Development of generalised and optimum structures of a multilevel inverter using switched capacitor technique for renewable energy conversion systems
by Tapas Roy; Neha Aarzoo; Abhijit Dasgupta
International Journal of Power Electronics (IJPELEC), Vol. 14, No. 1, 2021

Abstract: A novel multilevel inverter topology is presented in this paper. The presented topology is based on the concept of switched capacitor technique. The important features of proposed topology are that it uses symmetrical DC power sources to generate different output voltage levels, it has self-voltage balancing capability to balance the capacitor voltages and it can boost the input voltages to desire voltage levels. Further, optimal structure of proposed topology is developed from general structure of presented topology. The proposed topology requires less components such as switching devices, DC power supplies, capacitors, diodes to generate specific number of output voltage levels in comparison with other topologies. Phase disposition pulse width modulation (PDPWM) scheme is employed for switching the proposed inverter. Extensive simulation and experimental studies of 17-level proposed inverter structure prove its merits and effectiveness. The proposed topology can be applied in renewable energy conversion systems such as photovoltaic systems to generate boosted multilevel output voltage from low voltage DC renewable sources.

Online publication date: Thu, 29-Jul-2021

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