Voltage-sharing converter to supply single-phase asymmetrical four-level diode-clamped inverter with high power factor loads
MetadataShow full item record
The output voltage quality of some of the single-phase multilevel inverters can be improved when their dc-link voltages are regulated asymmetrically. Symmetrical and asymmetrical multilevel diode-clamped inverters have the problem of dc-link capacitor voltage balancing, especially when power factor of the load is close to unity. In this paper, a new single-inductor multi-output dc/dc converter is proposed that can control the dc-link voltages of a single-phase diode-clamped inverter asymmetrically to achievevoltage quality enhancement. The circuit of the presented converter is explained and themain equations are developed. A control strategy is proposed and explained in details. To validate the versatilityof the proposed combination of the suggested dc–dc converter and the asymmetrical four-level diode-clamped inverter (ADCI), simulations and experiments have been directed. It is concluded that theproposed combination of introduced multioutput dc–dc converter and single-phase ADCI is a good candidate for power conversion in residential photovoltaic (PV) utilization.
Showing items related by title, author, creator and subject.
A hybrid cascade converter topology with series-connected symmetrical and asymmetrical diode-clamped H-bridge cellsNami, A.; zare, F.; Ghosh, Arindam; Blaabjerg, F. (2011)A novel H-bridge multilevel pulsewidth modulation converter topology based on a series connection of a high-voltage diode-clamped inverter and a low-voltage conventional inverter is proposed in this paper. A dc link voltage ...
A new unequal DC link voltage configuration for a single phase multilevel converter to reduce low order harmonicsGhasemi, N.; zare, F.; Langton, C.; Ghosh, Arindam (2011)Multilevel converters are used in high power and high voltage applications due to their attractive benefits in generating high quality output voltage. Increasing the number of voltage levels can lead to a reduction in ...
Comparison between symmetrical and asymmetrical single phase multilevel inverter with diode-clamped topologyNami, A.; zare, F.; Ledwich, G.; Ghosh, Arindam; Blaabjerg, F. (2008)In this paper, a different configuration based on different DC bus voltage for a diode-clamped multilevel inverter has been presented. Two different symmetrical and asymmetrical arrangements of a four-level diode clamped ...