A New Topology for Switched Capacitor Multilevel Inverter Based on H-Bridge Submodules

Subject Areas : Renewable energy

Majid Hosseinpour ¹ , Erfan Panahlou ² , Ali Seifi ³ , Abdolmajid Dejamkhooy ⁴

1 - Department of Electrical Engineering- University of Mohaghegh Ardabili, Ardabil, Iran
2 - Department of Electrical Engineering- University of Mohaghegh Ardabili, Ardabil, Iran
3 - Department of Electrical Engineering- University of Mohaghegh Ardabili, Ardabil, Iran
4 - Department of Electrical Engineering- University of Mohaghegh Ardabili, Ardabil, Iran

Received: 2022-05-14 Accepted : 2022-08-09 Published : 2022-08-09

Keywords: Voltage gain, multilevel inverter, Self-Balance, Reduced components,

Abstract :

Reducing the number of voltage sources and the power electronics components while obtaining voltage boosting in the output voltage are the key parameters in the research area of the multilevel inverter design. A lesser number of components would ensure lesser cost while higher boosting ability increases its application potential. In this paper, a new H-bridge based single-source switched capa­citor multilevel inverter structure is introduced. The proposed structure including two K-type units (KTU) can produce nineteen voltage levels with a voltage boosting of 1.5 times the input voltage. This converter consists of fourteen switches, two diodes, one voltage source and five capacitors with self-balancing capability. A comprehensive comparative comparison with the recent presented topologies have been carried out to investigate the performance of proposed structure. The main features of the proposed structure are utilizing single DC voltage source, self-balancing of the capacitors the capability of the input voltage, reducing the power electronics components in terms of voltage level count, and thus reducing the overall cost. The simulation results in the Matlab/simulink environment and the experimental laboratory results are provided to verify the satisfactory operation of the propo­sed topology.

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