Design and Development of High-Gain Non Isolated DC-DC Converter Topologies for Renewable Energy Applications
| dc.contributor.author | Chakraborty, Soham | |
| dc.date.accessioned | 2026-10-12T09:25:27Z | |
| dc.date.available | 2026-10-12T09:25:27Z | |
| dc.date.issued | 2022 | |
| dc.description.abstract | With the beginning of the 21st century, there has been an exponential rise in energy demand due to the growth in the industrial sector, rise in population, increased standard of living, and modification in the transportation system with the promising technology of electric vehicles etc. However, most of the demand is supplied by non-renewable sources such as coal, oil, and gas, which leads to a growth in carbon dioxide emission and consequently causes environmental pollution, global warming, and severe climatic issues. To trim down the global carbon dioxide emissions, green energy sources such as solar, biomass, fuel cells, and wind plays a pivotal role. Among these, photovoltaic is preferred the most as it has many advantages such as reliability, long life, less maintenance, etc. However, the output voltage of the single module photovoltaic is low enough to get suited with the dc-link voltage. For that, there is a need to integrate many PV panels, which requires a larger area to lay down. Another solution to this problem is employing a dc-dc converter to boost the output voltage level to fulfill the load requirements. Conventional boost converter offers high voltage gain with the duty cycle approaching infinity. But, practically, it gets limited due to the ESR effect of capacitance, DCR effect of inductance, conduction loss of the switch, etc. Also, the extreme duty cycle causes transients problems, as it won’t allow transferring the energy stored in the inductor, and the capacitor as the diode has a reverse recovery problem. Another limitation of the boost converter circuit is that it has the RHS Zero in the P-Z map, making it a Non-Minimum Phase (NMP) system. For such NMP systems, the high bandwidth controllers are challenging to create, and transient response is not as fast as desired. In this consideration, an enhanced circuit topology of the DC-DC converter is designed with a multilevel switched capacitor cell and switched inductor cell based on a quadratic boost converter. The switched inductor quadratic boost converter is the first stage to boost a dc source voltage. The second part is the multilevel switched capacitor cell, which helps to increase the voltage level obtained from the first stage. While developing the high gain converters involves a huge count of components. To achieve high conversion gain with a reduced count of components, another converter design combined voltage multiplier cell, and voltage-lift switched inductor cell is developed. The topology is designed with a voltage multiplier cell, and voltage lift switched inductor cell followed by a quadratic dc-dc boost converter. The first stage consists of a voltage lift switched inductor and quadratic boost converter to increase the voltage gain. The second stage is the voltage multiplier cell which doubles the gain obtained from the first stage with reduced voltage stress across the switch. The steady-state analysis of the developed converters is done in continuous conduction mode. To mitigate the design limitation of the boost converter having RHS zero in the P-Z map, a tapped-coupled-inductor boost converter is developed, which minimizes the effect of RHS zero and helps to increase the gain of the converter by reducing stress across the active switch. A dual-loop control strategy is employed based on a PI controller to regulate the output dc-link voltage during dynamic conditions. The developed circuit topologies have been simulated using MATLAB/Simulink. The hardware implementation of the quadratic boost converter with PCB design is performed with detailed circuit analysis. | |
| dc.identifier.uri | http://nits.ndl.gov.in/handle/123456789/223 | |
| dc.language.iso | en | |
| dc.publisher | Department of Electrical Engineering, NITS | |
| dc.relation.ispartofseries | D1587 | |
| dc.title | Design and Development of High-Gain Non Isolated DC-DC Converter Topologies for Renewable Energy Applications | |
| dc.type | Thesis |