Volume -I , Issue -III, February 2014

Design of Safety, High Step-Up DC–DC Converter for AC PV Module Application

B.ASHOK, J.MOHAN

In current scenario, the world is giving importance to renewable energy power generation is to meet electricity demand. The power generated by using Photovoltaic (PV) panel has been connected to the applications, through the DC-DC converter and DC-AC inverter. This paper proposes a new high step up DC-DC converter with floating active switch isolates the energy from the PV panel when the AC module is off & also act as high state drive. It also regulates the DC interface between the DC-AC converters. The high step up voltage conversion ratio is obtained with numerous turns ratio of a coupled inductor and also with appropriate duty ratios. The energy stored in the leakage inductor, will be recycled by magnetizing inductor LM present in the coupled inductor to the R load through the output capacitor C3. By applying 15V input voltage and 200V output voltage is obtained, designed converter circuit attains 98W as output power. This is better than conventional convert model efficiency.

Active floating switch, AC module, Coupled inductor, high step up Voltage conversion ratio.

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