Abstract
The applications of Multilevel Converter (MLC) are increased because of the huge demand for clean power; especially these types of converters are compatible with the renewable energy sources. In addition, these new types of converters have the capability of high voltage and high power operation. A Nine-level converter in three modes of implementation; Diode Clamped-MLC (DC-MLC), Capacitor Clamped-MLC (CC-MLC), and the Modular Structured-MLC (MS-MLC) are analyzed and simulated in this paper. Various types of Multicarrier Modulation Techniques (MMTs) (Level shifted (LS), and Phase shifted (PS)) are used for operating the proposed Nine level - MLCs. Matlab/Simulink environment is used for the simulation, extracting, and analysis the results. Finally, a comparison is made between the results for all topologies that are implemented regarding to the criteria of the output voltage waveforms harmonic distortion factor, No. of the necessitated power components, and the complexity of each circuit. Based on simulation results, the MS-MLC is finer as compared to the other types of MLCs. It also observed that the MLCs (with three types) using Phase Opposition Disposition (POD) technique is performed better in terms of getting greater fundamental output voltage and lower THD% as compared to the other techniques.
Highlights
The necessity to work switching power converters in huge power usage has forced the advancement of multilevel conversion arrangements
This paper focuses on all types of topology for Multilevel Converter (MLC), unlike the researchers of Venka, et al, 2014, Dubey, et al, 2016 whereas the researchers focus on MS-MLCs, while authors Rane, et al, 2014 simulate only DCMLC topology, and in Thielemans, et al, 2009, the researcher focuses on CC-MLC
SIMULATION RESULTS The output voltage and its Harmonic Spectrum (HS) with various Multicarrier Modulation Techniques (MMTs) of nine-MLC are shown in the Figures below as following : Fig.7 shows the results of Diode ClampedMLC (DC-MLC), Fig. 8 shows the results of CC-MLC, and Fig. 9 shows the results of MS-MLC
Summary
The necessity to work switching power converters in huge power usage has forced the advancement of multilevel conversion arrangements. This is acutely for the reason that ability of MLCs to operate at high voltages and to synthesize as waveforms of excellent spectral quality. Our work involves an analysis and simulation of nine-level MLC (in three types of topology) with all types of MMTs. A complete comparison between them regarding to the criteria of output voltage quality (fundamental peak voltage, Total Harmonic Distortion (THDV) of the output voltage) has been done.
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