Abstract
In this study, a simulation of a standalone photovoltaic system with a power of 4.2 kW was carried out. In the system, which has a total of 20 photovoltaic panels, the perturb & observe maximum power point tracking method was used, and photovoltaic panel control was performed by a DC-DC boost converter. Thus, maximum power could be drawn from the panels continuously despite changing weather conditions. Batteries are used to store energy in this system, which operates independently from the network. The battery group with a total voltage level of 300V was charged and discharged by a bidirectional DC-DC converter. With variable radiation values, variable power generation was provided in the panels, and energy flow control in the system was realized. The required energy flow in the system has been controlled depending on the amount of energy generated from the photovoltaic panels, the energy demanded by the load and the state of charge of the battery pack. The energy in the dc bus regulated at 400V voltage level fed the load with the help of a single-phase inverter. The system was operated in five different modes, and performance of the system was introduced.
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