Harmonic Analysis of Nonisolated DC/DC Boost Converter for Photovoltaic Systems

Abstract

The implementation of renewable energy sources, including solar energy, is continually rising due to the depletion of fossil fuels and their harmful effects on the environment. Since the voltage level obtained from solar energy panels is low and varies according to the environmental conditions, it is necessary to use an DC/DC boost converter. In this paper, for photovoltaic systems a non-isolated DC/DC converter is proposed and the circuit dynamics are analyzed. The success of the proposed circuit is evaluated with the outcomes obtained from the study. As a result of the analysis with Fast Fourier Transform (FFT), the effect of different frequencies on the circuit operation is determined. With the recommended DC/DC boost converter, a wider range of output voltages is achieved compared to the traditional converter. It has also been demonstrated that the suggested strategy results in less output voltage fluctuation and overshoot. Additionally, the outcomes obtained from the FFT analysis can be used to evaluate the dynamics of the power electronic components in the circuit. On the other hand, compared to the traditional converter, it has been noted that the input current of the suggested circuit has higher harmonics.