A new Interleaved Multilevel Boost Converter is presented with minimal Voltage Multiplier (VM) cells for high voltage step-up applications. The Interleaved-MBC is derived in such a way that maximum utilization of the voltage multiplier (VM) circuit operation can be achieved by the interleaved structure. Furthermore, compared to existing multilevel interleaved converters, the reduced number of capacitors and diode with equal voltage rating makes more attractive. Similar to existing multilevel converter, the feature of the Interleaved-MBC provides the extension of the number of levels to achieve the necessary voltages just by adding similar capacitor-diode stages (single capacitor and diode required to increase the stage by 1). The continuous input current, low input ripples, high voltage conversion ratio, reduced stress on devices,possible to feed from a single or double source, makes this more suitable for the voltage step-up applications, such as DC Link, hybrid Distribution Systems (DS), hybrid photovoltaic (PV) systems. The detailed analysis of the converter carried out by considering the non-idealities in the power circuit. The detail operation of the Interleaved-MBC is presented for Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) with boundary conditions. Experimental results are provided to validate the proposed circuit.

In Cascaded H-Bridge (CHB) Multilevel inverters (MLI), the application of Phase Shifted Pulse Width Modulation (PSPWM) and Level Shifted Pulse Width Modulation (LSPWM) are the two prominent techniques to attain the multilevel as well as better performance. But both of them have certain drawbacks like in PSPWM the switching loss of all the semiconductors are high and in LSPWM the power-sharing between the cascaded modules is not identical. These two drawbacks have been addressed in this paper by proposing a novel modulation technique, named the Phase Opposed Disposed Phase Shifted PWM (PODPSPWM). In this technique, the level-shifted carriers have been rotated in such a way that there should not be any active power loss and simultaneously the carriers are phase-shifted as per the PSPWM technique. A detailed mathematical analysis of switching loss for all three methods has been presented. Moreover, the power-sharing as well harmonic spectrum of proposed PODPSPWM over other PWMs have been discussed. This novel modulation technique has been simulated in the MATLAB/Simulink software to validate the superiority of the operation. The 1.5kW Experimental prototype is developed and validated the performance of the proposed PODPSPWM modulation.

In this article, closed-loop control and boundary condition for Continuous Conduction Mode (CCM) and Discontinuous Conduction Mode (DCM) of non-isolated Inverting Nx Multilevel Boost Converter (Inverting Nx MBC) are articulated. Inverting Nx MBC combined the features of classical boost converter and voltage multiplier to attain inverting N times higher voltage. Consequently, the Inverting Nx MBC provides a viable solution for high voltage step-up Photovoltaic (PV) applications with low voltage rating reactive components and semiconductor devices. The control strategy with saturation limiter is employed to achieve highly stable voltage. The modes of operation, benefits of Inverting Nx MBC, and key factor for the selection of semiconductor devices and sizing of the reactive components is discussed. Additionally, the effects of reactive components and semiconductor devices on the output voltage are examined. Experimental results of the developed circuit are presented to validate the design of converter, effectiveness and robustness of the implemented control algorithm for different input and output side perturbations.