Design and Analysis of High Gain Converter with Low Duty-Ratio for DC Grid

Abstract

A high voltage gain non-isolated DC-DC converter is proposed in this work using two active switches and six passive switches. The proposed converter has Switched Inductor, Capacitor network (SLC) and voltage quadrupler (VQ) network at the output side, which boost the voltage at the load. The proposed converter (SLCVQ) has higher voltage gain with a lower duty ratio and less components compared to the existing converters. The SLCVQ converter topology is presented and the comprehensive operation of the circuit is discussed with mathematical calculations. The components of the proposed converter are designed for 500 W, 50kHz, 650V output voltage and simulated using a PSIM environment. The simulation results confirmed that the proposed converter has high voltage gain, which can be used for renewable energy sources applications like smart grids, microgrids, etc.