An Improved Buck-Boost Converter Suitable for PV Application

In this work, an improved Input-parallel Output-series Buck-Boost converter (IOBBC) suitable for solar power generation system has been proposed and implemented. The voltage gain of IOBBC is higher than the voltage gain of the conventional Buck-Boost converter (CBBC). The closed-loop control of IOBBC has been developed with a Type-III controller. The operating performances of IOBBC have been investigated with designed controller under various conditions i.e., change in input/source voltage and change in load. It is found that the proposed IOBBC has been performed satisfactorily under the aforesaid operating conditions. The power efficiency of IOBBC has been measured and it is found that IOBBC is achieved the maximum power efficiency of 91.20%.