. Technol., Vol.13,
No 2, pp. 216-223, Mar. 2005.
[9] K El-Naggar and T. H. Abdelhamid, "Selective harmonic elimination of
new family of multi-level inverters using genetic algorithms," Energy
Conversion and Management, Vol. 49, No. 1, pp.89-95, Jan. 2008.
[10] Samir Kouro, S. La Rocca, B. Cortes, P. Alepuz, S. Bin Wu Rodriguez,
J. "Predictive control based selective harmonic elimination with low
switching frequency for multilevel converters" Energy Conversion
Congress and Exposition, 2009. ECCE 2009. IEEE, pp- 3130 - 3136.
[11] Li Li, Dariusz Czarkowski, Yaguang liu and Pragasen pillay, "Multilevel
selective harmonic elimination PWM technique in series-connected
voltage inverters," IEEE Transactions on Industry Applications, Vol.36,
No. 1, January/February 2000.
[12] J. Wang, Y. Huang, and F. Z. Peng, "A practical harmonics elimination
method for multilevel inverters," in Conf. Rec. IEEE IAS Annu.
Meeting, Oct. 2005, vol. 3, pp. 1665-1670.
[13] L.Davis, The Handbook Of Genetic Algorithms, New York, 1991.
[14] L. Chambers. "Practical handbook of genetic algorithms" Boca Raton,
CRC Press 1995.
[15] S.N.Sivanandam, & S.N.Deepa, "Principles of Soft Computing",
Second edition page(s):385-401,2011.
[16] K.Deb, "Multi-Objecctive Optimisation using Evalutionary
Algorithms"Wiley,2001.
[17] Reza Salehi, Naeem Faroknia, Mehrdad Abedi and Seyed Hamid Fathi,
"Elimination of Low order harmonics in Multilevel inverter using
Genetic Algorithm," Journal of Power Electronics, vol. 11,no. 2,pp.
132-139, Mar 2011.
[18] A.M.Gaoud and M.M.A.Salma et al, "Power Quality Detection and
Classifiction Using Wavelet-Multiresolution Signal Deomposition,"
IEEE Transactions on Power Delivery, Vol.14, No. 4, Oct 1999,
pp.1469-76.
[19] Stephane G.Mallat, "A Theory for Multiresolution Signal
Decomposition: The Wavelet Representations," IEEE Transactions on
Pattern Analysis and Machine intelligence. Vol.11, No. 7, July 1989,
pp.193-202.