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Multi-Input Switched-Capacitor Multilevel Inverter for High-Frequency AC Power Distribution.

Authors :
Raman, S. Raghu
Cheng, Ka Wai Eric
Ye, Yuanmao
Source :
IEEE Transactions on Power Electronics; Jul2018, Vol. 33 Issue 7, p5937-5948, 12p
Publication Year :
2018

Abstract

This paper proposes a switched-capacitor multilevel inverter for high-frequency ac power distribution systems. The proposed topology produces a staircase waveform with higher number of output levels employing fewer components compared to several existing switched-capacitor multilevel inverters in the literature. This topology is beneficial where asymmetric dc voltage sources are available, e.g., in case of renewable energy farms based ac microgrids and modern electric vehicles. Utilizing the available dc sources as inputs for a single inverter solves the major problem of connecting several inverters in parallel. Additionally, the need to stack voltage sources, like batteries or supercapacitors, in series which demand charge equalization algorithms, are eliminated as the voltage sources employed share a common ground. The inverter inherently solves the problem of capacitor voltage balancing as each capacitor is charged to the value equal to one of the input voltage every cycle. State analysis, losses, and the selection of capacitance are examined. Simulation and experimental results at different distribution frequencies, power levels, and output harmonic content are provided to demonstrate the feasibility of the proposed multilevel inverter topology. [ABSTRACT FROM PUBLISHER]

Details

Language :
English
ISSN :
08858993
Volume :
33
Issue :
7
Database :
Complementary Index
Journal :
IEEE Transactions on Power Electronics
Publication Type :
Academic Journal
Accession number :
128664822
Full Text :
https://doi.org/10.1109/TPEL.2017.2742525