In this article, a new hybrid transformerless high voltage gain dc–dc converter was created by merging a two-inductor boost converter with voltage multiplier and switched capacitor cells. The main advantages of the proposed converter are high voltage gain, simplicity of operation, high efficiency, lower voltage, and lower current stresses on the components. A 200 W, 37.4 V/400 V, 100 kHz prototype was implemented in the laboratory to evaluate the proposed converter, which reached a maximum efficiency of 98.24 <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\%$</tex-math></inline-formula> . 

Hybrid High Voltage Gain Transformerless DC–DC Converter

The synchronous integration of numerous input and output loads is possible with multi-input (MI) and multi-output (MO) DC–DC converters. In this paper, the non-isolated DC–DC converter described, which has a high step-up capability and multiple ports for outputs and inputs for energy storage system (ESS) applications. The voltage level of the converter is changeable. The capacity to provide the large voltage increases with a low duty cycle portion, the ease with which each duty cycle can be controlled, and minimal power losses are all advantages of the proposed design. The proposed system offers advantages for applications requiring energy storage. In the continuous conduction mode (CCM), the operation principles, steady-state evaluation, and extracting of the voltage and current coefficients are performed. The supply sources can be inserted or withdrawn without causing a cross-regulation issue in the proposed converter. Ultimately, the functionality of the proposed structure is examined using simulation and the laboratory prototype that has been implemented. The proposed converter achieved 94.3% efficiency at maximum power. In addition, the proposed converter attained minimum losses with a difference of 28.5 W when compared to a conventional converter.

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Integration of Photovoltaic-Based Transformerless High Step-Up Dual-Output–Dual-Input Converter with Low Power Losses for Energy Storage Applications

The dual-input boost converter (DIBC) with voltage multiplier cell (VMC) and operating in continuous conduction mode (CCM) is feasible for applications with high voltage from low voltage renewable ...

Small-signal model and control approach for a dual input boost converter with VMC

This paper presents the modelling of a high voltage gain dual input boost converter (DIBC) by the signal flow graph (SFG) approach. DIBC is integrated with voltage multiplier cell (VMC) and operated with overlapping switching signals, i.e., greater than 0.5 duty ratio, to obtain high voltage gain. The multi-stage operation of the DIBC converter and the parasitic elements makes it more challenging to get a model to predict the converter’s all behavior than typical converters. Presents models of large-signal, small-signal, and steady-state. Furthermore, a feed-forward plus feed-back control strategy for VMC integrated DIBC is investigated. During load and line disturbances, simulation and experimental findings guarantee adequate voltage regulation.

Signal Flow Graph Model and Feed-Forward Control for a High Voltage Gain Dual Input Boost DC-DC Converter

Multi-input converters are utilised in renewable energy systems including photovoltaic or wind systems. In order to increase efficiency in these converters using soft switching technique is unavoidable. This article presents a multi-input soft-switching converter with coupled inductors. The proposed converter uses only one auxiliary circuit and its operation is simple. Operating modes, design considerations, and loss calculations of the proposed converter are described. Also, a controller circuit is proposed for this converter and its operation has been evaluated. All switches used in this converter are turned on and off under soft switching conditions. Proposed converter efficiency is increased in comparison with similar multi-input converters under the same conditions. The theoretical analysis has been confirmed with the simulation and experimental data of a 200 W prototype converter. 

A New Dual Input Boost Converter with Coupled Inductors

This paper presents the small-signal model of single voltage multiplier high voltage gain dual input boost DC-DC converter. The model is developed with parasitic parameters by the state space averaging technique followed by small-signal linearization. For this nonlinear and non-minimum phase converter an inner current loop and outer voltage loop control strategy with PI and compensators are designed in MATLAB. Simulation results corresponding to a step load change between 50 % and full load are presented which ensure proper voltage regulation by controlling the duty cycle of switching the two sources.

Small-Signal Modelling and Control of a High Voltage Gain Dual Input Boost DC-DC Converter

A DC-DC converter combined with dual input, dual boost at the input, integrated voltage multiplier cell (VMC) and larger duty cycles is needed to easily achieve a high voltage gain from the independent renewable energy resources (RES) which may be two solar photovoltaic (PV) energy sources. During load changes and input disturbances, the output voltage is to be regulated, which requires suitable control design. This paper presents the procedure for control design of the converter from its small signal transfer function model. The uncontrolled system is characterised by right-half s-plane zero (RHPZ) in the control to output voltage transfer functions and its performance is analysed. A dual loop control strategy employing PI with compensator is adopted and simulated using MATLAB. The results ensure the voltage regulation and active current sharing among the two DC sources.

K. Dhanalakshmi

Papers

Small-signal model and control approach for a dual input boost converter with VMC

Small-Signal Modelling and Control of a High Voltage Gain Dual Input Boost DC-DC Converter

Signal Flow Graph Model and Feed-Forward Control for a High Voltage Gain Dual Input Boost DC-DC Converter

Control Approach for a High Voltage Gain Dual Input Boost DC-DC Converter