Analyze and Implementation of High Gain DC-DC Topology Recommended for Renewable Power Generation

Abstract

In this work, a novel topology of high voltage rate DC-DC topology with high output voltage and high efficiency is proposed for photovoltaic application according to magnetic inductor and switching-capacitor unit (SCU). SCU increases the output voltage and acts like a voltage clamp and decreases the maximum blocking voltage of the switch. Thus, a low rated and cost power switch can be used in the recommended topology. Additionally, in this converter one magnetic core is used. The magnetic inductor technique is one method to enhance the output voltage without increase of the MOSFET duty cycle which is utilized in the proposed converter. As a result, using magnetic inductor and SCU, the output voltage of the recommended topology is increased with small peak voltage of the semiconductor, low elements count, low switch loss, and high power. The other benefit of the presented topology is the zero-voltage switching (ZVS) and zero-current switching (ZCS) of diodes. In order to demonstrate the accomplishment of the proposed structure, the technological expression, numerical analysis, and comparison survey with same family DC-DC converters are prepared. Eventually, experimental results with 200 W load power are presented to verify the mathematical survey.