Akademik Veri Yönetim Sistemi
2022 11th International Conference on Renewable Energy Research and Application (ICRERA), İstanbul, Türkiye, 18 - 21 Eylül 2022, ss.1-6
Photovoltaic (PV) panels are an integral part of microgrids that are becoming increasingly common. Maximum power point tracking (MPPT) algorithms are used to benefit from the energy produced by the panels with maximum efficiency. These algorithms use many data such as open circuit voltage, short circuit current, and seasonal information. As a result, the MPPT algorithm transfers the electrical power to the grid via DC/AC inverters or to the energy storage system via DC/DC converters. The energy storage system may contain battery and/or capacitor banks. Voltage regulation is provided by controlling the effective resistance of these capacitances. Thus, the power balance of the system is ensured. Additionally, to all this process, because of there is a diode in the PV panel’s equivalent circuits and batteries have variable resistance, the cascading of these components causes a high non-linearity. In this study, analytical expressions for MPPT control are derived by open circuit voltage method of PV panel connected to DC bus. To prove the accuracy of the extracted model, it has been tested under constant and variable load conditions. The results were compared with the Proportional-Integral (PI) controller adjusted by Ziegler-Nichols method and its effectiveness was observed.