Selective harmonic elimination (SHE) is an efficient method to eliminate low-order selected harmonics. However, due to nonlinearity in the problems, many optimization techniques give unsatisfied performances in finding optimum switching angles for the SHE. This paper proposes a modified moth-flame optimization algorithm to eliminate selective harmonics in cascaded multilevel inverters. The optimization algorithm is employed to find sets of optimum switching angles for cascaded 5-level, 7-level, and 9-level inverters. The results have shown that modified moth-flame optimization is beneficial in finding optimum switching angles. It performs better than moth-flame optimization (MFO) and differential evolution (DE) algorithms. The optimum switching angles are applied to generate switching pulses for a cascaded 9-level inverter to demonstrate the algorithm’s accuracy. As a result, the low-order harmonics are entirely removed from the ac output voltage of the inverter.
Abstract– The potency of palm oil mills (PKS) biomass in Kabupaten Landak have been evaluated as alternative for electrical energy in that area. The results have shown that solid biomass (empty fruit bunchs and shells) produced by those of PKS in 2016 have significant potency for generating electrical power. By using steam turbine technology, the biomass potency equal to 2 units of 13 MW power plant. Keywords–Biomass, empty fruit bunch, shell, alternative energy, Landak
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