Abstract

Model Based Controller Design method is used for developing an educational stand-alone photovoltaic (PV) energy conversion system with MPPT and Boost Converter. The developing method is based on modeling, simulation, and embedded code generation for the target microcontrollers. It is well known that efficiency of energy conversion for PV solar cells are influenced by temperature and solar irradiation. The energy of the solar cells changes continuously with weather conditions. To operate at the maximum efficiency, the PV cells must follow an optimum point of operation. A "hill-climbing"-Incremental Conductance algorithm to follow the maximum power point (MPPT) was adopted. The stand-alone conversion system consists of a PV solar module, a DC/DC boost converter controlled by a MPPT controller and a resistive load. The overall system is designed under a Problem Solving Environment and the MPPT controller is implemented according to the MATLAB/Simulink. The main task of controller is to regulate the output voltage of the boost converter and to get the maximum power generated by PV solar module. The duty cycle of boost converter is continuously adjusted according with the power generated by the PV module which is changed with the weather conditions. Hardware in Loop simulations and experimental results are analyzed and presented for this educational system.

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