Step-Up Series Resonant DC–DC Converter with Bidirectional-Switch-Based Boost Rectifier for Wide Input Voltage Range Photovoltaic Applications

Abstract

In order to facilitate photovoltaic (PV) applications, this research suggests a series resonant converter (SRC) based high gain DC-DC converter. In order to keep converter realization costs down, low-power applications often have a modest resonant inductance, leading to low-quality factor values; this research takes this into account. The switching frequency of these SRCs, however, is set. To control the input voltage across a broad range, the suggested architecture makes use of an alternating current (AC) switch. According to the results of this research, the current topology using a bidirectional switch can only regulate the input voltage within a certain range. To achieve circumvent this problem, the suggested converter rearranges the resonant tank so that is known as the capacitor that resonates located before to the bidirectional switch. The suggested converter has a lower duty cycle than its current equivalent at the same gain because the reorganization changes the dependency of the DC voltage gain on the duty cycle. A theoretical investigation reveals that, at maximum input current, the range for regulating we have an input voltage of expanded to include the area of large DC voltage gain values. In contrast to its predecessor, the suggested converter maintains its input voltage control range even when the resonant inductance values span a large range. Still, the suggested converter retains the SRC's benefits, namely the ability to flip on the primary-side semiconductor switches which use zero voltage switching (ZVS). At zero current, the output-side diodes are also disabled. We theoretically and experimentally compare the proposed converter to its current equivalent and its simulator. To back up the theoretical study of the suggested converter, a simulation is used.