MPPT based photovoltaic boost half bridge converter for grid connected system

摘要

This paper deals with the photovoltaic based boost half bridge converter for grid connected system. The main feature of boost half bridge converter is less usage of components with an isolation transformer for safety purposes. A low voltage PV panel is interfaced with a boost half bridge converter (BHB) it is then cascaded to a full bridge inverter to the grid. Since the PV panel has a non-linear characteristic, hence a maximum power point tracking (MPPT) controller is required to track the maximum power point. Various MPPT algorithms are available among which, a variable step size MPPT algorithm is employed with a change in reference voltage. In order to achieve grid synchronization a control circuit is developed using a Proportional Resonant controller (PR). Simulation results are provided to validate the performance of circuit operations and MPPT algorithm.