Single-phase 9L switched-capacitor boost multilevel inverter (9L-SC-BMLI) topology

Document Type

Article

Publication Date

1-1-2023

Abstract

The boosting factor has become a vital feature for a multilevel inverter to be connected with the low voltage PV system. In this paper, an inverter topology with 9 levels has been introduced. With the use of 10 switches and one switched capacitor unit, the proposed 9L-SC-BMLI has achieved nine different voltage states, and it has twice voltage gain. Without any auxiliary circuits, the voltage of the floating capacitor can maintain self-balanced. The additional feature of the proposed 9L-SC-BMLI has been the lower number of switches, voltage stress of reduced magnitude, and inherent polarity reversal of the output voltage without any H-bridge. The 9L-SC-BMLI has been controlled using the PD-PWM technique, i.e., phase-disposition pulse width modulation technique. In order to show the merits of the 9L-SC-BMLI, a detailed comparative study has been provided in the paper with several similar topologies. A number of simulation results have been provided in the paper with different working environments, and these results have been validated with the real-time results accomplished from a laboratory prototype.

Keywords

Voltage, Topology, Capacitors, Switches, Boosting, Multilevel inverters, Capacitance, Boost inverter, Multilevel inverter, Nine-level (9l), Single DC source, Switched-capacitor (SC)

Publication Title

IEEE Transactions on Industry Applications

Divisions

sch_ecs

Funders

None

Volume

59

Issue

1

Publisher

Institute of Electrical and Electronics Engineers

Publisher Location

445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA

Additional Information

IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), Jaipur, INDIA, DEC 14-19, 2020

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