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Harmonic elimination of cascade multilevel inverters with non-equal DC sources using particle swarm optimization
journal contribution
posted on 2017-08-18, 14:23 authored by Hassan Taghizadeh Esfanjani, Mehrdad Tarafdar HaghIn this paper, the elimination of harmonics in a
cascade multilevel inverter by considering the nonequality of
separated dc sources by using particle swarm optimization is
presented. Solving a nonlinear transcendental equation set
describing the harmonic-elimination problem with nonequal dc
sources reaches the limitation of contemporary computer algebra
software tools using the resultant method. The proposed approach
in this paper can be applied to solve the problem in a simpler manner,
even when the number of switching angles is increased and the
determination of these angles using the resultant theory approach
is not possible. Theoretical results are verified by experiments and
simulations for an 11-level H-bridge inverter. Results show that
the proposed method does effectively eliminate a great number of
specific harmonics, and the output voltage is resulted in low total
harmonic distortion.
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