Modeling, Analysis and Design of Synchronous Buck Converter Using State Space Averaging Technique for PV Energy System

In this paper, modeling, analysis and design of synchronous buck converter for low power photo-voltaic (PV) energy system is presented. For analyzing the performance such converter, first we studied the characteristics of PV array under different values of irradiance and temperature. Then the exquisite design of synchronous buck converter with the application of State Space Averaging to implement precise control design for the converter is presented. The synchronous buck converter thus designed is used for portable appliances such as mobiles, laptops, iPod's laptops, etc. In addition to that, closed loop control of synchronous buck converter is studied in order to meet the dynamic energy requirement of load especially during variation of source i.e. variation of solar irradiation and temperature. Further, the efficiency of synchronous buck converter is calculated and is compared with conventional buck converter. The studied model of complete system is simulated in the MATLAB/Simulink environment and the results are obtained with closeness to the theoretical study.