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Keywords
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THD minimization of line voltage, multilevel inverter, cuckoo
optimization algorithm, imperialist competition algorithm, neural
networks
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Abstract
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MTHD of output line voltage waveform in multilevel inverters is discussed in
this paper. With MTHD the DC link values are set to predefined values and also the
optimum switching angles are found, in order to reduce voltage THD and
simultaneously generate the aimed fundamental component. In this study a method
is given to find the optimum solutions using COA associated with ANNs trained with
ICA. The nearest solutions provided by COA obtain a smooth data set that is desired
for the ANNs training. In this study minimization of THD for constant and alterable
DC sources is presented. To present the validity of the proposed approach,
simulation and experimental results are provided for a test case 7-level multilevel
inverter.
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