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This study presents a new boost DC-link integrated multilevel inverter (BDIMLI) topology for single-phase stand-alone photovoltaic applications. The BDIMLI is realised by the integration of two two-level boost DC-link converters (TBDCs) with a hybrid H-bridge inverter using symmetrical voltage sources. Conventional cascaded multilevel inverters require a large number of isolated DC source and circuit components. On the other side, switched capacitor multilevel inverter topologies require less number of sources and components, but need bulky capacitors. The proposed TBDC units charge the capacitors to the desired voltage with the high switching frequency, hence require less capacitance and component count. The proposed topology with proper selection of capacitor voltage levels can produce 9-, 11- and 13-level outputs without altering any circuit components. Besides, the proposed topology produces low-frequency common-mode voltage. The comprehensive analysis of BDIMLI in comparison with recent multilevel inverter topologies is presented. An experimental prototype of BDIMLI is built and its dynamic behaviour with different load conditions is presented for both 9- and 13-level operations.

Single-phase grid-connected Transformer-Less inverters are widely used to connect solar PV systems to the utility grid. A new topology for high gain Transformer-Less inverter for grid connected systems has been proposed in the paper. It consists of six power switches, two inductors, two diodes, two capacitors and a filter at the inverter output level. Even though the model predictive control is complicated in implementation, it is faster and more accurate compared to other control schemes. The MPC algorithm operation is verified on a high gain Transformer-Less inverter in MATLAB/Simulink.

In this paper, a new three phase transformerless step-up inverter with pulsating DC-link is presented for PV/EV applications. The proposed inverter provides step-up, semi single stage operation along with reduced components and size. To verify the operation of the proposed inverter a simulation model is developed and the results for closed loop operation are presented.

Differential boost inverters (DBI) formed by differentially connected two dc-dc converters to produce singlephase AC voltage. DC-DC converters in DBIs are developing the voltage higher than peak of the output voltage waveform and experiencing higher voltage and current stresses. Thereby causing more power loss and lower efficiency issues. In this paper, new differential buck-boost inverter (DBBI) is presented to reduce the voltage stress of semiconductor devices and inductor currents. The detailed operation of the proposed inverter is explained. Also, simulation results and comprehensive comparative analysis are presented.

In this paper, a new single-stage transformerless cascaded differential boost single-phase PV inverter for grid-tied applications is proposed. It is the cascading of boost converter and buck-boost converter with sharing of two switches. The output voltage is the differential voltage obtained between the two converters. The proposed converter eliminates the need of output filter. The proposed converter have reduced number of devices compared with existing topologies. The principle of operation, its analysis and design procedure are discussed. Further, the theoretical analysis is validated with simulation results for 500 W output.

In this paper, new single-stage boost multilevel inverter (MLI) is presented. A proposed 5-level basic unit is proposed, which is utilized for the construction of generalized symmetrical and asymmetrical configurations.The proposed topology provides high boost factor with reduced capacitor count and size. The design of 11-level inverter is explained in detailed, and also, simulation results for steady-state and dynamic load conditions are portrayed. Additionally, a few key parameters of proposed topology are compared with recent existing MLIs and tabulated.