The development of switching converters to perform with the power processing of photovoltaic (PV) applications has been a topic receiving growing interest in recent years. This work presents a nonisolated buck-boost converter with a quadratic voltage conversion gain based on the I-IIA noncascading structure. The converter has a reduced component count and it is formed by a pair of L-C networks and two active switches, which are operated synchronously to achieve a wide conversion ratio and a quadratic dependence with the duty ratio. Additionally, the analysis using different sources and loads demonstrates the differences in the behavior of the converter, as well as the pertinence of including PV devices (current sources) into the analysis of new switching converter topologies for PV applications. In this work, the voltage conversion ratio, steady-state operating conditions and semiconductor stresses of the proposed converter are discussed in the context of PV applications. The operation of the converter in a PV scenario is verified by experimental results.

Noncascading Quadratic Buck-Boost Converter for Photovoltaic Applications.

The rapid use of renewable and sustainable energy sources in distributed generation system, the importance of energy storage devices forcing the researches to develop new key technologies. For continual power deliver, make greater use of renewable electricity sources, together with solar and wind. Power electronic converters are mostly connected among the different voltage buses and storage systems. Bidirectional dc-dc converter topologies are used for providing charging or discharging. This paper presents the quadratic nature for obtaining higher voltage gain ratios in step-down (buck) and step-up (boost) converter's operating states with reduced charging and discharging ripples. Proposed scheme has been developed and analyzed using MATLAB/simulink.

Analysis of Bi-directional DC-DC Buck-Boost Quadratic Converter for Energy Storage Devices

This paper presents performance analysis of switched boost dc-dc converter for distributed generation system in CCM (continuous conduction mode) operation, which combine the conventional switched-boost circuit with the switched-capacitor and switched inductor switching structure. Compared with the conventional boost converter, which uses convenient duty ratio, the presented topology is utilized to uplifting in voltage gain. The proposed topology exhibits advantages of the continuous current at the input and boost voltage conversion ratio without use of high duty cycle (approx less than 1) and transformer. Proposed converter supports in producing high output voltage gain by operating in different modes. The simulation result brought out from MATLAB 2016 b.

Neeti Dubey

Papers

Analysis of Bi-directional DC-DC Buck-Boost Quadratic Converter for Energy Storage Devices

Performance Analysis of Switched-Boost DC to DC Converter for Distributed Generation system