Abstract
A new topology for high step-up nonisolated DC-DC converter for solar PV applications is presented in this paper. The proposed high-voltage gain converter topology has many advantages like low-voltage stress on the switches, high gain with low duty ratio, and a continuous input current. The analytical waveforms of the proposed converter are presented in continuous and discontinuous modes of operation. Voltage stress analysis is conducted. The voltage gain and efficiency of the converter in presence of parasitic elements are also derived. Performance comparison of the proposed high-gain converter topology with the recently reported high-gain converter topologies is presented. Validation of theoretical analysis is done through the test results obtained from the simulation of the proposed converter. For the maximum duty ratio of 80%, the output voltage of 670 V is observed, and the voltage gain obtained is 14. Comparison of theoretical and simulation results is presented which validates the performance of the proposed converter.
Highlights
The application of renewable energy sources for day-to-day life is increasing widely
The output voltage obtained from the solar photovoltaic (PV) panels is very low, and it cannot be connected to highvoltage load or grid directly
The proposed converter was operated with d1 = 0:4 and d2 = 0:8, and the voltage conversion ratio was theoretically calculated as 14
Summary
The application of renewable energy sources for day-to-day life is increasing widely. This is due to clean and green nature of energy produced by renewable energy sources. The design improvement of these high-gain DC-DC converters with respect to increased voltage gain, component reduction, increased efficiency, and reduced losses is still being reported by many researchers. These high-gain DC-DC converters find their applications in fuel cells, electric vehicles, battery energy storage, automotive industries, and uninterrupted power supplies [1,2,3,4]
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