A PV FED BUCK BOOST CONVERTER COMBINING KY AND BUCK CONVERTER WITH FEEDBACK

Abstract

This seminar report proposes a PV fed buck boost converter combining KY con verter and synchronously rectifier converter. Both the converter uses same power switches. As the demand for electrical energy is increasing, renewable energy sources has come into popularity especially photovoltaic systems (PV). PV can act as a volt age source which act as input to the proposed buckboost converter. Basic circuit has no control loop, for more efficiency and to reduce harmonic distortion added a feedback controller. THD was reduced by 45 percent. Using the control loop, we can achieve the desired output. The transfer function analysis of such converter shows that it has no right half plane zeros, so that stability is increased. Since both the converter uses the same power switches correspondingly the cost is reduced and also the circuit is made compact. Simulation has been carried out to study the perfor mance of the proposed topology in MATLAB/SIMULINK environment. Simulation results analysed and results presented for circuit.