Abstract
PV) cell converts sunrays into electrical energy, which has non-linear I-V characteristics. For extracting maximum power from photovoltaic (PV) array for varying environmental conditions, it is necessary to use MPPT tracker. The MPPT consists of DC-DC converter and MPPT algorithm, DC-DC converter is inserted between solar panel and load or battery. The task of MPPT tracker is to match input impedance of the converter and it is equals to the equivalent output impedance of the solar panel to achieve unique point (MPP) where maximum power extracted. The used TL598 based DC-DC converter operates with defined MPPT algorithm. The DC-DC converter output power is controlled by varying its duty cycle to operating at knee voltage level. The novel algorithm is used for efficiently extracts the maximum output power from PV panel with the use of direct control method. The sensing of input voltage and current parameters, which are processed based on PO obtain higher efficiency and reliability as compared to standard methods. The MPPT has capability to propose the technique which has been verified experimentally with a 75-W solar panel for different insolation (incident solar radiation) level and under large signal insolation of level changes.
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