Single-Phase 9L Switched-Capacitor Boost Multilevel Inverter (9L-SC-BMLI) Topology

• Main Authors: Siddique M.D., Aslam Husain M., Iqbal A., Mekhilef S., Riyaz A.
• Other Authors: 57200143813
• Format: Article
• Published: Institute of Electrical and Electronics Engineers Inc. 2024
• Subjects: Boost inverter; multilevel inverter; nine-level (9l); single dc source; switched-capacitor (SC); Bridge circuits; Electric inverters; Pulse width modulation; Topology; Voltage control; Boost inverters; Boosting; Multi Level Inverter (MLI); Multilevel inverter; Multilevels; Nine-level (9l); Single dc source; Single phasis; Switched capacitor; Switched-capacitor; Capacitance
• Institution: Universiti Tenaga Nasional

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. � 1972-2012 IEEE.