RT Journal Article
T1 Elimination of Low-Frequency Ripples and Regulation of Neutral-Point Voltage in Stacked Multicell Converters
A1 Ghias, Amer M.Y.M.
A1 Pou, Josep
A1 Acuna, Pablo
A1 Ceballos, Salvador
A1 Heidari, Alireza
A1 Agelidis, Vassilios G.
A1 Merabet, Adel
AB This paper introduces a modulation method for the stacked multicell converters (SMCs). The proposed method is implemented using phase-disposition pulse width modulation and is capable of balancing and regulating the voltages of all the capacitors in the topology, i.e., the flying capacitors and the dc-link capacitors. The proposed method is also able to eliminate the low-frequency voltage ripples that may appear in the neutral point (NP) of SMCs. In SMCs with two stacks, the NP voltage level can be generated by direct connection of the output to the dc-link NP, but also using two extra states available. This redundancy is used to regulate the NP voltage. Furthermore, since the proposed method can eliminate the low-frequency voltage ripples in the capacitors, the capacitances of all the capacitors of the SMCs can be reduced, while maintaining high quality of the output voltages and currents. This enables the use of film capacitors. Simulation and experimental results are presented from a three-phase five-level 2× 2 SMC to verify the effectiveness of the proposed method.
SN 0885-8993
YR 2017
FD 2017-01
LA eng
NO Ghias , A M Y M , Pou , J , Acuna , P , Ceballos , S , Heidari , A , Agelidis , V G & Merabet , A 2017 , ' Elimination of Low-Frequency Ripples and Regulation of Neutral-Point Voltage in Stacked Multicell Converters ' , IEEE Transactions on Power Electronics , vol. 32 , no. 1 , 7422812 , pp. 164-175 . https://doi.org/10.1109/TPEL.2016.2536646
NO Publisher Copyright: © 2016 IEEE.
DS TECNALIA Publications
RD 3 jul 2024