IV Tracer For Photovoltaic Panel

• Published in: 2021 7th International Conference on Engineering, Applied Sciences and Technology (ICEAST) pp. 54 - 57
• Main Authors: Sirichote, Wichit, Wuttikornkanarak, Chawin, Srathongkao, Siwa, Suttiyan, Saisudawan, Somdock, Nuttakrit, Klongratog, Bhanupol
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01-04-2021
• Subjects: Current measurement; Electronic load; Fill factor; Fill factor (solar cell); IV characteristic; Logic gates; Maximum power point; Microcontroller; Organic light emitting diodes; Photovoltaic panel; Power measurement; Short-circuit currents; Shot-circuit current; Voltage measurement
• DOI: 10.1109/ICEAST52143.2021.9426264

A device used for measuring the current-voltage characteristic of the photovoltaic panel has been developed. The circuit is built with the STM32F103C8, Arm based 32-bit microcontroller. The power MOSFET is used as the electronic load. The electronic load is controlled by varying the gate-source voltage between 0 to +3V. The voltage is detected with a voltage divider across the Panel's output terminal. The current is detected by the high wattage current sensor, 0.1 Ohms 10 Watt. The control firmware sweeps the gate voltage and captures the current-voltage signal with 56 sampling points. The current-voltage curve is plotted on the 128x64 pixels OLED display. The results show the maximum power point (P MAX ), open-circuit voltage (V oc ), short-circuit current (I sc ), and fill factor (FF).