PV sistemi için aktif güç dekuplajlı tek fazlı gerilim kaynaklı evirici

This thesis provides a grid-connected single-phase H-bridge inverter with active power decoupling circuits for second-order harmonic power reduction. Single-phase grid-connected inverters store energy to isolate natural dual-frequency ripple power using the DC port. It can be achieved by using a large electrolytic capacitor known as passive power decoupling. Minimum required passive decoupling capacitance to buffer energy flow among the AC and DC port is signified and the active power decoupling circuits are offered to further the decrements of the DC link capacitor size. H-bridge inverter and boost converter are analyzed to understand clearly why DC link capacitor is being used. After that active decoupling circuits are analyzed and applied to the system. According to analysis of active power circuits, their efficiencies are compared. The single phase voltage source inverter with 500 W of power capacity is simulated by MATLAB/Simulink to evaluate the ripple power decoupling methods and associated algorithms in terms of reliability and efficiency. In this thesis, OSG based control algorithm is applied to grid-connected inverter and MPPT algorithm is applied to the boost converter to get maximum power from PV array. And also three types of APD circuit are applied and the whole system successfully worked. The pros and cons are compared for different APD types. Also the HIL simulation is applied to APD method.