Single-phase boost switched-capacitor-based multilevel inverter topology with reduced switching device
Document Type
Article
Publication Date
8-1-2022
Abstract
A multilevel inverter (MLI) with a step-up feature has become significant for connecting a low-voltage PV system with a utility grid. An MLI has been presented in this article with a lower component count. The described structure has achieved nine distinguish voltage levels using 12 switches and a switched capacitor unit having twice voltage boost. A self-balancing of the floating capacitor voltage without any auxiliary circuits and precharging has been obtained. The new topology includes fewer switches, reduced voltage stress, and an inherent reversing polarity without the back-end H-bridge, which has been the additional feature of the proposed circuitry. The topology proposed has been controlled with the nearest level control pulsewidth control technique (NLC-PWM). A comprehensive comparative analysis with several similar topologies has been presented in this article to show the merits of the recommended topology. A number of simulation results using PLECS software have been discussed along with experimental results that have been obtained from a laboratory prototype. The validation of the proposed topology has been carried out using different steady-steady and transient operating conditions.
Keywords
Topology, Capacitors, Voltage, Switches, Multilevel inverters, Stress, Voltage control, Boost inverter, Multilevel inverter (MLI), Nearest level control pulsewidth control technique (NLC-PWM), Reduce switch count, Step-up inverter
Divisions
sch_ecs
Funders
Taif University, Taif, Saudi Arabia (Grant No: TURSP2020/146),Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, Saudi Arabia (Grant No: FP-107-43)
Publication Title
IEEE Journal of Emerging and Selected Topics in Power Electronics
Volume
10
Issue
4
Publisher
Institute of Electrical Electronics Engineers Inc
Publisher Location
445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA