Maximum Power Point Tracking Using Very High Frequency Resonant DC/DC Converter for Photovoltaic Systems

A modified Very-high-frequency (VHF, 30300 MHz) resonant converter has been introduced in this proposed system of maximum power point tracking (MPPT) to extract solar power out of PV arrays with greater stability. For the purpose of assessing the duty cycles of resonant, MPPT controller is used. The proposed modified design of this type of converter features reduced conduction loss at the load side, reduced core loss, low device voltage stress, high efficiency over a wide load range, and excellent transient performance. The conduction losses have been reduced based on soft switching technique by replacing the diode with MOSFET. For all kinds of simulation and development, MATLAB Simulink is used. The overall system efficiency, amount of ripple current on both PV side and load portion, power on both sides and investigation on system stability under several conditions have been considered. From the simulation result, it can be seen that the overall system efficiency has been improved. The significant advantage of this proposed system is that there are low ripple content in both the current of PV side and load side.