High step-up converters are required for distributed photovoltaic generation systems, due to the low voltage of the photovoltaic source. In this paper a new hybrid high voltage gain DC-DC converter, created by merging the standard boost converter with a coupledinductor and different switched capacitor techniques, resulting in a hybrid converter. With a single switch and no requirement of higher duty cycle values, the proposed converter achieves a high voltage gain and high efficiency, in addition to lowered voltage and current stress of the components. A 200 W prototype was implemented experimentally to evaluate the converter, which reached a maximum efficiency of 97.6%.

A synthesis methodology for developing a set of very high step-up dc-dc converters is presented and discussed in this paper. The proposed method makes use of a boost converter as basic topology in which three step-up techniques are combined and incorporated. The studied techniques are the switched capacitors voltage multipliers (VM), the diode VMs, and the coupled-inductors. With the proposed methodology, many well-known converters are identified and two novel converters are proposed. In addition to a detailed analysis of the synthesis of each topology, a comparative analysis among of some important converters is presented. This comparison involves aspects such as voltage gain, voltage stress, component stress factor, component count, and relative cost. By means of these comparisons, the main characteristics and constraints of the analyzed converters are identified. Results from 250 W prototypes, designed according to photovoltaic ac-module specifications, are obtained experimentally to validate the theoretical analyses and point out advantages and limitations of each converter. The results demonstrate that the combination of the three studied techniques provides the best trend off on the comparative analysis carried out in this work.

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 $\%$ .

This paper proposes a different approach to combine stacked and cascaded configuration of dc/dc pulse-width modulation converter cells in order to access the benefits of both structures in a single-stage topology with a single active switch. In addition to presenting and discussing the concepts of cascaded, stacked, and the combination of both, this paper also proposes a new topology derived from these concepts. It provides high voltage conversion ratio with improved efficiency. As the name implies, this converter is obtained from the combination of two well-known dc/dc converter circuits, the Isolated Zeta Converter and the Quadratic-Boost Converter. Hence, it presents the combined features of both, i.e., high step-up voltage conversion, low input current ripple (Quadratic Boost features), and low output current ripple (Zeta's feature). In order to verify the feasibility and performance of the converter presented, two 250-W prototypes circuits have been implemented.

This article presents a family of transformerless active switched inductor and switched capacitor Ćuk high voltage gain dc–dc converters. The configuration of this family has the advantages of nonpulsating output current, high step-up voltage gain, low voltage, and current stress across the component. Thus, conduction losses are decreased owing to the low-voltage-rating of the semiconductors. The Ćuk converter with two switched-capacitor cells is evaluated in detail. The experimental results are provided to verify the theoretical analysis.

This paper proposes a novel single-switch dc/dc converter for the future renewable electric energy delivery and management system to implement the distributed renewable energy resources (DRER). The DRER is responsible for the maximum power point tracking of the photovoltaic panel (PV) module and also for the control of central energy storage device. Due to the characteristics of the PV module and the dc-bus, the single power stage must provide low current ripple in the input and output terminals, must operate with output current and voltage regulation, and present a high-voltage conversion ratio. To achieve such features, this paper proposes a novel integrated Boost-Zeta converter. To avoid a complex modeling and control, we propose a disaggregation concept for this. Experimental results are presented for the purpose of operating the converter and also for the operation of the system.