A new extended single-switch high gain DC–DC boost converter for renewable energy applications

Abstract

High-gain DC/DC converters are considered one of the most important components of green energy systems. Large numbers of these converters are used for increasing the voltage gain by using an extreme duty cycle. However, it increases losses and the cost, degrades the system performance, and hence obtains a low efficiency. In this article, a new design of a high-gain DC/DC boost converter is proposed. This converter has the potential to be used in low input voltage applications that need a high voltage gain such as systems powered by solar photovoltaic panels and fuel cells. The new topology is characterized by its simplicity of operation, high voltage gain, better efficiency, continuity of the input current, reduced number of inductors and capacitors, and can be extended to get higher gains. The converter structure, principle of operation, and design consideration of inductors and capacitors are presented in detail. Derivation of power losses and efficiency is presented. A laboratory prototype is implemented, and various experimental tests are given. The achievement of the suggested design is confirmed and compared with other recent high-gain converters.

Ultra‐high voltage gain DC–DC converter based on new interleaved switched capacitor inductor for renewable energy systems

“…Moreover, the proposed converter is designed with only four inductors, each with a smaller value in comparison to the converter in Rajesh and Prabaharan, 16 which employs five inductors with higher values. Additionally, the converters in other studies 3,4,7,8,10,11,13,15,16,22,24,25,[27][28][29][30]32 incorporated a higher count of capacitors than the proposed converter, which can raise internal resistance and adversely affect system performance, ultimately reducing voltage transfer gain. In the proposed converter, the input current remains non-pulsating at both low and high duty cycles, whereas the converters in previous studies 4,15,[31][32][33]35,36 have pulsating input currents at high and low duty cycles.…”

“…Additionally, the converters in other studies 3,4,7,8,10,11,13,15,16,22,24,25,[27][28][29][30]32 incorporated a higher count of capacitors than the proposed converter, which can raise internal resistance and adversely affect system performance, ultimately reducing voltage transfer gain. In the proposed converter, the input current remains non-pulsating at both low and high duty cycles, whereas the converters in previous studies 4,15,[31][32][33]35,36 have pulsating input currents at high and low duty cycles. Lastly, the suggested converter boasts a higher voltage gain ratio compared to previous boosting converters, making it particularly suitable for RES that require fixed and variable high output voltage with a wider range in duty cycle with efficiency 96.7%.…”

“…However, photovoltaic solar panels produce a variable low‐voltage output that is not suitable for applications requiring high DC supply voltage. To overcome this limitation, DC–DC converters are employed to boost voltage for various applications, including LED street lights, microgrid systems, uninterruptible power supplies, and medical equipment 3–5 . Various converter topologies is proposed to attain high voltage gain ratio, including boost, and SEPIC, converters.…”

“…To overcome this limitation, DC-DC converters are employed to boost voltage for various applications, including LED street lights, microgrid systems, uninterruptible power supplies, and medical equipment. [3][4][5] Various converter topologies is proposed to attain high voltage gain ratio, including boost, and SEPIC, converters. However, these converters face challenges when used for high voltage gain.…”

“…However, they suffer from drawbacks such as excessive usage of passive and active elements, a high count of diodes, increased parasitic resistance of capacitors and inductors, and reduced efficiency. 4,15 Furthermore, elevating the turn ratio of coupled inductors for heightened voltage gain results in escalated internal resistance, consequently diminishing system efficiency. The combination of a low switching frequency requires substantial inductors and capacitors, while the reduced (Ron) of the MOSFET further diminishes voltage gain.…”