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The high power density converter (HPDC) in more electric aircraft gains more and more attention. However, HPDC is one of the main harmonics and electromagnetic influence (EMI) sources in aircraft network. To improve power density of HPDC, different levels with power converter includes 2-level, 3-level, and 5-level configurations will be investigated. Besides, two 3-phase power grids such as 3-phase...
This paper presents the benefits of interleaving three phase voltage source converters (VSCs) to improve the power density. The output harmonics are also analyzed in frequency domain, then design and optimization of coupled inductor and output filter are given. Verifications are carried out through electrical circiut and electromagnetic's FEM simualtions. Finally, the inductor weight are compared...
Multi-megawatt photovoltaic (PV) power plants are widespread in electrical power systems because of the drastic decrease in the PV panel prices. The multi-string structure is considered for high power PV systems due to the increase in the overall energy conversion efficiency and the modularity when compared to the centralized topology. High power conversion can be achieved easily using parallel connection...
Multi-megawatt photovoltaic (PV) power plants are widespread in electrical power systems because of the drastic decrease in the PV panel prices. The multi-string structure is considered for high power PV systems due to the increase in the overall energy conversion efficiency and the modularity when compared to the centralized topology. High power conversion can be achieved easily using parallel connection...
This paper proposes a simple modulation technique and a hybrid carrier-based PWM named as phase-shifted carrier phase-disposition PWM (PSC-PD-PWM) to reduce the switching states and the overall switching frequency of the state-of-art multiceli inverter. By doing so, higher number of output phase voltage levels can be synthesized with the number of flying capacitors and power semiconductor switches...
This paper proposes a new unidirectional three-phase five-level rectifier topology that requires only a minimum of six IGBT devices. The concept of this rectifier topology with reduced number of operating devices is derived from the basic structure of a bidirectional multiple-pole multilevel diode-clamped rectifier. Hence, this proposed rectifier is named as Multiple-pole VIENNA Rectifier (MVR) topology...
Multilevel converters in FACTS and distributed generation system are very promising area for academic researchers and industry interest. Here two different modulation schemes of 3-level Neutral point clamped inverter are proposed and presented. The inherent neutral point potential unbalance issues and balancing methods for LS-PWM and SVM techniques are analyzed in detail. Total Harmonic Distortion...
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