A Novel High Gain Interleaved Luo Dc–Dc Converter with Cascaded Fuzzy Logic Controller for PV System Application

The usage of distributed resources of energy like solar PV as an alternative to conventional electric power system is gaining immense popularity in the recent days. The integration of low voltage PV to the grid or load requires implementation of an efficient DC–DC converter of high voltage gain. Hence, an Interleaved Luo converter with higher voltage gain ability that combines the benefits of both switched capacitor and interleaved topologies is employed in this article. The infusion of the interleaving approach to the Luo converter minimizes the effects of output voltage ripples and input current ripples. The selection of a suitable controller is extremely mandatory for enhancing the operation of the interleaved Luo converter by aiding the efficient minimization of peak overshoot and settling time. A Cascaded Fuzzy Logic Controller (CFLC) that overcomes the drawbacks of conventional converters is adopted in this research work to significantly heighten the working of the Interleaved Luo converter. The comparative evaluation of CFLC with Proportional Integral controller and Fuzzy Logic Controller is also performed. The efficiency of the Interleaved Luo converter with CFLC is determined through MATLAB simulation. The Interleaved Luo converter operates with an impressive efficiency of 98.6%.