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Application of differential evolution for cascaded multilevel VSI with harmonics elimination PWM switching

Amjad, Abdul Moeed and Salam, Zainal and Saif, Ahmed Majed Ahmed (2015) Application of differential evolution for cascaded multilevel VSI with harmonics elimination PWM switching. International Journal Of Electrical Power & Energy Systems, 64 . pp. 447-456. ISSN 1420-615

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Official URL: http://dx.doi.org/10.1016/j.ijepes.2014.07.023


Harmonic elimination pulse width modulation (HEPWM) method has been widely applied to multilevel voltage source inverter (MVSI) to remove low frequency harmonics from its output voltage. However, the computation of the HEPWM switching angles for MVSI is very challenging due to several constraints, namely angle sequencing, very tight angular spacing and the numerous possibilities of angles distribution ratio. Realizing the potential of Differential Evolution (DE) to handle complex problems, this work proposes its application to solve the HEPWM problem for cascaded MVSI. Its emphasis is on improving the availability of HEPWM for higher output voltage by extending the maximum range of modulation index (M). It also removes the discontinuities in the switching angles and reduces the number of distribution ratio required to obtain the required solution. Compared to the most advanced (similar) work, i.e., 7-level MVSI with seventeen switching angles, DE covers a wider range of M; the maximum achievable M is 2.80. Furthermore, it exhibits very low second order distortion factor (DF2): for the worst case, the value of DF2 is 0.0014%. To verify the viability of the proposed algorithm, simulation is carried out and hardware prototype is constructed. Both results show very good agreement with the theoretical prediction.

Item Type:Article
Uncontrolled Keywords:differential evolution (DE), harmonics elimination pulse width modulation (HEPWM), minimization method, multilevel voltage source inverter (MVSI)
Subjects:A General Works
ID Code:57858
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:26 Feb 2017 09:52

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