High Step-Up Three-Level Soft Switching DC-DC Converter for Photovoltaic Generation Systems

In this paper, a high step-up three-level DC–DC converter with symmetric structure for PV application is proposed. The has voltage gain. This achieved due to the use of two cells and resonant paths in its structure. low input current ripples stress across all switches equal half output voltage. proposed uses simple pulse–width modulation (PWM) trigger switches. Hence, benefits from control circuit. All semiconductor devices are turned on/off under ZCS conditions. Thus, switching losses decreased, total efficiency increased. implemented tested through laboratory prototype. experimental results verify theoretical analysis.