Soft Switching Sepic Boost Converter with High Voltage Gain

The paper presents a high gain dc-dc converter which is derived from a traditional SEPIC (single-ended primary-inductor) converter. The distributed generation based system with renewable energy resources have rapidly developed in recent years. These distributed generation systems are powered by sources such as fuel cell, photovoltaic (PV) systems and batteries. This consists of two conversion stages, in the first stage the low level voltage from the PV cell is converted to high level voltage by using a dc-dc converter. In the second stage the high level dc voltage is converted into AC voltage by using inverter. The electrical energy demand requirements can be achieved by increasing the gain of the converter. The proposed converter high gain achieved by replacing the coupled inductor instead of inductor in the basic sepic converter. Further increase of gain is achieved by using charge pump capacitor cell. The main advantage of the sepic converter is continuous input current, which can be helpful in accurate PowerPoint tracking of solar cell The inductorless regenerative snubber that reduces switching losses and helps to attain soft switching (zero voltage and zero current switching) conditions.