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Multilevel power electronic converters have gained popularity in high-power applications due to their lower switch voltage stress and modularity. Cascaded H-bridge converters are a promising breed of multilevel converters which generally require several separate dc voltage sources. By utilizing the redundant switching states, it is possible to replace the separate dc voltage sources with capacitors...
This paper proposes the application of Differential Evolution (DE) algorithm to the selective harmonics elimination pulse-width modulation (SHE-PWM) scheme. The aim is to solve for the set of transcendental equations that determine the switching angles of the SHE-PWM waveform. The objective function of DE is designed to minimize the selected harmonics to near zero. Furthermore the fundamental component...
A five-level hybrid cascaded inverter operating under selective harmonic elimination (SHE) pulse-width modulation (PWM) control is discussed in this paper. The topology is a cascaded connection of a conventional three-phase, two-level inverter and an H-bridge module for each phase with a single DC-source. The topology boosts the output voltage within limits and with no additional DC-DC converters...
The problem of selective harmonic elimination pulse-width modulation (SHE-PWM) exhibits multiple sets of solutions. While these sets provide different solutions to the same problem, their harmonic performance varies greatly. Typical formulations to the problem have so far considered a quarter-wave symmetrically defined waveform in order to simplify the process of finding the required solutions, with...
In this paper, a new hysteresis voltage control technique based on optimized harmonic elimination method is presented for a single phase multilevel inverter with flying capacitor topology in high voltage high frequency applications such as high voltage plasma systems. A main objective of the proposed technique is to generate high voltage and control capacitors voltages in all operational conditions...
This paper presents the novel particle swarm optimization technique to determine the optimum switching angles of multilevel converters so as to produce the required fundamental voltage while at the same time not generate lower order harmonics. This optimization method is applied to transcendental equations characterizing the harmonic content to minimize low order harmonics. All set of solutions are...
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